RCA COSMAC 18S020 Evaluation Kit in a SWTPC 6800 case
I recently acquired an RCA COSMAC 18S020 Rev 2 Evaluation kit but it was tucked inside an SWTPC 6800 case that had been customized for it’s use. The board is fully populated with memory and has some work done to the expansion prototyping area but i haven’t yet figured out what it is. From one of the pictures I received, I thought the DB25 connector was for a terminal connection but in looking at it closer, I don’t think the pins line up to a serial connection. Thankfully, Chuck from the “cosmacelf” Yahoo group had an early Evaluation Kit manual so I helped put it together into a final MPM-203 PDF version and have the information to try to sort this out.
Below are some pictures.
- RCA COSMAC 18S020 – In SWTPC 6800 case
- RCA COSMAC 18S020 – board front
- RCA COSMAC 18S020 – Board angled
- RCA COSMAC 18S020 – CDP1802D CPU
- RCA-COSMAC-18S020-CDP1802D-CPU back
- RCA COSMAC 18S020 – Support chips
- RCA COSMAC 18S020 – Memory
- RCA COSMAC 18S020 – Board Markings
- RCA COSMAC 18S020 – Rear connector
- RCA COSMAC 18S020 – Power Supply
- RCA COSMAC 18S020 – Expansion Area Mod
- RCA COSMAC 18S020 – 20 Pin ribbon connector
- RCA COSMAC 18S020 – Expansion Area Mod 2
- RCA COSMAC 18S020 – System Connector soldered wires
- RCA COSMAC 18S020 – System Connector close up
- RCA COSMAC 18S020 – Expansion Area bottom
- RCA COSMAC 18S020 – switch connection
- RCA COSMAC 18S020 – Underside System Connector soldered wires
- RCA COSMAC 18S020 – Board Bottom
- RCA COSMAC 18S020 – Board Bottom connections 1