Re: Build your own REU

From: Ruud Baltissen (
Date: 2001-04-17 11:06:48

Hallo Bogax,

> First off let me say I wasn't considering ......

I have to study this befor I can give you a real reply. But I still have

> .... UMAX is asserted to suppress RAM

To be honnest, I didn't understand the explanation of UMAX, maybe partly
because I have no idea how you initialize this mode.

> or stay out of the VIC's way during bad lines.
> (haven't thought that far)

This is where the VIC tristates the 6510, right? My idea was using the
READY-line anyway. READY is activated until a positive AND a negative edge
of CLK2 has been detected. Includ BA as an extra input to this detection
mechanism and problem solved ( I think).

Groetjes, Ruud

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