27 Feb
1998
27 Feb
'98
1:40 p.m.
I found a XEROX 820 in a trift store today. Can anyone tell me what it is?
It has a base unit with a built in monitor. It has four ports on it. One
connects to a daul 5 1/4" disks drives in an external box. Another connects
to a separate keyboard. The other two are for a serial port and printer port.
Joe
27 Feb
27 Feb
4:12 p.m.
New subject: What is this? XEROX 820
On Fri, 27 Feb 1998, Joe wrote:
I found a XEROX 820 in a trift store today. Can anyone
tell me what it is?
It has a base unit with a built in monitor. It has four ports on it. One
connects to a daul 5 1/4" disks drives in an external box. Another connects
to a separate keyboard. The other two are for a serial port and printer port.
Joe, it is a Z-80 based CP/M machine w/ 64k RAM. On power up, you are
presented with the choice of entering the monitor utility, using it like
a typewriter - assumes printer attached, or booting up on CP/M-2.2.
Probably the main drawback of the 820 vice the 820-II is that it only
handles SSSD drives. In the 5.25" models, that is about 90k of storage.
- don
donm(a)cts.com
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Don Maslin - Keeper of the Dina-SIG CP/M System Disk Archives
Chairman, Dina-SIG of the San Diego Computer Society
Clinging tenaciously to the trailing edge of technology.
Sysop - Elephant's Graveyard (CP/M) - 619-454-8412
*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
see old system support at http://www.psyber.com/~tcj
visit the "Unofficial" CP/M Weg site at http://cdl.uta.edu/cpm
28 Feb
28 Feb
5:32 a.m.
New subject: What is this? XEROX 820
It's a highly hackable machine used alot by hams in the Days of the
Ancients to talk to packet TNCs and such.
I am currently restoring one that you can see at
http://www.retrocomputing.com. It was hacked into a sturdy galvanized
steel enclosure, has a double density daughter card and dual 8" Shugart
drives. I also have a pile of spare parts as well as ALOT of
documentation and boot disks, although I haven't gotten around to booting
it up and making copies of the boot disks. I do have enough spares to
build a couple more machines if I had drives to connect to them. The
Computer Journal http://www.psyber.com/~tcj (I THINK!) had some
schematics for them in the centerfold back in like 91 or 93 if I recall.
Anthony Clifton - Wirehead
On Fri, 27 Feb 1998, Joe wrote:
I found a XEROX 820 in a trift store today. Can anyone
tell me what it is?
It has a base unit with a built in monitor. It has four ports on it. One
connects to a daul 5 1/4" disks drives in an external box. Another connects
to a separate keyboard. The other two are for a serial port and printer port.
9576
days inactive
9577
days old
2 comments
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donm＠cts.com -
rigdonj＠intellistar.net -
wirehead＠retrocomputing.com