On request of Mk2:
Eric (haven't found my Gen80 docs yet :-/, sorry)
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Subject: Re: Meaning of VRAM size & speed bits
Author: "Jon De Schrijder" [SMTP:[EMAIL PROTECTED]] at DE3
Date: 7/23/99 1:17 AM
MkII wrote:
> ...
> The first time I laid my hands on an MSX I POKED the PSG register 7
> directly... with 00xxxxxx!!! My 8250 sounds real bad when doing phaser
> effects, so I presume perhaps I blowed something with that POKE?!?!?
A lot of NMS8250/55/80 computers have an assembly error in the audio
output circuitry. Perhaps that's what bothering you.
NMS8250/55: R428&R429 (100R) should both be replaced by an elco
100uF/10V with the negative side towards connector 'AB'.
NMS8280: R426 (100R): replace by 100uF/10V (same as above)
Greetz,
Jon
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