On Wed, Jan 9, 2019 at 12:02 PM <silverdr@wfmh.org.pl> wrote: > > > > On 2019-01-09, at 11:43, Francesco Messineo <francesco.messineo@gmail.com> wrote: > > > >> At least IEC still allows more than two devices ;-) > >> > >> But no, the IEC on the C64 is another example of CR(ippled) hardware, plus VIA-bug workaround ridden implementation. Its big brother GPIB, while predating both, wasn't bad though. > > > > Yes it was slow, but I couldn't think about a better compromise, > > really. > > The major issue was actually the speed - not really of the bus but of the 1541 implementation with 6522 software workarounds making the bus look worse than it really was. Common thing was to add at least the parallel connection to 1541, bringing it somewhat closer to the original GPIB. And yes - it still allowed more than two devices and obviously not only the floppy drives. Yes, that was due to a bug in the 6522 chip. And sure, one of the first things that I purchased when I could, was the speeddos mod, even if I needed to go back to plain IEC speed whenever I wanted to plug the super-fast 300 bps user port modem :) FrankReceived on 2019-01-09 13:00:32
Archive generated by hypermail 2.2.0.