4 Jan
2013
4 Jan
'13
10:02 p.m.
Tim Shoppa wrote:
I'm sure somebody here did it. 5150 with a CM153
card for Philips
CM100 player?
I lost track of the thread somehow, so I'm not sure *what* somebody here
did.
I have some CM100 players but no CM153 cards. I think the player is
equivalent to the DEC RRD50, so it should also work with a KRQ50 (M7552)
for a Qbus system, but I don't have one of those either.
Some years back I reverse-engineered two versions of the CM100 firmware
(8051). The interface uses DA15 connectors with four EIA-422
differential pairs. If they had made the interface only a *tiny* bit
different, they could have supported eight CM100 drives on a single host
adapter.
The CM110 is the same drive with an additional board that interfaces it
to SCSI, but I've never gotten my hands on one.
Eric