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@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.
