CRG
Sharp MZ-700 Part 1
updated
It took a while to get to me (pesky Irish Sea in the way) but it is here now and it has arrived with perfect timing as it coincides with the Commodore themed charity event being run by Lee from @MoreFunMakingIt.
Lee and a bunch of us here on YouTube #mfmi2024 are getting together to offer items for sale with 100% of the monies raised going to the Befriending scheme - thebefriendingscheme.org.uk/.
So what possible better use could this VIC-20 be put to, it suffered a terrible fate in that place in which it was found. Let's try to save it, try to bring it back and let's hope it raises a lot of funds for the charity.
eBay Listing
ebay.co.uk/itm/176624647379
Other CRG videos relating to this sale
VIC 20 cosmetics - youtu.be/sCkvtFf33_g
Final Expansion 3 - youtu.be/s4mU6cVAIXY
Refurbished PSU - youtu.be/vHJrPBFI4XI
MFMI Links
morefunmakingit.co.uk/mfmi-charity-2024
morefunmakingit.co.uk/ebay2024
Just Giving Donation Link
justgiving.com/page/mfmi2024
CRG Links
CRG-2 - youtube.com/@UCDFfWx7km9M8qRB9x5-_LjQ
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/kx2FS8TSWV
CRG X (Twitter) - twitter.com/YT_CRG
Chapters
00:00 Intro
01:55 Just how bad is it
06:22 Cleaning and remove the obviously bad bits
12:28 Thoughts
13:50 New sockets, new parts and testing the rust
16:59 Special Guest
18:34 Moving the wire
19:55 Does it work
21:19 Scoping the problem
24:48 Down the rabbit hole
26:19 Kernal ROM
28:56 Turning to google
30:33 Testing the other board
35:25 Back to the first board with RAM
37:21 Omega Race
40:00 Cleaning
40:48 The reveal
42:06 Story time
43:00 The charity listing
49:17 Other charity links
50:20 Making a donation
One will go with the VC-20 charity auction running from the 12th (link will appear here) and the other is for me.
Build and test, that'll be straight forward enough won't it?
IT'S NEVER THAT EASY!
CRG Links
CRG-2 - youtube.com/@UCDFfWx7km9M8qRB9x5-_LjQ
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/kx2FS8TSWV
CRG X (Twitter) - twitter.com/YT_CRG
Chapters
00:00 Intro
02:41 Build
15:50 ICs and Programming
23:43 Case
25:03 Nothing is ever simple
31:57 Testing
42:52 Conclusions
Since the case is looking all nice and fresh again, lets do the same with the software and restore that back to its factory state and then let's throw some upgrades at it.
Site I got the 2086 systems disks from - vetusabandonware.com
CRG Links
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
CRG X (Twitter) - twitter.com/YT_CRG
Chapters
00:00 Intro
01:15 CRT
03:34 Motherboard and HDD
06:49 Does it still work?
09:13 Software RESTORATION
20:18 Windows 2.03
26:44 Benchmarks
28:23 Games
31:38 Upgrades
35:00 Upgraded benchmarks
36:27 Upgraded games
44:59 Downgraded windows?
45:59 PIFs
50:10 Another look at the CRT
54:05 Conclusions
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:37 Trying your suggestions
04:10 HALT, BERR and other CPU probing
07:46 What does it do without with TAG RAM
08:36 New TAG RAM
11:31 Testing
12:15 Defeated
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:49 What's on and in the box
06:27 First test
08:29 Jumpers
10:09 How it works
12:29 Contact cleaner
13:30 Silly Joke
14:11 Under the microscope
21:19 Scoping clocks
23:38 Observations
26:53 PLD clocks
30:55 CPU
32:43 Conclusions
On initial inspection it doesn't look too bad but by the time we're finished this turns into one of the worst I've ever repaired. That might be partly down to me though as I tried something a little different when cleaning this board up.
There's also a silly skit at the end so be sure to look out for that and thanks to @WhatHoSnorkers for the help :)
Please make sure to check out the following YouTube Channels
@NLKMediaGroup Retro computers and CB Radio
@WhatHoSnorkers Spectrum type in games
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:28 Initial look
03:00 Stripping down
07:43 244 & 373 testing
09:53 Cleaning up
11:45 Dremel mistakes
14:00 Solder coating
14:56 Review of the damage
20:42 Trace repair
23:44 More repairs
26:42 Almost back together
29:11 Assembly
31:38 Testing
35:55 Real Time Clock
41:36 Conclusion
43:25 Always wear a face mask while using a dremel (skit)
So join me as we head far deeper down this Sinclair Rabbit hole than I thought possible.
