I bought this assembled and ready to run board from Retrospy Technologies.
SMD technology, so small and of high quality.
Description from the Retrospy store:
The KIM-1 RAM/ROM board is a custom board than expands the memory of the KIM-1 single board computer.
Features
- Can provide 8k blocks of RAM or ROM between 0x2000 & 0xFFFF
- Fills in the KIM’s missing RAM between 0x0400 and 0x13FF
- 2 pages of DIP switch selectable ROM, upgradeable to 4 or 8 with a 39SF020 or 39SF040
- Includes a pre-programmed 39SF010 containing 2 pages of common KIM-1 configurations (Xkim for SD Card, Eduardo Casino’s Xkim with support for IEC/1541 drives)
- Backwards compatible with Corsham Technologies’ KIM-1 I/O Board
- Includes full color manual and 2×5 pin IDC cable.
Inspiration taken from a design by Bob Applegate of Corsham Technologies, LLC.
This board can be added to any KIM-1 system, but the easiest way to add it is with the Retrospy or Corsham I/O Board. This board comes with a ribbon cable that plugs right into the I/O Board with no mess. By default the DIP switches are set so your KIM will have 5K of RAM from $0000 to $13FF and from $2000 to $DFFF. The extended monitor is from $E000 to $FFFF.
For PAL-1 users with the PAL-1 Motherboard Expansion Kit
– the RAM RAM between 0x0400 and 0x13FF is already on the PAL-1 board, leave that open.
– The usual PAL-1 configuration has ROM at A000-B000, the PAL-1 ROMs are made for that location
– Without the KIM-1 I/O card, just put a Dupont male-female wire between Pin 10 of the “To KIM” connector to Decode Enable of a motherboard connector or K of a KIM-1 Connector expander.