Re: Red Baron AVG ROM question

On A 2732 OR 2716 Pin 18 is a Chip Select, the pin that is different
between a 2716 and a 2732 is pin 21 (Vcc - 2716, A11 - 2732). Perhaps there
is a typo and it should be pin 21 that is pulled out of the socket and
jumpered. Check the schematic for Battlezone and see if 21 is hardwired to
+5, I suspect it is, and in that case only the upper 1/2 of the 2732 is active.

John :-#)#

At 09:18 PM 5/7/2000 , Matthew Sell wrote:
>Howdy,
>
>
>I recently attempted to modify a Battlezone AVG board to run Red Baron
>using the modification text listed in the ROM set used for MAME. The
>modification is listed as follows:
>
>All roms 2716 with the exception of H1, which is a 2732 with pin 18 pulled
>up and a wire run to M2 pin 13
>
>I performed this modification - and the game runs the self test but not
>the game. In attempting to troubleshoot the boardset using the Red Baron
>schematics, I noticed that H1 is listed as an 8316, with the same
>address/data wiring as Battlezone.
>
>???
>
>Are the schematics incorrect, or is this modification not necessary?
>
>I'd try it out, but ran out of 16K EPROMS..... : )
>
>Thanks!
>
>
> - Matt
>
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Received on Mon May 8 03:07:50 2000