TwinTurbo.NET: Nissan 300ZX forum - How so?
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Subject How so?
     
Posted by zromtech on April 11, 2015 at 2:25 PM
  This message has been viewed 305 times.
     
In Reply To AFM & TPS are also used....... posted by zx299 on April 11, 2015 at 12:03 AM
     
Message There's nothing in the ECU code for the VTC control subroutine that reads from the AFM or TPS.


VTC_sub:
tim #%10000000, byte_00DD
beq loc_CF07
tst byte_1676
beq loc_CF76
bra loc_CF71

loc_CF07:
tim #%1000, ram_FlagsA
beq loc_CF76
tim #%101, ram_Flags1
bne loc_CF76
ldaa COOLANT_TEMP
tim #%100000, ram_Flags0
beq loc_CF1B
adda #4

loc_CF1B:
cmpa rom_VTC_temp
bcs loc_CF76
ldaa COOLANT_TEMP
tim #%100000, ram_Flags0
beq loc_CF2D
suba #5
bcc loc_CF2D
clra

loc_CF2D:
cmpa rom_VTC_temp2
bcc loc_CF76
ldaa VEHICLE_SPEED
tim #%100000, ram_Flags0
beq loc_CF3C
adda #2

loc_CF3C:
cmpa rom_VTC_speed
bcs loc_CF76
ldaa ramRPM5scaled
ldx ram_TP4
tab
tim #%100000, ram_Flags0
beq loc_CF58
adda #4
bcc loc_CF53
ldaa #$FF

loc_CF53:
subb #4
bcc loc_CF58
clrb

loc_CF58:
cmpb rom_VTC_OFF_RPM
bcc loc_CF76
cmpa rom_VTC_ON_RPM
bcs loc_CF64
bra loc_CF71

loc_CF64:
xgdx
tim #%100000, ram_Flags0
beq loc_CF6C
adda #$10

loc_CF6C:
cmpa rom_VTC_ON_TP
bcs loc_CF76

loc_CF71:
oim #%100000, ram_Flags0
bra loc_CF79

loc_CF76:
aim #%11011111, ram_Flags0

loc_CF79:
sei
ldaa ram_Flags0
staa out_Flags0Copy
cli
rts
; End of function VTC_sub

     
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