Links
Project Speccy - projectspeccy.com
Spectrum schematics - spectrumforeveryone.com/technical/zx-spectrum-pcb-schematics-layout
Parts - retroleum.co.uk
Music
@Momentvm Cathode Ray Gun - youtube.com/watch?v=J-wUZp9XXbc
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
02:52 Assembly
05:13 Fitting and Voltage
06:17 The problems begin
07:29 Other problems
11:27 Back to the backplane
12:57 Swapping ram and LS157s
14:26 128k ram mod
16:44 Loading problems
19:15 The plan
21:30 Address bus buffer testing
24:12 Fireworks
26:18 Termination
30:39 More loading woes
34:22 One last try
39:53 Conclusion
Links
Spectrum Schematics - spectrumforeveryone.com/technical/zx-spectrum-pcb-schematics-layout
Spectrum Parts - retroleum.co.uk/sinclair-zx-spectrum
Music
@Momentvm Cathode Ray Gun - youtube.com/watch?v=J-wUZp9XXbc
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:25 Diagnostics
02:27 Testing the ROM
04:43 A look at the schematics
05:29 Thinking about it
06:17 Logic Probe
07:32 ROM pin 15?
08:23 Physically broken?
10:47 Found the problem
13:08 Fixing it
14:20 Is it fixed?
Massive thanks to SparxUK for kindly donating this project.
Additional thanks to @YawningAngelRetro for letting me hold onto his 128k for this build.
Project Links
ZX-TSID - github.com/UzixLS/zx-tsid
NSID - https://zxart.ee/eng/software/tool/music/muzykalnye-plejery/nsid-player-pro/
Tapir utility can be found on this page - worldofspectrum.net/utilities
Other YouTube Channels mentioned in this video
@WhatHoSnorkers - Spectrum based coding skills and cosplay (you just need to watch it to understand)
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
02:22 Assembly
18:29 Programming
24:12 5V regulator at 5V
26:22 Initial testing
31:02 NSID player pro
34:42 Testing
43:00 Another look at the SwinSID
44:54 Finally figured it out
50:19 Conclusion
The mods completed in this video are a composite mod with audio and colour bleeding fix. Audio level fix, a jail bar fix and we also fit a new regulator.
All components were purchased from retroleum.co.uk
High quality spectrum schematics can be found at this link https://www.8bit-wiki.de/fileadmin/8bit-wiki/Sinclair/ZX_Spectrum/_zx128/manual/ZX%20Spectrum%20128%2B%20Schematics.pdf
Youtube channels mentioned in this video:
Yawning Angel (Amiga AMOS tutorials) - youtube.com/@UCAL2cRVgVCvbe8hscUCPbwA
Rose Tinted Spectrum (Vintage gaming shenanigans ) - youtube.com/@UCGDTjXnyGM5flG6Xk6fiMAg
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:30 Letter
02:38 Opening up
04:47 Composite mod
15:03 Components
16:20 Colour bleeding mod
18:33 Jail bar mod
21:27 Audio level mod
22:29 Replacement regulator
26:43 Revisiting the jail bar mod
32:40 Testing and printer problems
34:34 Tape tester
36:35 Dizzy
As I said in the video aligning a disk drive manually like this isn't necessarily the correct way to do it but it certainly is a lot easier than hooking up a scope and a lot cheaper than buying a test diskette (£60). I can't say for certain that it is aligned correctly but if it reads everything I try then surely that's enough.
Software used in this video
Amiga Test Kit - github.com/keirf/Amiga-Stuff/releases
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:48 Drive 1 inspection
04:41 Testing
06:57 Track 0 sensor adjustment (Lower head)
10:50 Upper head adjustment
13:48 Booting from DF1
14:55 Floppy drive speed
15:28 Lubrication
16:26 Quick note
17:40 Drive 2
18:40 Its dead Jim
20:47 Conclusion
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:38 Removing the old socket
03:16 Cleaning
04:44 Touching up solder points
05:55 Getting carried away
07:57 Review of the work and coating the solder
10:14 New battery holder
13:12 New socket
14:19 Gary
19:38 Testing
26:24 Conclusion
To do that I need the loop back dongles and so Steve from the CRG discord ordered the required PCBs from the shared projects section at PCBWay. He very kindly sent me a few boards, I've got the parts for them here so lets put them together and test my A1200s serial and parallel ports.
PCBWay Links
Serial Dongle - pcbway.com/project/shareproject/AMIGA_TEST_KIT_SERIAL_PORT_DONGLE.html
Parallel Dongle - pcbway.com/project/shareproject/AMIGA_TEST_KIT_PARALLEL_PORT_DONGLE.html
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:47 Thanks Steve
01:43 Assembly
06:39 Testing
09:39 Conclusion
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:58 Overview of problems
01:49 PC tear down
07:41 Motherboard tour
10:55 Looking for a short
12:01 Inside the PSU
12:51 Floppy drive
13:48 Hard drive
14:43 Found the problem
22:31 Testing the computer
23:53 Will the hdd boot
24:46 Tour of the HDD
31:50 Monitor tear down
34:34 Sketchy bit
36:41 Leaky caps
40:49 New caps
45:00 Monitor testing
51:45 Conclusion
Links
TF1260 Firmware and tools
http://www.tf1260.com
LIV2's CPLD programming guide
github.com/LIV2/Bluster/blob/master/Programming.md
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:28 Testing Gerry's 1260
03:25 FPU?
