Hey Birt! | Casio VX-4 RAM expansion -Part 1: Easy 32K internal upgrade to FX-870 spec @HeyBirt | Uploaded March 2022 | Updated October 2024, 1 hour ago.
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This is a first of a two-part series covering memory expansions for the Casio VX-4 pokecon. The VX_4 was an educational market version of the FX-870P sold only in Japan. In this video we will replace the internal 8K SRAM with a 32K part taking the VX-4 up to the spec of the FX-870P. We’ll cover the parts swap and how to properly reset the computer and then use an originally undocumented self-test feature to check the RAM upgrade.
In the second part we’ll build a Casio RP-33 32K RAM upgrade module clone and also cover the design process. We started with a big push by a few friends and learned some about working with Zebra strips along the way.
The RP-33 design files are on my GitHub: github.com/Jeff-Birt/Casio_VX-4_RAM_Upgrade
Timeline:
00:00 – Welcome
01:31 – Disassembly
10:22 – Installing the new SRAM
15:36 – Reassembly
21:08 – Batteries and testing
24:08 – Wrap up, Thanks!
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Links
VX-4 Repair video #1: youtu.be/wpbwxjeGzUI
VX-4 Repair video #2: youtu.be/o0a6JhiZ1Gk
Icelord’s website: icelord.net/wordpress/archives/17133
Japanese Pokecon site: lsigame.com/pb-1000/technote/mem32k/mem32k.htm
Amazon Associated Links:
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Uxcell shrink wrap: amzn.to/3boKJEd
NiMh tabbed cells: amzn.to/3nHCbxL
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Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators youtu.be/ujIMRIJ1JG8
Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at pcbway.com
PCBWay Article Submission: pcbway.com/blog/Activities/Submit_for_Publication___Now_I_Write_Articles_in_PCBWay.html
This is a first of a two-part series covering memory expansions for the Casio VX-4 pokecon. The VX_4 was an educational market version of the FX-870P sold only in Japan. In this video we will replace the internal 8K SRAM with a 32K part taking the VX-4 up to the spec of the FX-870P. We’ll cover the parts swap and how to properly reset the computer and then use an originally undocumented self-test feature to check the RAM upgrade.
In the second part we’ll build a Casio RP-33 32K RAM upgrade module clone and also cover the design process. We started with a big push by a few friends and learned some about working with Zebra strips along the way.
The RP-33 design files are on my GitHub: github.com/Jeff-Birt/Casio_VX-4_RAM_Upgrade
Timeline:
00:00 – Welcome
01:31 – Disassembly
10:22 – Installing the new SRAM
15:36 – Reassembly
21:08 – Batteries and testing
24:08 – Wrap up, Thanks!
Please consider clicking on the Subscribe button below and then click the bell icon. That way you will be notified when I post a new video. Thanks!
Help support Hey Birt!
heybirt.com - merch
paypal.me/HeyBirt
patreon.com/heybirt
subscribestar.com/hey-birt
Hey Birt! On Social Media!
Facebook:
Soigeneris: facebook.com/Soigeneris-295527583797729
Hey Birt!: facebook.com/HeyBirt
Twitter:
Hey Birt!: twitter.com/HeyBirt?lang=en
Links
VX-4 Repair video #1: youtu.be/wpbwxjeGzUI
VX-4 Repair video #2: youtu.be/o0a6JhiZ1Gk
Icelord’s website: icelord.net/wordpress/archives/17133
Japanese Pokecon site: lsigame.com/pb-1000/technote/mem32k/mem32k.htm
Amazon Associated Links:
Spudger set I use: amzn.to/3z19pM7
CiaKot: amzn.to/3CvVKiY
Overcaot Pen: amzn.to/3s439Bt
Novus Plastic Polish: amzn.to/2VwtFaV
3M Double sided tape: amzn.to/3rYCxBX
Heat mats: amzn.to/3boKDwl
Uxcell shrink wrap: amzn.to/3boKJEd
NiMh tabbed cells: amzn.to/3nHCbxL
uxCell strain reliefs: amzn.to/3nJ5AaP
Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators youtu.be/ujIMRIJ1JG8
