website/content/museum/imsai-pcs-80.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
IMSAI PCS 80	Computers	Professional Computer	U.S.A.	1977	Intel 8080 - IMSAI PCS 80	name image company company_name specs tabs photos comments oc_id source PCS 80 /media/museum/photos/imsai0.jpg /companies/imsai IMSAI label value NAME PCS 80 label value MANUFACTURER IMSAI label value TYPE Professional Computer label value ORIGIN U.S.A. label value YEAR 1977 label value BUILT IN LANGUAGE None label value KEYBOARD Video terminal label value CPU Intel 8080 - IMSAI PCS 80/30 came with label value SPEED 3 MHz label value RAM 2.25 KB (up to 64 KB thanks to RAM boards, there are 4K, 16K, 32K and 64K memory expansion boards). label value ROM 3 KB (Including monitor) label value TEXT MODES 12x40, 12x80, 24x40 and 24x80 (128 characters of either 5x7 or 7x10 dot matirx fonts) label value I/O PORTS Serial ports (2) - Parallel Port (1) - Monitor - S100 Bus (8 expansion slots) label value OS 8K DOS based upon CP/M label value POWER SUPPLY built-in 28AMP power supply unit label value PERIPHERALS Floppy drives inteface, Single or dual 8'' drives in a separate housing same size as main frame unit photos title subtitle text image THE PCS-80 COMPONENTS /media/museum/photos/imsai_pcs80_components_1.jpg title subtitle text image THE PCS 80 MODEL 15 /media/museum/photos/imsai_pcs80_model15_1.jpg title subtitle text image THE PCS-80 MODEL 30 /media/museum/photos/imsai_pcs80_mod30_1.jpg author date text Lawrence Shadai (United States) Tuesday 31st December 2019 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. author date text j4kc (a) Wednesday 6th April 2005 yes, they used an IMSAI in war games but not this one, they use the 8080 author date text Matt (Earth) Tuesday 21st December 2004 Did they use this kind of computer in War Games ?\ Would like to know because I saw a IMSAI floppy system. Thanks,Matt 342 url date https://web.archive.org/web/20230608155226/http://www.old-computers.com/museum/computer.asp?c=342 2023-06-08

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.