Misuse of word "microcode" 105
What do you mean by "different microcode"? On the 360-30, you could select some options on the console and you would have a 1401 (I could be mistaken about this one). You could load in a BOS control deck, running 360 instructions, and have TWO 12K 1401s on a 32K 360-30 You communicated with it by dialing codes into the console switches and pressing a button (I wasn't a programmer then, so I didn't realy understand it). The company I worked for wrote a DOS program that would set things up, then call a local mod to the DOS supervisor to execute a diagnose and run in 1401 mode till the next interrupt. So we ran the standard 3 DOS partionns, BG, F1 and F2. F2 was only 2K, but we could invoke via the console, several copy programs, e.g. tape to printer, card to tape, card to printer. In both BG and F1 we ran the standard DOS job control system that would read jobs in from a card reader and execute them. Some were native 360 buttembler & cobol programs. Others jobs used the local program to load 1401 programs from disk files and executed them. Is that not what was meant? (I was including 7010 in the 1400 family, I thought they were similar. I know one model (40?) could emulate a 1620 and maybe some of the larger models could emulate 7094? I wasunder the impression that in practice, few machines were sold with anything but 1400 family emulation)
Do you mean a different microcode language? meaning one task would run with one microcode program following one set of rules, and then it would switch to a different microcode program written in a different microcode language? The hardware was actually in a different state so it did different things with what would otherwise be the same microinstruction?
Misuse of word "microcode" 106
George Neuner Legend has it that Apple negotiated with Motorola about putting special instructions in microcode for use by...
OT: are there ANY copies of TOS, BOS or BPS for the 360 around anywhere?
Misuse of word "microcode" 107
I haven't looked at the patents ... what I know about the 68K's internals is mostly based...