John Robertson wrote :
> If you can send me a picture of the board I can hang onto it when I am
> searching my piles of old PCBs...
Here is it:
http://img1.uplood.fr/free/8imw_20100308_005018_7146_img.jpg
Just for curiosity, here are sound boards:
http://img1.uplood.fr/free/wen5_20100514_193532_8131_img.jpg
There are 6 small simple sound PCB:
A => noise generator for other boards + background sound #1
B => background sound #2
C => target explosion (hit)
D => missile explosion (missed)
E => car crossing
G => missile flight
> Otherwise you can probably fix that with a ROM Emulator and a bit of
> time. [snip]
I checked how fast PROM content is needed by the PCB.
PROM data pins are only connected to 4 shift registers inputs (74165).
There are little more than 2.0 µs between every PROM address
change and data bits being loaded into one shift register.
I have some Hitachi 2732 EPROMs (sloooow 450 ns access time).
I think such a device will do the job.
Regards,
Fabrice
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Received on Wed May 26 14:23:57 2010
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