11 Dec
2025
11 Dec
'25
2:44 p.m.
On Thu, 2025-12-11 at 13:15 -0500, Carl Claunch via cctalk wrote:
I restore IBM 1130 systems and am archiving software
to be shared
with
enthusiasts and museums.
As my senior undergraduate project in 1974, I wrote microcode to
convince a Varian V73 that it was really an IBM 1130. The university
had replaced an aging 1130 with the V73 and then discovered that Varian
didn't have a COBOL compiler. Back then, they still wanted to teach it.
I have the microcode, but I only got a listing, not the electrons, for
the I/O support running in 620f mode. The Computer History Museum has
the listing. If anyone is interested I can send the microcode and flow
diagrams for it.