Den Sat, 6 Oct 2018 19:52:23 +0200 skrev Francesco Messineo <francesco.messineo@gmail.com>: > On Sat, Oct 6, 2018 at 7:45 PM Gerrit Heitsch > <gerrit@laosinh.s.bawue.de> wrote: > > > > > > Well, this version is using an early version of the Zorro bus, the > > whole logic implemented in PALs and TTLs and not a BUSTER chip as > > in the later A2000 where AGNUS came in 84pin PLCC instead of 48pin > > DIP. There are some problems with the bus protocol on the Zorro > > slots. Well, the "protocol" itself is mostly just the autoconfig process, which is super simple to implement (and most likely not a problem). The problems it might have seems more likely to be of the analogue kind, i.e. reflections or similar. That might, or might not, be an issuie in your case. > > The main difference is that if you use a CPU card with this A2000, > > you have to remove the 68000 from the mainboard. > > > > But then, I am not using a CPU card or any kind of expansion card > > in it and I either have to use the right CPU (the ST 68000) when > > using KS 1.3 or just use KS 1.2 with any 68000 to have no problems > > at all. > > I don't know what type of chip "hosts" the Kickstart (I'm not so > expert on Amigas), but did you try to copy the KS 1.3 on different > EPROMs? One problem is that almost no one who's not an "Amiga kickstart burner" has those EPROM's in their good-to-have junk box. They are 16-bit and therefore much rarer. > Sounds like some weird decoupling/logic-threshold/rail-bouncing > problem. I would have a good look at the CPU bus with a logic > analyzer. Agreed, but maybe an oscilloscope would be better, as it's not unlikely that the issue needs a faster tool than most logic analyzers. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies.Received on 2018-10-06 21:02:13
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