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======== Newsgroups: rec.games.video.arcade.collecting Subject: RALLY-X.SW From: ms01@qits.net.au (Mark Sheldon) Date: Sun, 01 Sep 1996 07:46:52 GMT Switch settings for Rally-X. I have a clone board which has 2 boards connected by 2 IDC cables. My board has two sets of DIP switches, an 8 way at 11E on the video/sound board, and 4 way on the CPU board. The following is presented as is etc. no responsibility accepted or taken if it fries you, your board, your cat, etc... From my maintenance manual... Position Option -------- ------ 8 7 6 5 4 3 2 1 ------------------------------- off off *1 coin for 1 play off on 1 coin for 2 plays on off 2 coins for 1 play on on Free play off off off off 3 cars, rank C, bonus @ 60000 off off off on 2 cars, rank B, bonus @ 40000 off off on off 1 cars, rank C, bonus @ 30000 off off on on 3 cars, rank A, bonus @ 60000 off on off off 2 cars, rank C, bonus @ 40000 off on off on 1 cars, rank B, bonus @ 30000 off on on off 3 cars, rank B, bonus @ 60000 off on on on 2 cars, rank A, bonus @ 40000 on off off off 3 cars, rank C, bonus @ 20000 on off off on 2 cars, rank B, bonus @ 15000 on off on off 1 cars, rank C, bonus @ 10000 on off on on *3 cars, rank A, bonus @ 20000 on on off off 2 cars, rank C, bonus @ 15000 on on off on 1 cars, rank B, bonus @ 10000 on on on off 3 cars, rank B, bonus @ 20000 on on on on 2 cars, rank A, bonus @ 15000 off MAINTENANCE USE ONLY * indicates default setting 'Switch 8 is for maintenance use only and should normally be in OFF position. This halts the microprocessor. If it is inadvertently placed in the ON position, a multicoloured pattern appears on the screen on power up.' I've no idea what switch 7 does. The manual also advises: 'Toggle switches are also found at position 4A on the CPU board. These are for maintenance only and should not be touched.' Looking at the circuit diagram, we see that: Switch1: No connection Switch2: on: pin 21 of ROMS tied to A12 line. Off: pin 21 of ROMS isolated Switch3: on: 'A' input of '139 ROM decoder tied to A12 line. Off: 'A' input of '139 ROM decoder tied high. Switch4: on: pin 21 of ROMS tied to +5V Off: pin 21 isolated My guess is that they select 2716 or 2732 ROMS. 2716: switch 3,4 on, switch 2 off 2732: switch 3,4 off, switch 2 on I have 2716's on my board, and mine are set as shown. ---------------- Mark Sheldon ms01@qits.net.au }