MIT provides MULTICS source and documentation (DPS-8 simulation)
Roy J. Tellason
rtellason at verizon.net
Wed Nov 14 22:29:59 CST 2007
On Tuesday 13 November 2007 18:17, Cameron Kaiser wrote:
> > An even better example is the C-64. The disk drives on that are
> > netoriously slow, but were computers in their own right, having a CPU as
> > part of the drive electronics. One trick (assuming you have at least two
> > disk drives) was to program the disk drives to copy a disk,
> The 64 was emblematic of the best and worst features of this. The
> intelligent serial peripherals could talk amongst each other, such as
> the disk drive becoming commanded to TALK and the printer to LISTEN,
> which is essentially a print spooler.
This reminds me of one particular disk-copying program, which would have the
lights on both drives on solid. You could, once you'd kicked off a copying
process, have unplugged the computer and it would just keep on going.
> On the other hand, there was the 6551 ACIA emulation in software for
> the user port, which was buggy to boot. People may make fun of the Plus/4
> but at least it had a real ACIA.
They did? (Looking in handy box of manuals, but plus 4 isn't in there...)
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