04:55 ATK testing
05:55 Power cycling
06:56 More testing
08:00 Overclocking test
08:50 Silkcut demo
11:42 A possible solution
12:39 Updating the CPLD firmware
18:29 Conclusion
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:00 The "Dremel"
03:30 Refitting
05:20 Testing
Thank you to everyone who donated, @GadgetUK164, @hackbuildrestore, @ReEnthused, Sean Beyer, Sean from Amiga Ireland, @TerribleFire, Richard, Steve, Tyrell, @YawningAngelRetro, @NLKMediaGroup, Darren Johnstone
Video Links
GadgetUK EMS ram card build - youtu.be/4EzCCTPdAM4
Hack Build Restore Amiga Zip Disk - youtu.be/OmjO12MW9Nk
CRG Links
CRG X (Twitter) - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
01:36 From @GadgetUK164
04:17 From @hackbuildrestore
07:17 From @ReEnthused
08:55 From Sean Beyer
12:39 From Sean
15:52 From @TerribleFire
16:51 From Richard
19:37 From Steve
20:54 From Tyrell
22:31 From @YawningAngelRetro
24:04 From @NLKMediaGroup
30:32 From Darren Johnstone
52:32 Conclusion
Many thanks to Jonathan (TRU) for donating the diag cart, I'm sure that will come in very handy for the future.
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music by Banjo Guy Ollie - @banjoguyollie
Thanks to MFMI and his discord for help with this one - @MoreFunMakingIt
Chapters
00:00 Intro
00:14 Letter
01:58 A look around the Spectrum
04:28 Getting inside
06:57 Look what I found
10:37 Checking voltages, reset and clock
13:53 Looking for a video signal
15:08 First power on
15:36 Was it the short?
16:14 Keyboard test
16:49 Testing an old ram chip
17:48 Assembling the diag cart kit
22:05 Configuring the diag cart
24:31 Testing the diag cart
26:18 Conclusion
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:37 The damage
01:28 Removing the old connector
04:04 Not off yet
05:13 Finally free
05:40 Clean up
06:11 Fitting the new connector
07:06 Testing
09:32 Conclusion
Turns out that issue was caused by the MPEG decoding chip but we have a replacement now so we swap that out but then find a new issue that might be impossible to solve. Does anyone have a source for 14.725mhz oscillators?
Prelude build video - youtu.be/ssciI4E9Fro
Links
Prelude github - github.com/wiretap-retro/Prelude-ZII-Sound-Card
Prelude software - aminet.net/package/driver/audio/PreludeSoftwareBundleV4.lha
AHI Version 6 - aminet.net/package/driver/audio/m68k-amigaos-ahiusr
AHI record - aminet.net/package/mus/play/AHIRecord-68k
Amiga Amp - http://www.amigaamp.de/
You may need to install MUI, this is the latest version - github.com/amiga-mui/muidev/releases/tag/MUI-5.0-2020R3
@GadgetUK164 Prelude Videos
Part 1 - youtube.com/watch?v=hRnVjtIwi1Q
Part 2 - youtu.be/X9wJaO2XbPw
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
02:14 Swapping the decoder chip
04:09 Magnification
05:23 Is it fixed?
07:08 From cables to pins
08:19 All fixed now?
10:33 Another problem!
14:15 Microphone input
16:54 Conclusion
Make sure to check out the Gould Fish On Games YouTube channel, here is his review of the CD32 console: youtu.be/oQ5nQ7ACykc?si=yZdnPuodHYZnYeIB
Music featured in this video during the recap: Momentvm - Cathrode Ray Gun: youtu.be/J-wUZp9XXbc?si=ddIP8r4Eo1qtoIYE
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:50 Opening up and inspection
04:36 Through hole to surface mounted
08:41 Recapping
13:18 A quick tour
15:20 Why your CD32 is better than a PlayStation
16:31 Powerful trivia
17:40 Quick clean
18:32: Recapping the recap
19:37 Testing
23:05 Conclusions
But this Amiga guy genuinely knows nothing about these machines so I reached out to someone who does know their way around an Atari and with Dave's help can we get this Atari STE up and running.
Exxos Shop - exxosforum.co.uk/atari/store2
Exxos PSU mod- exxosforum.co.uk/atari/last/psu/index.htm#DSP508
Thanks to Dave from the This Week In Retro Podcast. Check it out here - @ThisWeekinRetro
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Silly intro
00:53 What's in the box
02:38 Dave
05:35 Quick look around the case and accessories
09:22 More Dave
11:39 Initial test
13:02 Opening up
15:22 Is this the problem?
16:22 The motherboard
17:45 Final Dave
20:33 The plan
22:45 Repair montage
25:56 Test
28:24 Hdd port repair
31:00 A bit more maintenance
34:45 24 hours later
35:42 Testing some ST titles
39:12 Frontier
41:11 Secret of Monkey Island
43:55 We were at (oxygene)
46:12 Conclusion
Well, when the opportunity came up to join a group buy with @GadgetUK164 and a few other usual suspects I decided to join in the fun and so let's build a sound card for my Amiga... Let's build a Prelude with its MP3 decoder the mpegit addon.
