IGT machines number 96400300 are they S+

[a69mopar]

Oh, I see that Rick already mentioned this....

[dogwrangler]

Thanks for the datasheet.  It looks like the processor takes 5 clocks (minus a fixed setup) to read instructions.  The data sheet shows 207ns address to valid instruction for a 16mhz clock.  You still need to subtract out what the address decoding is between the processor and the eprom, and what the data muxing is from the eprom back to the processor (maybe 50ns total?).  I would need to see the schematics to go any further.  It seems like a -90 eprom would be plenty fast enough.  Am I missing something else?

Does anyone know if the 10mhz board is identical to the 16mhz board (except for the speed)?  (same addressing, connectors, etc.)

Cheers,
-Greg

(I'm really gonna have to get some of these to play with)

[OhioGaming]

I have not had any luck using the 16 MHz board and getting a decent sound out of a Haywire game (does not sound the same as a 10 MHz board).

[dogwrangler]

Ok.  From that I would guess that the actual program is different between the 10 and the 16, that it's not just a speed compatibility issue.  (sorry for the thread detour).

Cheers,
-Greg

[jay]

The 16mhz code set is different as it includes additional options to control the sound and I believe credit count speed.

[blueridgeslots]

I have not had any luck using the 16 MHz board and getting a decent sound out of a Haywire game (does not sound the same as a 10 MHz board).

Even using the SP 1146 Ken, the 16 meg board was used in many Haywire Dlx games in the day, I bought one from Chris (cp on here) back in the 90's and found the board today while looking for some other boards, I don't know if there is any other SP for type 2/21 on the 16 mhz board, I always used SP 1145 and 1146 in non Barcrest games, always on fast chips, even though there are a few others, you do have to tolerate the noise in a quiet room, but on Slant Tops you get the reel stop sound, unlike the 10 mhz, MGM properties put 16 mhz boards in all their Slants if I remember back then

[OhioGaming]

Jim,

I think .. I was using the 1252. Next time I get around to I will try the 1146.

Thanks,
Ken