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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.

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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