[Techtoolslist] WTB/WTT: NAMCO Pole Position schematics SP-219

[John Robertson]

I need a copy of these - does anyone have them in their files? Prefer 11 
X 17 in. copies.

I have the CTS-1 cable for the board and can power it up, but there is a 
weird RAM select issue that I can't resolve using the Atari SP-218 
schematics as they do not document everything! They miss the connection 
between the Sound CPU and the Data Buss DB0 - DB15. It turns out that 
DB0 - DB7 is hardwired to SD0 - SD7, but how the Sound CPU access DB8 - 
DB15 is not shown and yet the ram associated with those data lines ARE 
available to the Sound CPU.

Must be some sort of latch hiding there somewhere!

Thanks!

John :-#)#

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