21 Nov
2002
21 Nov
'02
7:17 p.m.
I have managed to latch on to one of the above cards... the sticker on
one chip says its a Model CDU-720/TM (sn 2127 BOYA8) and two ROMS have
F720Y1A8 and 2A8 respectively. Board copyright is 1989 (in copper) and
the silkscreening says 1991 - most of the chips are from '91. It is
single-ended only; the differential section is not populated.
I have yet to do any Googling, but if anyone has anything on this... I
know a nice friendly 11/44 system (sitting to my immediate left) that
would dearly love to be able to read CDROMS, SCSI disks, etc....
Cheers
John
21 Nov
21 Nov
7:33 p.m.
John Lawson wrote:
I have managed to latch on to one of the above
cards... the sticker
on
one chip says its a Model CDU-720/TM (sn 2127 BOYA8) and two ROMS have
F720Y1A8 and 2A8 respectively. Board copyright is 1989 (in copper) and
the silkscreening says 1991 - most of the chips are from '91. It is
single-ended only; the differential section is not populated.
Nice find! Since it's a /TM, it can talk to both tapes and disks. It
needs to be configured for one CSR address for MSCP, and another for
TMSCP.
I have yet to do any Googling, but if anyone has
anything on this...
http://www.brouhaha.com/~eric/retrocomputing/cmd/cdu-722.txt
I
know a nice friendly 11/44 system (sitting to my immediate left) that
would dearly love to be able to read CDROMS, SCSI disks, etc....
CD-ROM drives will probably have to be jumpered for 512-byte sectors
(vs. the standard 2048). Many Toshiba and Plextor SCSI drives have
such a setting.
8:06 p.m.
I have managed to latch on to one of the above
cards... the sticker on
one chip says its a Model CDU-720/TM (sn 2127 BOYA8) and two ROMS have
F720Y1A8 and 2A8 respectively. Board copyright is 1989 (in copper) and
the silkscreening says 1991 - most of the chips are from '91. It is
single-ended only; the differential section is not populated.
I have yet to do any Googling, but if anyone has anything on this... I
know a nice friendly 11/44 system (sitting to my immediate left) that
would dearly love to be able to read CDROMS, SCSI disks, etc....
Try
ftp://zane.brouhaha.com/pub/dan/CMD720
I don't know about CMD boards, but with Viking boards, the ability to use
CD-ROMs depends on the revision of your ROMs. I'd also recommend initially
trying CD-ROM drives capable of 512-byte blocks.
Zane
23 Nov
23 Nov
9:30 a.m.
Hi, people,
*********** REPLY SEPARATOR ***********
On 21-Nov-02 at 18:07 Zane H. Healy wrote:
Try
ftp://zane.brouhaha.com/pub/dan/CMD720
I don't know about CMD boards, but with Viking boards, the ability to use
CD-ROMs depends on the revision of your ROMs. I'd also recommend initially
trying CD-ROM drives capable of 512-byte blocks.
FWIW: I have a CMD CQ220 series in one of my MicroVAXen. I was able to bring its ROMs to
the latest revision simply by asking CMD for the image files (gotta love that UniSite!)
You may be able to do a similar thing with your board. If you can, and you lack the
ability to program the chips, I can do so for a small fee (SHAMELESS PLUG ALERT!)
http://www.bluefeathertech.com/devices.html
Keep the peace(es).
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin(a)bluefeathertech.com
"I'll get a life when someone demonstrates that it would be superior
to what I have now..." (Taki Kogoma, aka Gym Z. Quirk)
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3 comments
4 participants
participants (4)
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eric＠brouhaha.com -
healyzh＠aracnet.com -
jpl15＠panix.com -
kyrrin＠bluefeathertech.com