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Disabling VATS with $8D

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Old Apr 3, 2006 | 01:33 PM
  #1  
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From: Alberta, Canada
Car: 80 GMC K35
Engine: TPI 355
Transmission: NV4500
Axle/Gears: 4.10
Disabling VATS with $8D

Sorry, I'm sure this question has been asked a billion times, but doing a search didn't turn up anything useful, so I figured I'd make a post, and get a definitive answer of sorts that can be searched in the future.

I'm fairly new to prom burning, and I need to disable VATS. However, my definition file isn't very clear about what the different VATS flags are. Simply states "Switch 16 (VATS TTC-R 4th-NO VATS OLP) - Bit x"

Where x is replaced with a number 0 - 7. Which bit is the one that I need to be unsetting? Bits 4 and 1 are both set, the rest are not.
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Old Apr 3, 2006 | 08:43 PM
  #2  
80Sierra's Avatar
Thread Starter
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Joined: Sep 2004
Posts: 231
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From: Alberta, Canada
Car: 80 GMC K35
Engine: TPI 355
Transmission: NV4500
Axle/Gears: 4.10
Alright!

I did a bunch more searching, and finally found what I was looking for

Its bit number 4 that needs to be unchecked to disable vats.

Code:
L8016:        .byte   0x10    ; AFR OPTION WORD 1         0001 0100
                              ; DRef: 0xD8B6,0xD936,0xB35D,0xCF3E,0xD03C,0xE140
                              ;---------------------------------------------
                              ; b7, 1 = --
                              ; b6, 1 = USE A/D BATT FOR INJ Lk Up, (else use PUMP VDC)
                              ; b5, 1 = OPEN LOOP PURGE
                              ; b4 ,1 = ENABLE VATS
                              ;
                              ; b3, 1 = LET LOW TPS DISABLE CCP
                              ; b2, 1 = 4TH GEAR SWITCH N.O.
                              ; b1, 1 = 16 Hz CCP SOLENIOD IN USE
                              ; b0, 1 = RPM FOR TCC vs MPH
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