2 Nov
2006
2 Nov
'06
3:52 p.m.
Hi Cosmac experts,
recently I got hands on a Cosmac 1802 Evaluation Kit Rev 2
(CDP18S020). There is a a "Cosmac CDP18S021 Micro Terminal"
as well. I want to restore this kit and would be very happy
to get hands on a user manual with schematics for this!
Google did not bring up the desired result.
In powering up the unit, the 1802 executes "Wait for DMA or
IRQ (0x00)" permanently and thus the micro terminal stays
black as well. There is a firmware ROM CDPR522 on the unit
and all datasheets are available on the www. Only the chip
labeled "RCA 640" within the micro terminal are mystic,
but a schematic might help here, too.
Any hints where to get the user manual or a copy of it?
Best regards,
Erik.