Aan 29-12-97 19:32, in bericht <Pine.OSF.3.96.971229203221.8688Femail@example.com>, =?ISO-8859-1?Q?Marko_M=E4kel=E4?= <firstname.lastname@example.org> schreef: > Doh, > > I meant Dennis Jarvis, not David Gahris. But anyway, have a look at > http://www.funet.fi/pub/cbm/firmware/ in a couple of hours. > > Marko > Hallo Marko, Sorry, I did not find the mentioned sourcecode, or am I wrong in one or another way? Hallo Andre, I haven't been able to get your board and papers but they are here in Heerlen. You mentioned not being able to format a diskette: you have to use DS DD 96TPI, no HD-diskettes! DS DD 48TPI will work as well but unreliable. About the 6522: Shifting PHI2 means a later negative edge. Hasn't it a negative effect on the behaviour of the 6522 in any way? Using a 16550: I only have experience with the 8250 but regarding the problems I had with the 6551, I only can support you advise using an Intel device in this case. You only need an extra 74LS139 to generate the RD- and WR-signals. Groetjes, Ruud
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