Prelude github - github.com/wiretap-retro/Prelude-ZII-Sound-Card
Prelude software - aminet.net/package/driver/audio/PreludeSoftwareBundleV4.lha
AHI Version 6 - aminet.net/package/driver/audio/m68k-amigaos-ahiusr
AHI record - aminet.net/package/mus/play/AHIRecord-68k
Amiga Amp - http://www.amigaamp.de/
You may need to install MUI, this is the latest version - github.com/amiga-mui/muidev/releases/tag/MUI-5.0-2020R3
GadgetUKs Prelude Videos
Part 1 - youtube.com/watch?v=hRnVjtIwi1Q
Part 2 - youtu.be/X9wJaO2XbPw
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:15 What we're building
03:56 Time for some soldering
04:35 My expansion slot brackets
05:19 Back to the soldering
06:32 Tantalums
07:42 Resistors
09:14 Finishing off the passives
10:04 Crystals and sockets
11:35 SMD soldering time
14:53 Amazon capacitors?
16:07 How will we attach the MPEGIT?
17:23 Cleaning
18:13 Populating the chips
19:13 What does the PAULA sound like and what is AHI?
26:04 Installing the PRELUDE and a weird error
27:31 PRELUDE drivers
29:55 What does the PRELUDE sound like
33:02 MPEGIT installation
35:36 MPEGIT problems
39:43 Mixer and a microphone test
42:56 Conclusion
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
This one sends me on a bit of journey but sure its all good practise.
Featuring clip from @RobSmithDev used with permission.
Robs videos on repairing a shorted 1200:
Part 1 - youtu.be/AsxjCiL8l0A?si=Pr76UBdANi3UNdaK
Part 2 - youtu.be/-jFgK8Pa1Yg?si=kR3shlLe-9QeWmT3
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:18 A look at the board
03:30 Shorted capacitor?
05:11 Is it the through hole caps?
06:41 Is it the surface mounted caps?
09:45 The plan to find a shorted ceramic.
11:50 Not quite to plan
13:20 Plan B
15:29 Filter?
17:29 Repairing the broken power trace.
17:52 Testing
22:02 Trying to repair the CPU slot
24:00 Wrap up
My bracket can be downloaded here - thingiverse.com/thing:6289625
The original GBSControl mod video - youtu.be/QJ3ZAn1Q7Os?si=1M9SWJ6CDWuKpQ2A
Chapters
00:00 Intro
00:36 Look what I found
01:19 What goes where?
03:48 Soldering
04:34 Test fitting
06:04 Does the video still work?
07:01 3D printed bracket
09:01 Conclusion
Zorro Lan IDE Gitlab - gitlab.com/MHeinrichs/Zorro-LAN-IDE
Roadshow, Amiga TCP/IP stack - http://roadshow.apc-tcp.de/index-en.php
iBrowse, Amiga web browser - ibrowse-dev.net
Bracket - thingiverse.com/thing:6310738
Thanks to screemo, @GadgetUK164 and the guys over on A1k.org for their help assembling this card.
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:22 A look at the card
01:12 Getting started
02:25 SMD soldering
08:47 Through hole soldering
10:34 Programming
13:28 Jumpers
14:44 Testing the IDE
15:58 10 days later
19:22 Replacement MAGJACK
21:24 SJ2
22:32 Replacement LAN chip
26:22 Breakout board bracket
27:35 Conclusion
This is the first of as new mini build series that I'm going to do, I've got a few small projects like this but the idea is to release these in between the regular videos. Let me know what you think of this good in the comments.
BlueSCSI shop - bluescsi.flamelily.co.uk
BlueSCSI V2 Github - github.com/BlueSCSI/BlueSCSI-v2
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:47 What's in the bag
02:43 Assembly
05:22 Testing
08:27 Conclusion
A bit of an odd one because the A590 was sold as working and the Amiga itself certainly works fine, so why don't they work together?
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:24 What's in the box
01:02 Closer look at the edge connector
01:48 Letter
05:01 Reviewing the previous work
07:13 Restoring the edge connector
09:10 Testing the 500 first
10:42 First test with the A590
14:15 Testing and upgrading the ROMs
20:17 Does the A590 work?
22:16 Why doesn't it work on Richards A500+
23:50 Another test
25:46 Modifying the A590 to draw power from the A500
28:45 Does it work?
29:53 SD to SCSI
34:17 Conclusion
This machine came from the storage unit that @gingerhippygaming7962 cleared. In part one last time we got it working, this video finishes it off... for now anyway, we're never truly finished with this things are we?
Make sure to check out Ginger Hippy Gaming's channel as he has looked at many systems that were pulled out of this place.
Playlist of videos pulled from this storage unit - youtube.com/playlist?list=PLAxCQOFSKoRJDgDfmMR2JWydENUHhdq2Q
Thanks to @GadgetUK164 for his help and advice while working on this one.
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Chapters
00:00 Intro
00:40 What to do with the case
01:25 Does it still work
01:59 Joypad with problems
04:15 Checking on the case
04:34 New cable for the joypad
07:56 Everdrive with a weird issue
12:56 Voltage regulator heatsink
14:34 Back in the case
17:22 Testing again with hu card and everdrive
18:10 Has it fixed itself?
