11 Dec
2025
11 Dec
'25
12:15 p.m.
I am interested in reading these and archiving the contents.
I restore IBM 1130 systems and am archiving software to be shared with
enthusiasts and museums.
Located in Florida so shipping would be necessary. Might need to be
creative to keep the cost of shipping reasonable.
The cartridges are not sealed, thus you can open them without a clean room.
The plastic hardens over the decades and it is not uncommon to have the
springy metal plate detach. It would be important to get the detached ones
out of the cartridge otherwise they could scratch the recording surface and
ruin the disk.
These have eight sector marks per rotation although the IBM 1130 hardware
skips every other mark to use these as a four sector disk.
Carl
11 Dec
11 Dec
2:44 p.m.
New subject: IBM 2315 Cartridges (Paul Koning)
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.
7:41 p.m.
New subject: IBM 2315 Cartridges (Paul Koning)
I have an 1130 firmware from a group at Purdue which
is supposed to run 1130 code on an Microdata 1600.
the Microdata was developed by Alan Shapiro and Max
Malone, et.al., but had inputs from the Data machines
people who were bought by Varian. there are a lot of
similarities there.
I'd appreciate your listing and any guidance on what
I need to add to my emulator to run and support the
1130. Of course will have to analyze what the firmware
needs as well. I can do a card reader, punch, paper tape,
punch. Already have consoles emulated along with printer,
tape and disk.
I'd be glad to share with you, but plan to share my emulator
which will have the Microdata 1621 and this firmware
thanks
Jim
On 12/11/25 14:44, Van Snyder via cctalk wrote:
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.
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Carl Claunch -
jim stephens -
Van Snyder