1 Nov
2024
1 Nov
'24
12:55 p.m.
Wikipedia lists models 60, 62, 64, and 66 (never shipped)
and 65 and 67 as shipped, but no 63.
since I don't remember 65s, I assume not many of them made it out the door?
https://en.wikipedia.org/wiki/IBM_System/360
<pre>--Carey</pre>
On 11/01/2024 1:12 PM CDT Van Snyder via cctalk
<cctalk(a)classiccmp.org> wrote:
On Fri, 2024-11-01 at 11:01 -0700, David Barto via cctalk wrote:
> > The 6502 had a HCF (halt and catch
fire) undocumented
> > instruction.
> > I forget the opcode and if you knew what you were doing you could
> > get the instruction executed on the chip using any assembler.
Early in 1965 Caltech installed one of only a few 360/63 computers.
After they installed it, they discovered that the default instruction
when it started up was HCF. It was replaced with a 360/67.