22:13 While the irons out...
24:00 Does it still show corruption?
25:12 Remember the mod from part 1?
27:56 Touching up the cart PCB
28:49 Conclusion
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:39 What's in the box
03:05 Quick look at the PSU
04:22 Opening the 600
06:21 Everything we need to fix
07:40 Getting started
10:05 Potential disaster
11:20 Actual disaster
13:07 How NOT to repair lost pads
14:30 C612
15:27 A better fix and the correct caps
18:00 Recap complete
19:30 Repairing the drill damage
21:59 Does it work?
22:40 Testing the floppy drive
23:30 Amiga Test Kit
25:01 Keyboard
26:25 Floppy drive
30:44 PSU
34:32 Conclusion and credits
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:20 Looking around the system
02:39 What's the symptoms
08:47 It has to be the PLA
10:42 Testing the VIC
11:32 Anything getting hot
12:45 Probing the MOS logic
15:23 Why is U15 not being enabled?
20:15 Replacing U15
21:06 Diagnostics
22:32 More problems?
23:07 Refinishing the edge connectors
24:44 Testing again
25:25 4066
26:22 Keyboard test
27:19 Loading a game
29:08 Conclusion and credits
Make sure to check out Ginger Hippy Gaming's channel as he has looked at many systems that were pulled out of this place. the other 5 PC engines are going to various other channels and I'll update this description as those videos are released.
Video footage from both @gingerhippygaming7962 and @RMCRetro used with permission.
Massive thanks to Aergan (Simon) for all his help with this one. He has a fantastic knowledge of the PC Engine. Check out his wordpress here - aergan.wordpress.com/?s=pc+engine
Playlist of videos pulled from this storage unit - youtube.com/playlist?list=PLAxCQOFSKoRJDgDfmMR2JWydENUHhdq2Q
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:21 Look around the outside
01:45 Getting inside
03:21 Removals
08:22 Time for a bath
13:03 What's next
14:28 Reflow time
16:57 Any trace damage?
18:10 The switch
20:22 Solder montage
21:20 First test
25:23 AV cable
27:45 Video test
29:38 Yellow wires
32:02 Undoing a previous mod
32:58 Another test
34:03 Conclusion and credits
Not just as bad as some but the battery has spread its contents over a fair bit of the board and there is some damage to repair but that's not the only surprise this machine is hiding. Something called an Vortex AT-ONCE is hiding in the CPU slot and Gary looks like he's made a tower to escape the battery poison.
Featuring the voice talents of @MoreFunMakingIt and @RoseTintedSpectrum. Make sure to check out both their fantastic channels.
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:36 Lifting the lid
03:53 Testing the chipset and accessories
06:52 Assessing the battery damage
10:26 Inspection after the cleaning
12:10 Removals
13:58 Dealing with the corrosion, breaks and exposed copper
17:23 Trace repair
18:34 Recap A500+
22:21 Recap PSU
23:35 Testing U10, U11, U12, U13
26:28 First test
28:34 Vortex ATonce investigation
32:49 Vortex ATonce testing
37:07 Will it run a game?
39:59 Did it need recapped?
44:01 Conclusion
46:02 Credits
46:51 The silly bit
Thanks to @GouldFishOnGames for the donation of the VLB card, it performs fantastically in this machine. Make sure you go check out his channel here - youtube.com/@UC5Ee7qQWiSZDcdTnXB6fBfw
@philscomputerlab ESS1868F review - youtube.com/watch?v=fWOdIuRO5fI
Dos benchmark pack - philscomputerlab.com/dos-benchmark-pack.html
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:35 Cache investigation and repair
10:35 Installing the other upgrades
14:09 Discovering a problem
18:54 Is VLB faster
20:28 Games - Duke3D
23:58 Games - Doom 2
24:56 Games - Quake
27:43 Games - Transport Tycoon
31:11 Conclusion and credits
Thanks to Lee from @MoreFunMakingIt for sending me the composite mod for the ZX81 along with same for the Atari 2600 and a Kung Fu cart for the C64! Make sure to go check out his channel and don't forget to say CRG sent you :) youtube.com/@UC5WFTrin8VTv397vQIA8mcA
AliExpress oscilloscope - aliexpress.com/item/1005005368374529.html
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
01:02 First look and unboxing
04:57 PSU test
06:26 Opening the ZX81
07:13 Look around the ZX81 board
08:35 Powering up
09:55 Testing with the scope
13:06 Composite mod and thanks to @MoreFunMakingIt
19:22 What's on the screen
19:44 More scope tests
22:39 Down the ram rabbit hole
26:41 Swapping the CPU
28:52 Keyboard test and repair
32:12 Will it load something?
34:05 Ear input repair
35:28 Will it load something now?
40:01 Conclusion and credits
The GBS to A2000 board can be found here - pcbway.com/project/shareproject/Amiga_2000_Video_Card___Adaptor_for_mounting_GBS8200_internally.html
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
01:59 Picture from GBS8200
04:58 GBS Control installation
05:34 Programming
07:27 Wiring
11:05 Testing
13:29 C11 mod
16:09 Admission
17:10 Faulty GBS?
