Just wanted to share a new board for the Macintosh Portable RAM Expansion.
The BOM is available and pricing listed. Biggest expense is the RAM. Does need a Tigard or similar CPLD programmer. I have not tested it on a M5126. I did use some small resistors (0402, man those are small - I did have a microscope) -- could easily make them larger for soldering by editing the pcb.
This is the link...
RAM Expansion Card Git
Enjoy.
- Uses the RAM slot.
- Configuration to include sequential RAM addition from 2, 4, 6 and 8 RAM.
- Mode select for Portable Model (M5120 or M5126 - backlit limited to 7 MB total).
- Drives DTACK on pin 7 of the PDS slot with easy header for wire -- avoids slow downs.
- Configurable CPLD and firmware.
- Fancy LEDs too!
The BOM is available and pricing listed. Biggest expense is the RAM. Does need a Tigard or similar CPLD programmer. I have not tested it on a M5126. I did use some small resistors (0402, man those are small - I did have a microscope) -- could easily make them larger for soldering by editing the pcb.
This is the link...
RAM Expansion Card Git
Enjoy.
