Uploaded May 2023 | Updated September 2026, 2 weeks ago
My AMD 386 DX-40 is sad. It only has access to 8MB of memory. The motherboard this CPU is soldered to supports up to 32MB utilizing all 8 memory slots. Join me in today's episode where I will create 4 SIMM modules with 4MB each. At the end of this project, the AMD CPU will have access to 16MB, but there is a catch:
I only have EDO memory chips...
Sponsored by PCBWay: pcbway.com/g/lF253I
PCBWay provides full feature custom PCB prototyping services, 3D printing, and much more. Check them out using my referral link above and get a 5 USD welcome bonus when you sign up as a new customer!
Order the 3dfx Voodoo Memory Mod (Revision 1.1) from PCBWay directly:
pcbway.com/project/shareproject/Guillemot_MAXI_Gamer_3D_3Dfx_Voodoo_Memory_Expansion_Board_REV_1_1_736bec60.html
Repository with Gerber files and other useful items for Voodoo Memory Mod (Revision 1.1):
github.com/BitsUndBolts/3Dfx-Voodoo-Memory-Mod
UpLateGeek Memory Module Design/Gerber:
github.com/UpLateGeek/Let-s-Make-Some-Memories
Soldering iron (FNIRSI HS-01):
https://s.click.aliexpress.com/e/_oBq2cj9
You can support me on Patreon:
patreon.com/BitsUndBolts
00:00 Intro
01:15 Requirements
03:21 PCBWay
03:56 Assembly
05:17 Why EDO may work
06:48 First test
07:00 Debugging
07:59 Drops of knowledge
11:00 Mod EDO to FPM
12:25 Retest
13:47 Conclusion and future projects
My AMD 386 DX-40 is sad. It only has access to 8MB of memory. The motherboard this CPU is soldered to supports up to 32MB utilizing all 8 memory slots. Join me in today's episode where I will create 4 SIMM modules with 4MB each. At the end of this project, the AMD CPU will have access to 16MB, but there is a catch:
I only have EDO memory chips...
Sponsored by PCBWay: pcbway.com/g/lF253I
PCBWay provides full feature custom PCB prototyping services, 3D printing, and much more. Check them out using my referral link above and get a 5 USD welcome bonus when you sign up as a new customer!
Order the 3dfx Voodoo Memory Mod (Revision 1.1) from PCBWay directly:
pcbway.com/project/shareproject/Guillemot_MAXI_Gamer_3D_3Dfx_Voodoo_Memory_Expansion_Board_REV_1_1_736bec60.html
Repository with Gerber files and other useful items for Voodoo Memory Mod (Revision 1.1):
github.com/BitsUndBolts/3Dfx-Voodoo-Memory-Mod
UpLateGeek Memory Module Design/Gerber:
github.com/UpLateGeek/Let-s-Make-Some-Memories
Soldering iron (FNIRSI HS-01):
https://s.click.aliexpress.com/e/_oBq2cj9
You can support me on Patreon:
patreon.com/BitsUndBolts
00:00 Intro
01:15 Requirements
03:21 PCBWay
03:56 Assembly
05:17 Why EDO may work
06:48 First test
07:00 Debugging
07:59 Drops of knowledge
11:00 Mod EDO to FPM
12:25 Retest
13:47 Conclusion and future projects
