Click Here to visit our Sponsor
The Latest News ! The History of Computing The Magazine Forums Collectors corner Have Fun there ! Buy books and goodies
  Click here to loginLogin Click here to print the pagePrinter ViewClick here to send a link to this page to a friendTell a FriendTell us what you think about this pageRate this PageMistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine

Sharp

X68000 XVI
Browse console museumBrowse pong museum









 

Commodore VIC-20 goodies !

see details
MZ-700 goodies !

see details
Oric Atmos goodies !

see details
Amstrad CPC-464 goodies !

see details
READY prompt goodies !

see details
Apple II goodies !

see details
Atari ST bomb icons goodies !

see details
1kb memory only...sorry goodies !

see details
H.E.R.O. goodies !

see details
www.old-computers.com logo goodies !

see details
Destroy all humanoids ! goodies !

see details
Atari ST bee icon goodies !

see details
Amiga Workbench goodies !

see details
Back to the roots goodies !

see details
Commodore 64 boot screen goodies !

see details
Commodore 64 goodies !

see details
MSX Retro Gamer goodies !

see details
Pixel adventurer goodies !

see details
I love my Oric-1 goodies !

see details
Horace is not dead goodies !

see details
Space Invaders - Retro Gamer goodies !

see details
Space Invaders goodies !

see details
ZX Spectrum goodies !

see details
Odyssey 2 / Videopac sprites goodies !

see details
Odyssey 2 / Videopac Select Game prompt goodies !

see details
Camputers Lynx logo goodies !

see details







X > XEROX  > 820-II     


Xerox
820-II

The model 820-II is basically a model 820 with a higher clock rate (4 MHz instead of 2.5 MHz) and a 8" double density/double side disk-drive and hard-disk instead of the the two basic 8" Single density/single side disk-drive of the first model 820. But the hard-disk is said to be very noisy and the dual disks weigh more than 38 pounds!

Nearly all the hardware is housed within the monitor, a bit like a Macintosh. The separate keyboard is linked to the monitor by a "not-long-enough" cord. The 8" disk-drive and hard-disk are mounted in a separate huge box. The 10MB hard drive for example was boxed with an 8" drive. A real-time clock is included in the hardware. Green screens were available in all models since the screen/processor case was common to all.

Like its predecessor, the 820-II is well furnished in software of all sorts. Thanks to its CP/M compatibility nearly every profession can find a suitable program. A lot of languages and OS were also available (CP/M, Basic 80, C Basic 2, Assembler Macro 80, Cobol 80, Short 80, TTY communication, 3270/3780 emulation).
But the 820-II has no real graphic possibilities nor sound, and a small RAM capacity (64 KB) for a professional computer. Above all it was quite expensive compared to its competitors.

There was also WP dedicated versions with unique key caps.

A 16-bit expansion board was released to upgrade the 820-II, so that its performance would nearly match the new Xerox computer(the 16/8), and also allowed the 820 to work under DOS. At the start of the year 1985, Xerox would definately leave the micro-computer market and stop the production of the 820.

___________

Contributors: Jeremy Wilcox, Bronislaw Opacki Jr

Dale Carpenter clarifies:
I started working for Xerox in 1983 as a PC tech in the Xerox Service Center a sevice/support part to the retail store they had back then.
820-II's were the next step after 820's they were already double density instead of upgraded like many 820's were. They also supported double sided drives.
The drive choices were 5.25" dual drives single or double sided, 8" dual drives also single or double sided and the top was a 8"double sided floppy paired with a 8" 10Mb Shugart hard drive.The 8" double density, 2-sided floppies had a capacity of 960K which was a lot for back then.


ShareThis


 

Miles Attacca (USA): Swap pins 2 and 3 on the rs232 cable. Terminal mode will work fine. If needed you can adjust the speed of the port (I think "B" is the command? You can hit the help key for the basic functions list). I used mine as a terminal and also to move files between machines often. $arun

          
Saturday 17th May 2014
Arun Baheti (Los Angeles, California, USA)
Arun Baheti

The 820-II and 16/8 are where I cut my teeth in computing (started with a -I and got upgraded). The -II did add some graphic capabilities over the -I, and we were able to run some (then) cutting edge graphics programs for business graphing (as add ons to dBase) and even print them on the daisy wheel Diablo 630 printer. There were also a surprising array of graphics oriented games, but limited by the block graphics which made more sense for business applications.

I had the 8" drive system, and eventually got a hard drive (Shugart sa1004 maybe?) that was a whopping 10meg. I still have technical manuals and software on 5" and 8" disk $ somehow I can''t part with them as momentos even though the computers were passed on long ago.

I''d love to get my hands on one to play around a little bit.

          
Saturday 17th May 2014
Arun Baheti (Los Angeles, California, USA)
Arun Baheti

I did some programming for Xerox in the 80''s. A user friendly form maker for the laser printer 2700. One of the first tihing I did was to connect an on/off button for the disk drives. Now, after I have downloaded some documents that was unknown for me earlier, I had to do a reunion with my 820-II. I love block graphics! My challenge is to make the best block graphics program ever. /Mikael

          
Friday 2nd May 2014
Mikael Larsson (Sweden)

 

NAME  820-II
MANUFACTURER  Xerox
TYPE  Professional Computer
ORIGIN  U.S.A.
YEAR  1983
END OF PRODUCTION  1985
BUILT IN LANGUAGE  Basic 80 delivered on disk
KEYBOARD  AZERTY/QWERTY, full-stroke keyboard with separated keyboard, 74 keys
CPU  Z80A
SPEED  4 Mhz
RAM  64 kb
ROM  8 kb
TEXT MODES  80 x 24 (character matrix : 5 x 7)
12'' black & white monitor
COLOrsc  Black & white
SIZE / WEIGHT  Main unit / monitor : 32,8 x 38,1 x 34,3 cm / 13,6 kg
I/O PORTS  Serial 9600 bauds, Internal Expansion Slot, External Floppy Connector
BUILT IN MEDIA  one 8'' disk-drive (DD/DS) (320 KB) and one 8'' hard-disk (10MB).
OS  CP/M 2.2
POWER SUPPLY  Built-in PSU
PERIPHERALS  Additional disk-drives, printer, modem, 16-bit board
PRICE  9832 (France, 83)





Google
 
Web www.old-computersc.com


 

More pictures
Adverts
Hardware Info
Documentations
Mini-Forum

Click here to go to the top of the page   
Contact us | members | about old-computers.com | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -