[stella] Chip Select Line

["Kroko" <Nil.Krokodil@xxxxxxx>]

Hello !

 

I have made a little testing with an original PacMan ROM chip.

I made all the lines available for measuring the signals.

 

If I connect all lines to the PacMan ROM, as in the original cartridge,

everything works fine.

 

What I did now is, that I connected the A12 line to an 7407 buffer and from the

output of that buffer back to the CS line o the ROM. It is not inverting, so it

should work. But it doesn't. Why not ?

 

What are the timing requirements for the A12 line ? What am I missing ?

It should work, shouldn't it ?

 

Kroko.