BLM cell boundaries 12P

American Delco GM ECUs and PCMs, ALDL, OBD 1.5.
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34blazer
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BLM cell boundaries 12P

Post by 34blazer »

Where are the breakpoints defined in the xdf for BLM cell? I can only find the delta map/RPM for the breakpoints table but not the actual breakpoints to determine which cell is in use for the fuel calc.


Thanks
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34blazer
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Re: BLM cell boundaries 12P

Post by 34blazer »

Nobody? I'm in the only one still playing with GM OBD1 calibrations?


Guess it's time to move on.....
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delcowizzid
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Re: BLM cell boundaries 12P

Post by delcowizzid »

Why do you need to know what cell you are in
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem
34blazer
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Re: BLM cell boundaries 12P

Post by 34blazer »

I know which cell it is using, I'm looking to change those cell boundaries.
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VL400
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Re: BLM cell boundaries 12P

Post by VL400 »

The cell boundaries are hard coded in 12P. They were moved out of the cal segment and in to the code segment. This was done due to items containing direct memory address' that will change with every code release. Having it in the cal segment added another step to migrate cals to new versions for an item that 99.99% of people will never need to adjust.

If you have 12Pv112 then here are the items including the address...

Code: Select all

   E07C 30                31433 BLMx:	.byte	0x30		; BLM Params - RPM 1
   E07D 40                31434 	.byte	0x40		; BLM Params - RPM 2
   E07E 60                31435 	.byte	0x60		; BLM Params - RPM 3
   E07F 90                31436 	.byte	0x90		; BLM Params - RPM 4

   E080 20                31438 BLMy:	.byte	0x20		; BLM Params - MAP 1
   E081 40                31439 	.byte	0x40		; BLM Params - MAP 2
   E082 60                31440 	.byte	0x60		; BLM Params - MAP 3
   E083 80                31441 	.byte	0x80		; BLM Params - MAP 4
   E084 A0                31442 	.byte	0xA0		; BLM Params - MAP 5
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