19:01 Testing
21:14 RGB pots and sync mod
26:54 Testing
27:18 SI5351 clock generator mod
29:03 Testing
29:46 Power supply bypass caps mod
32:19 Testing
32:51 A2000 video port mod
37:25 Testing
38:54 Comparing GBS8200 to GBScontrol
40:30 Conclusion and Credits
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapter
00:00 Intro
01:40 House keeping and its an ACER
04:00 Trying the ACER bios
07:38 ACER bios setup
09:23 Enabled the cache
10:35 Trying to boot from floppy
11:21 Testing the cache
13:45 CPU Check, DX2 50?
17:17 Tried everything
18:58 EISA configuration tool
24:35 Trying the SCSI HDD
28:53 Taking a look at the door
31:10 Conclusion and credits
It currently doesn't power on so lets see if it can repaired and lets see what's inside this mammoth case.
If anyone has a copy of the configuration disk for this machine, I would be forever grateful to get a copy!
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:33 Quick look around the outside
02:32 Looking around the inside
03:46 Expansion cards
07:00 Motherboard
08:24 Faulty PSU?
10:59 Drives
15:36 Trying the board
17:24 Repairing the motherboard
21:02 Trying the board again
22:59 Looking through the BIOS
25:33 Trying to boot
29:23 Cache?
32:19 Conclusion and Credits
So let's see if we can figure out why this newly built board won't boot. Can we figure out what simasimac is... can we even decide how to pronounce it properly...
SE/30 schematics - github.com/mishimasensei/macse30mlb
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:55 Testing the new board
02:54 Simasimac
03:37 Could it be a bad rom simm socket?
05:18 Could it be the ram?
05:38 Could it be poor connection?
08:20 After some reading
10:16 Back to basics, reset, clock
13:41 Could it be the chipset?
17:58 Reflow the sockets and refinish the chips
20:50 A problem
21:45 Another test
25:33 Swapping the expansion port
29:30 Trying to boot with some odd behaviour
31:42 Final test and look at the goodies
35:14 Conclusion and credits
But after a little shopping on Aliexpress and eBay I aim to put that right with a new screen, a new thumbstick d-pad replacement and since we're at it, how about a new case and set of buttons.
The aliexpress screen I bought is no longer stocked so I can't link it but plenty others are available that look similar. Just make sure to save the instrcutions.
Retrosix eBay store for the other parts - ebay.co.uk/str/retrosix
Retrosix youtube @RetroSix
Dudley of Yesterzine youtube @Yesterzine
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
Music - Lorraine's Friends and Cathode Ray Gun by @Momentvm
Chapters
00:00 Intro
00:39 Other goodies
01:42 Screen parts
03:00 Where's the instruction
04:03 Removals
07:24 Installing the new screen
12:53 Screen test
14:02 Installing the thumbstick
17:55 New case
23:23 Final tests
27:11 Conclusion and credits
Let's be honest though I'm well and truly invested into the pursuit of having a working IIci so in one way or another I'll get a working system by the end of this...
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by @NaokisRC
Music bed - Lorraine's Friends and Some Assembly Required by @Momentvm
Chapters
00:00 Intro
00:28 Recap
01:45 New diodes
02:44 Power supply
10:13 ROMs
11:57 Checking for more damage
17:17 Admitting defeat
19:02 A new hope
20:03 The electrolytic strikes back
22:53 Return of the IIci
26:25 Another look at the other board
30:15 Cache Card
32:17 Quick look at the old HDD
35:19 Inside the old floppy drive
35:54 Conclusion and credits
Hard to turn down an offer like that so let's first see what else came with it then see if we can get it fixed.
Game Gear schematics wiki.console5.com/wiki/Game_Gear
Digital Delights eBay store ebay.co.uk/str/digitaldelights
SMS Power smspower.org
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by @NaokisRC
Chapters
00:00 Intro
00:37 What's in the bag?
01:41 Testing the condition
03:09 Tear down
07:33 Removing old caps from the main PCB
11:51 Power and sound board
13:10 Why bother?
14:08 Power and sound board
18:35 Power board repair
21:41 New caps for the sound board
23:56 Why use electrolytics?
26:45 Fitting the through hole surface
27:38 First test
29:59 Where has the sound gone?
30:34 Testing in another Game Gear
31:39 Could it be the audio amp?
34:55 What else could be faulty?
36:46 One final test
37:29 Conclusion and credits
But that's nothing we haven't done before, the MAC IIci is a great machine so let's see if I can get it work...
Or that was the plan anyway. We do make some progress in the video but ultimately I can't get it going but I think it can be fixed, in fact I'm sure of it so I'm asking for your help, if anyone out there knows their way around these machines better than me, please get in touch as I'd love to get it running.
