Intergraph Clipper Workstations

Just as an addendum to the last post, here is a list of all the Intergraph Interpro workstation models with a Clipper CPU.

We start with the earliest models:

Model Year of Introduction CPU
32C 1986 C100
120 1988 C100
125 1989 C100
220 1988 C100
225 1989 C100
340 1988 C100
360 1988 C100

From about 1989, Intergraph introduces a systematic naming scheme. It is described as a comment in the MAME emulator code in the Reference section. It follows an ABCD format:

  • A: case type (2=desktop, 6=minicase)
  • B: CPU type (0=C300, 4=C4T, 6=C400?, 7/8/5 = C400I)
  • C: graphics type (0=none, 3/5=GT, 4=EDGE-1, 8 = EDGE-2)
  • D: usually 0, 6xxx systems have 5, 7 and 9 options (backplane type?)

Graphics type 3 is for GT graphics fitted to a 2xxx system, and type 5 when fitted to a 6xxx system.

This scheme allows you, in principle, to generate all possible model numbers. However, of course, the CPUs and the graphic options developed over time and older options were not necessarily offered later on.

These are the models that I could find in the literature:

Model Year of Introduction CPU
2020 1991 C300
2430 1992 C400
2730 1993 C400
2830 1994? C400
3050 1989 C300
3070 1989 C300
6040 1990 C300
6080 1990 C300
6240 1990 C300
6280 1990 C300
6450 1992 C400
6480 1992 C400
6750 1993 C400
6780 1993 C400
6850 1993 C400
6880 1993 C400

Now, if you read the above scheme carefully and compared it to the list above, you can see that the scheme is missing some values. First, there seems to be a short-lived “3” case type. Second, there is an unkown CPU type “2”, obviously also a C300. Third, two unknown graphics options “0” and “7”.

Finally, I assume that the CPU type “8” is a C400 that runs on 50 MHz instead of the 40 MHz of the “7” models.

References

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