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XPRS_RATIO,KA_PRESS_PROFILE_START_RATIO,0001BE58,c,Ratio,Contains the starting gear ratio values for upshift timing.
XPRS_RATIO,KA_PRESS_PROFILE_MIDDLE_RATIO,0001BEA6,c,Ratio,Ratio values used to trigger 2nd pressure profile modifier to Shift_Pressure.
XPRS_RATIO,KA_PRESS_PROFILE_END_RATIO,0001BEF4,c,Ratio,Contains the ending gear ratio values for upshift timing.
XSEM_RATIO,KA_UPSHFT_SEM_RMP_OUT_STRT_RATIO,0001C3E0,c,Ratio,Ratio thresholds that decide when torque reduction shouldbegin ramping from maximum to zero
XSEM_RATIO,KA_UPSHIFT_SEM_RMP_OUT_END_RATIO,0001C446,c,Ratio,Ratio thresholds that decide when torque reduction shouldstop ramping from maximum to zero
XSEM_RATIO,KA_UPSHIFT_SEM_RMP_IN_STRT_RATIO,0001C4AC,c,Ratio,Ratio thresholds that decide when torque reduction shouldbegin ramping from zero to maximum
XSEM_RATIO,KA_UPSHIFT_SEM_RAMP_IN_END_RATIO,0001C512,c,Ratio,Ratio thresholds that decide when torque reduction shouldstop ramping from zero to maximum and stay at maximum
XTIM_RATIO,KV_UPSHIFT_START_RATIO,0001CE04,c,Ratio,Ratio used to start timing the upshift time
XTIM_RATIO,KV_UPSHIFT_END_RATIO,0001CE0A,c,Ratio,Ratio used to determine if a new gear is reached
XTIM_RATIO,KV_DOWNSHIFT_START_RATIO,0001CE10,c,Ratio,Ratio used to start timing the downshift time.
XTIM_RATIO,KV_DOWNSHIFT_END_RATIO,0001CE16,c,Ratio,Ratio used to determine if a new gear is reached.

exo3901 wrote:Since you have looked at plenty of these have you come across any OS's that use the parameters listed below or know how these are used? I am more interested in the torque management items. The pressure stuff I want to explore later to try understanding how steady state/part throttle cruising transmission pressure is determined with an artificially low reported torque value (scaled tune for large injectors). The torque management rpm ratios I find at these locations in 7603 OS's seems to make sense and line up very well with the shift torque management patents from GM.

When I look at the disassembled code in ghidra or IDA there are no references to these tables. Same for the RPM drop ratios table, but I have seen data that indicates the ratios are used in the tune. I presume the disassembly has many errors since I do not know the code or how to fix things correctly, still learning. My goal is to figure out how these tables work and if they do, figure out how to apply the logic to the T42 in my GTO since I found very similar ratio tables in there as well. None are defined in EFI or HPT on any T42 OS that I have found but from the descriptions below it seems like they may benefit some.

These are copied direct from the dumpster dive .csv for the 7603 OS on the LegacyNSFW github.

XPRS_RATIO,KA_PRESS_PROFILE_START_RATIO,0001BE58,c,Ratio,Contains the starting gear ratio values for upshift timing.
XPRS_RATIO,KA_PRESS_PROFILE_MIDDLE_RATIO,0001BEA6,c,Ratio,Ratio values used to trigger 2nd pressure profile modifier to Shift_Pressure.
XPRS_RATIO,KA_PRESS_PROFILE_END_RATIO,0001BEF4,c,Ratio,Contains the ending gear ratio values for upshift timing.
XSEM_RATIO,KA_UPSHFT_SEM_RMP_OUT_STRT_RATIO,0001C3E0,c,Ratio,Ratio thresholds that decide when torque reduction shouldbegin ramping from maximum to zero
XSEM_RATIO,KA_UPSHIFT_SEM_RMP_OUT_END_RATIO,0001C446,c,Ratio,Ratio thresholds that decide when torque reduction shouldstop ramping from maximum to zero
XSEM_RATIO,KA_UPSHIFT_SEM_RMP_IN_STRT_RATIO,0001C4AC,c,Ratio,Ratio thresholds that decide when torque reduction shouldbegin ramping from zero to maximum
XSEM_RATIO,KA_UPSHIFT_SEM_RAMP_IN_END_RATIO,0001C512,c,Ratio,Ratio thresholds that decide when torque reduction shouldstop ramping from zero to maximum and stay at maximum
XTIM_RATIO,KV_UPSHIFT_START_RATIO,0001CE04,c,Ratio,Ratio used to start timing the upshift time
XTIM_RATIO,KV_UPSHIFT_END_RATIO,0001CE0A,c,Ratio,Ratio used to determine if a new gear is reached
XTIM_RATIO,KV_DOWNSHIFT_START_RATIO,0001CE10,c,Ratio,Ratio used to start timing the downshift time.
XTIM_RATIO,KV_DOWNSHIFT_END_RATIO,0001CE16,c,Ratio,Ratio used to determine if a new gear is reached.