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Thread: $EE Code for electric water pump on AIR output

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  1. #1
    Fuel Injected!
    Join Date
    Jan 2012
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    Poland
    Posts
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    $EE Code for electric water pump on AIR output

    Hi!

    I'm trying to patch $EE code to use AIR pump output to control electric water pump on an LT1.
    Here are parts of E-side disassembly that control the AIR pump:
    Code:
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ;
    ; 0x531F some AIR Pump code (probably enable at startup ???) (part of hc11_irq_00) (executed when L0023 b0 is clear)
    ;
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    531F    B6 20 28            ldaA    b_2028_sw_b3vats_b2spddens_b0tcs
    5322    85 04               bitA    #%00000100    ; test AIR Pump switch bit (E-side 0x2028 b2)
    5324    27 1B               beq @8                ; Bra to continue if bit clear
    5326    B6 01 92            ldaA    l_0192_CoolTmp_fltrd_$f0    ; Load Coolant Temp
    5329    B1 23 B2            cmpA    L23B2                       ; Compare to AIR pump disable temp threshold (E-side 0x23B2)
    532C    23 10               bls @7              ; Bra if Temp <= threshold
    532E    B6 01 28            ldaA    L0128       ; Load ???
    5331    81 AB               cmpA    #$AB        ; Compare to 171
    5333    24 06               bcc @6              ; Bra if L0128 >= 171
    5335    CE 18 00            ldX    #$1800             ; Load Hardware output address
    5338    1C 00 02            bset    0, X, #%00000010  ; Set AIR Pump output bit
    533B    14 28 10        @6  bset    L0028, #%00010000 ; Set AIR Pump ON flag
    533E    7F 02 44        @7  clr     L0244             ; Clear AIR Pump Timer
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Code:
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ;
    ; 0x4962 Update AIR Pump State (part of loop_c_00)
    ;
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    4962    B6 01 28        @12 ldaA    L0128    ; Load ???
    4965    81 AB               cmpA    #$AB     ; Compare to 171
    4967    24 29               bcc @14          ; Bra if L0128 >= 171
    4969    12 2F 01 2D         brset   l_002f_fts_2_stat_byte, #%00000001, @15    ;Bra if  T-side AIR request
    496D    12 28 20 1E         brset   L0028, #%00100000, @13    ; Branch if AIR ON flag is set
    4971    13 28 10 1D         brclr   L0028, #%00010000, @14    ; Branch if AIR Startup Request flag is clear
    ; Increase AIR Pump timer
    4975    B6 02 44            ldaA    L0244    ; Load AIR Pump Timer to A
    4978    8B 01               addA    #$01     ; Add 1 to A
    497A    82 00               sbcA    #$00     ; Subtract 0 from A with carry
    497C    B7 02 44            staA    L0244    ; Store AIR Pump Timer
    497F    B1 23 B3            cmpA    L23B3    ; Compare increased AIR Pump Timer to AIR pump timer threshold (E-side 0x23B3)
    4982    25 1F               bcs @16          ; Bra if A lower than threshold
    
    4984    14 28 20            bset    L0028, #%00100000    ; Set AIR ON flag
    4987    15 28 10            bclr    L0028, #%00010000    ; Clear AIR Startup Request flag
    498A    7F 02 44            clr     L0244                ; Clear AIR Pump Timer
    498D    20 03               jr @14
    ; Here if AIR Pump should be turned OFF (T-side AIR request clear and AIR ON set)
    498F    15 28 20        @13 bclr    L0028, #%00100000    ; Clear AIR ON flag
    ; Here if L0128 >= 171, AIR Pump timer threshold met or AIR Startup Request flag clear
    4992    CE 18 00        @14 ldX    #$1800                ; Load Hardware output address
    4995    1D 00 02            bclr    0, X, #%00000010     ; AIR Pump OFF
    4998    20 0F               jr @17                       ; Bra to continue
    ;
    499A    14 28 20        @15 bset    L0028, #%00100000    ; Set AIR ON flag
    499D    15 28 10            bclr    L0028, #%00010000    ; Clear AIR Startup Request flag
    49A0    7F 02 44            clr     L0244                ; Clear AIR Pump Timer
    ; Here if AIR Pump timer threshold not met
    49A3    CE 18 00        @16 ldX    #$1800                ; Load Hardware output address
    49A6    1C 00 02            bset    0, X, #%00000010     ; AIR Pump ON
    49A9    7E 4E 38        @17 jmp     L4E38
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    So far I've managed to get it working most of the time, pump swithes on when engine is running and turns off when engine stalls, but sometimes it turns off while engine is running. It does not report that it's ON in EEHack, but I can still enable it using EEHack control and then the AIR ON flag is set.
    Here is my code patch:
    Code:
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ;
    ; 0x4962 Update AIR Pump State (part of loop_c_00)
    ;
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    4962    B6 01 5F            ldaA    l_015f_RPM_2.5/bit ; Load engine speed
    4965    CE 18 00            ldX    #$1800              ; Load Hardware output address
    4968    12 2F 01 10         brset   l_002f_fts_2_stat_byte, #%00000001, @14    ;Bra if T-side AIR request set
    496C    81 A0               cmpA    #$A0    ; Compare to 400rpm
    496E    24 0C               bcc @14         ; Bra if higher or same
    4970    81 78               cmpA    #$78    ; Compare to 300rpm
    4972    22 0E               bhi @15         ; Bra if higher
    4974    15 28 20        @13 bclr    L0028, #%00100000    ; Clear AIR ON flag
    4977    1D 00 02            bclr    0, X, #%00000010     ; AIR Pump OFF
    497A    20 06               bra @15                      ; Bra to continue
    497C    14 28 20        @14 bset    L0028, #%00100000    ; Set AIR ON flag
    497F    1C 00 02            bset    0, X, #%00000010     ; AIR Pump ON
    4982    20 25           @15 bra @17
    ....
    49A9    7E 4E 38        @17 jmp     L4E38
    ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Maybe some of you may get me on the right track here, there must be something I don't see in the code that turns the AIR output OFF. Also, do you know what is in L0128 RAM address? I can't figure it out.
    Last edited by dzidaV8; 1 Week Ago at 06:35 AM.

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