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I > IMSAI  > PCS 80   

PCS 80

The PCS 80 came with a lot of peripherals: line and character printers, CRT terminals, intelligent keyboards, ACR storage, 8" and 5.25" floppy disks and with several languages: TTY BASIC with OS, 4K, 8K and 12K BASIC, audio cassette BASIC with OS, & a scientifically oriented disk BASIC and level 2 Fortran IV compiler.

Greg Bober stil have an extended working configuration including:
• External 5.25" quad density 380Kb Micropolis floppy with BASIC,
• Faster memory & "I" tempgrade CPU, speed could goto 7MHz,
• 58K 10MHz RAM,
• Custom boot operating system,
• 64K of extended RAM/ported PROM containing the DOS & BASIC operating system to have 1 second versus 30 second floppy boot up,
• Extrernal 12" monitor since 24x80 is hard to see on tiny screen,
• Spare parts.
Numerous photos of his system may be seen here.

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


IIRC: A heavily modified PCS-80 was used by Rob Barnaby to develop WordStar. Modifications (as I can best tell) included an inverse video board ("Black on White" instead of the regular "While on Black") and 5.25 Inch dual floppy disks with an external monitor. Currently located at DigiBarn, it no longer has the inverse video board. I could be mistaken, but this looks like the very same model.

Tuesday 31st December 2019
Lawrence Shadai (United States)

yes, they used an IMSAI in war games but not this one, they use the 8080

Wednesday 6th April 2005
j4kc (a)

Did they use this kind of computer in War Games ?
Would like to know because I saw a IMSAI floppy system. Thanks,Matt

Tuesday 21st December 2004
Matt (Earth)


TYPE  Professional Computer
YEAR  1977
KEYBOARD  Video terminal
CPU  Intel 8080 - IMSAI PCS 80/30 came with
RAM  2.25 KB (up to 64 KB thanks to RAM boards, there are 4K, 16K, 32K and 64K memory expansion boards).
ROM  3 KB (Including monitor)
TEXT MODES  12x40, 12x80, 24x40 and 24x80 (128 characters of either 5x7 or 7x10 dot matirx fonts)
I/O PORTS  Serial ports (2) - Parallel Port (1) - Monitor - S100 Bus (8 expansion slots)
OS  8K DOS based upon CP/M
POWER SUPPLY  built-in 28AMP power supply unit
PERIPHERALS  Floppy drives inteface, Single or dual 8'' drives in a separate housing same size as main frame unit

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Ready prompt
ZX Spectrum
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Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
Pixel adventure
Vector ship

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