========
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
|