Link to schematics - github.com/nickpunt/nubus-se30/blob/master/Schematics/bomarc/Macintosh%20IIci%20Schematic%20(bomarc).pdf
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by @NaokisRC
Music bed - Lorraine's Friends and Some Assembly Required by @Momentvm
Chapters
00:00 Intro
01:42 A tour around the case
04:37 First look at the insides
09:18 Assessing the damage
13:01 Removal of previous work and components
19:00 Starting the clean up
21:01 Assessing the damage
23:04 Closer look at the capacitor areas
24:36 How many patch wires?
29:17 Repairs
39:48 Thanks @ChrisEdwardsRestoration
40:11 First test
40:39 More damage and second test
41:16 Two weeks later...
42:36 F245s
45:32 Its not that but what's wrong now!
46:55 One last roll of the dice
48:45 I'm beaten, conclusion and credits
NEOGEO schematics - wiki.neogeodev.org/index.php?title=Schematics
NEOGEO unibios - http://unibios.free.fr/
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by @NaokisRC
Music bed - Lorraine's Friends by @Momentvm
Chapters
00:00 Intro
00:48 Closer look
04:09 Is it just the crystal?
04:38 What about the RTC chip?
08:36 Voltage levels?
11:44 Calendar error checks
17:04 The soldering bit
20:29 Unibios
27:35 Testing
31:35 Conclusion and credits
Massive thanks to Mark Brown (Supaduper) for sending us the parts needed for the composite mod along with a spare keyboard membrane.
The new video encoder is a Sony device, part number CXA2075M. To complete the mod you need a 2.61k ohm metal film 1% resistor between pins 12 and 17.
This composite mod can also be applied to the A1200 using the same parts and methods. YouTube channel @BranchusCreations has an excellent video on it here - youtube.com/watch?v=e2QI1_YjQSo
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by Naokis - @NaokisRC
Music bed - Some Assembly Required by @Momentvm
Chapters
00:00 Intro
01:29 Quick fix of the LED cables
03:01 Composite fix
04:20 A massive thank you
05:13 Composite fix
13:20 Explaining the mods for the composite fix
17:01 Chip RAM expansion build
19:30 SMD soldering time
23:10 Mini soldering montage
24:12 LED?
25:36 Mini soldering montage
26:10 Polarity for a tantalum?
26:45 Straightening up
27:21 Through hole soldering
30:20 First test
31:00 Well there’s the problem
31:48 Second test
34:55 Conclusion and Credits
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by Naokis - @NaokisRC
Chapters
00:00 Intro
00:50 Getting started
02:09 RE-CRAP
04:33 Lurking underneath
05:25 Easy decapping
06:08 What's next
07:11 Broken bits
08:55 Dodgy looking traces
10:24 What about the inputs
12:37 Repairs
15:19 Testing
17:35 Low Pass Filter
23:57 2nd button input
25:25 Composite
30:27 Keyboard
31:54 One last test
32:36 Conclusion and credits
Amiga Ireland - https://amigausers.ie/
Commodore Users Group Ireland - http://www.cugi.org
TF1260 flashing CPLD guide - http://wiki.amigaspirit.hu/index.php/TF1260_firmware_upgrade_using_a_Raspberry_Pi
Ron Nicloson speech - youtube.com/watch?v=gG_SvjO8w2o
@8bitmanshed Amiga Ireland video - youtube.com/watch?v=gOuckWHEU4c
@Djformula Amiga Ireland video - youtube.com/watch?v=xWiceBcTOws
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
End music - Modspire by @NaokisRC
Music bed - Some Assembly Required by @Momentvm
Chapters
00:00 Intro
01:25 Fitting the CPLDs
08:21 Programming the CPLDs
11:55 Let’s go to Amiga Ireland
14:25 Finishing off the build
17:50 Amiga Ireland
19:32 Back home
20:12 Why doesn’t it work
22:27 Testing
23:35 Getting hot
27:43 Workbench and sysinfo
29:55 Pushing the clock
34:26 Conclusion and Credits
Part 1 looks at the Amiga that was sent in for work, it needs to be returned so lets do that first.
If you need your Amiga recapped in the UK I recommend - retropassion.co.uk
But if you fancy doing it yourself here is a list of the caps required (for all models) - https://www.ikod.se/repairs/capacitor-lists
Thingiverse links
Rear case clips - thingiverse.com/thing:3526463
Side case clips - thingiverse.com/thing:3381904
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
CRG Discord - discord.gg/3hEzUxTxWV
End music - Modspire by Naokis - @NaokisRC
Chapters
00:00 Intro
01:17 Testing my A600
05:51 Testing the other A600
07:07 Opening up
08:30 New toy
09:18 Look what I see
13:01 Inside the floppy drive
16:10 Finally into test kit
19:19 Starting the recap
20:18 Removing the plastic bits
23:27 SMD caps
29:43 Little problem
30:41 Refitting and repairing the IDE header
32:15 Repairing the case
35:16 Rusty case
35:53 Another little problem
37:12 Final testing
38:11 Conclusion and credits
I have my own go to favourites but its always great to get recommendations for a few others so a couple of weeks back I asked that very question on twitter, what is your favourite demoscene demo. From everyone who took time to answer I have taken one recommendation and so we have 25 to get through.
Yes this is going to be a long one but its broken down in chapters for each demo.
