Re: C128 PLA dumped!

From: Nicolas Welte (
Date: 1999-01-20 09:36:53

Marko Mäkelä wrote:
> > BTW, I can still be talked into providing a more complete dump, with 26
> > inputs and 16 outputs.
> This is not such a big task.  Now you have wired the 2 untied inputs to
> fixed values, right?  Then produce 3 other dumps using the 3 other values
> (move the two inputs from their current setting to the other setting, one
> at a time (e.g. 00->01->11->10), and you don't need to solder so much).

Actually there are three inputs tied to a fixed level, VICFIX, 128/256
and DMAACK. But when I think about it, I can provide another two outputs
from the PC parallel port and make a jumper to the remaining input. 

> With rather simple rewiring, you could produce 4 dumps of the remaining 4
> output bits as well.  My simple program is designed for byte-aligned truth
> tables, so don't try to pack 2 samples to one byte.

That's an idea! Okay, I will do it, seems to be easy enough. But I will
probably not have the time before next weekend.

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