Re: CBM source code
Date: 1998-01-11 08:05:57

Aan 29-12-97 19:32, in bericht 
=?ISO-8859-1?Q?Marko_M=E4kel=E4?= <> schreef:

> Doh,
> I meant Dennis Jarvis, not David Gahris.  But anyway, have a look at
> in a couple of hours.
>   Marko

Hallo Marko, 

Sorry, I did not find the mentioned sourcecode, or am I wrong in one or another 

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

Archive generated by hypermail 2.1.1.