If anyone has any more recommendations for great demoscene stuff then please let me know in the comments.
YouTube Channels who picked demos
@GadgetUK164
@AtariCrypt
@retrobitstv
@TimberwolfK
@ThisIsPete
YouTube Channels from which footage was taken
@demoscenevids
@AtariCrypt
@Oerg866
@quadrigademogroup9117
@Overdozeofthedemoscene
@KKAltair
CRG Twitter - twitter.com/YT_CRG
CRG Patreon - patreon.com/user?u=13919007
End music - Modspire by Naokis - @NaokisRC
Demos in order of appearance with YouTube and Pouet links for each.
Amiga - Enigma
youtube.com/watch?v=iGpU3DicbLQ
pouet.net/prod.php?which=394
Amiga - Desert Dream
youtube.com/watch?v=jziQBWQxvok
pouet.net/prod.php?which=1483
PC DOS - Second Reality
youtube.com/watch?v=6kxQ4f66jAU
pouet.net/prod.php?which=63
Amiga - World of Commodore
youtube.com/watch?v=u43uH-kQpzk
pouet.net/party.php?which=71&when=1992
Amiga - Mega Demo Red Sector
youtube.com/watch?v=oTmpqBn4dfA
pouet.net/prod.php?which=3119
Atari STe - We were @
youtube.com/watch?v=IFQqj9_SC7M
pouet.net/prod.php?which=66702#c749574
Symbolia by Access
youtube.com/watch?v=j8V2GDmi7Jc
pouet.net/prod.php?which=3516
PC Windows - FR-08
youtube.com/watch?v=Y3n3c_8Nn2Y
pouet.net/prod.php?which=1221
Commodore 64 - Bonzai Bromance
youtube.com/watch?v=GZ2QouXh4W8
pouet.net/prod.php?which=89371
Atari ST - The BIG Demo
youtube.com/watch?v=6_Rp6YGQzbY
pouet.net/prod.php?which=11350
Amiga - Andromeda D.O.S.
youtube.com/watch?v=wPEnyVkuUOw
pouet.net/prod.php?which=404
Scene 12
Amiga - Cebit 90
youtube.com/watch?v=O8Yd1mZqvyI
pouet.net/prod.php?which=3024
Mega Drive - Titan overdrive 2
youtube.com/watch?v=gWVmPtr9O0g
pouet.net/prod.php?which=69648
Amiga - EON
youtube.com/watch?v=iD9xk3SDSYc
pouet.net/prod.php?which=81094
PC DOS - Crystal Dream 2
youtube.com/watch?v=7mWbnVPwX4U
pouet.net/prod.php?which=462
Amiga - Interference Sanity
youtube.com/watch?v=BWYRIV8YVdk
pouet.net/prod.php?which=401
Atari ST - Sea of Colours
youtube.com/watch?v=1hvFiv2hpYE
pouet.net/prod.php?which=65921
Amiga - Revolution
youtube.com/watch?v=aF1qZgP0Q-s
pouet.net/prod.php?which=17765
Amiga - Arte by Sanity
youtube.com/watch?v=vFh07lXfxTY
pouet.net/prod.php?which=1477
Amiga - Mental Hangover
youtube.com/watch?v=zR9a4vTuuoo
pouet.net/prod.php?which=1472
PC - Dope
youtube.com/watch?v=HtXxM0pezAs
pouet.net/prod.php?which=37
C64 - Red Storm
youtube.com/watch?v=-XHq7z81K4Q
pouet.net/prod.php?which=2407
Amiga - Hardwired
youtube.com/watch?v=OZTnR3FpUEA
pouet.net/prod.php?which=981
Atari 2600 - Chiphead
youtube.com/watch?v=1nTRMTnTeLQ
pouet.net/prod.php?which=68505
PC Windows - Still Square
youtube.com/watch?v=8qDSKtK8rbA
pouet.net/prod.php?which=60256
Chapters
00:00 Intro
01:49 Enigma (Amiga)
05:44 Desert Dream (Amiga)
09:18 Second Reality (PC-DOS)
12:52 World of Commodore (Amiga)
16:23 Red Sector MegaDemo (Amiga)
19:39 Oxygene (Atari STE)
24:07 Symbolia (Amiga)
27:36 FR-08 (PC-WIN)
31:27 Bonzai Bromance (C64)
34:24 The Big Demo (Atari ST)
36:51 D.O.S. (Amiga)
39:52 Cebit 90 (Amiga)
43:28 Overdrive 2 (Mega Drive)
47:01 EON (Amiga)
50:11 Crystal Dream 2 (PC-DOS)
53:32 Interference (Amiga)
56:59 Sea of Colours (Atari STE)
59:59 Revolution (Amiga)
01:02:41 ARTE (Amiga)
01:06:10 Mental Hangover (Amiga)
01:08:41 Dope (PC-DOS)
01:12:30 Red Storm (C64)
01:15:03 Hardwired (Amiga)
01:18:49 Chiphead (Atari 2600)
01:22:02 Square (PC-WIN)
01:25:46 Conclusion and Credits