mirror of
https://github.com/a2stuff/IIcSystemClock.git
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disasm wip
This commit is contained in:
Joshua Bell
parent
420f400eb6
commit
beb71633b7
118
clock.system.s
118
clock.system.s
@ -55,6 +55,9 @@ kDefaultVersionByte = HI(' ')
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kDefaultYear = 1986
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kDefaultDelay = $5D
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kPatchedDelay = $5C
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L2000:
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default_slot := * + 1
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lda #kDefaultDriveSlot ; For easy patching???
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@ -65,9 +68,9 @@ L2000:
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bne L2013
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sta L239E + (L1272 - L1000) ; In relocated code
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lda #$5C
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sta L2285
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sta L2336
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lda #kPatchedDelay
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sta delay_patch1
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sta patch2_delay
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L2013:
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;; Clear stack
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ldx #$FF
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@ -220,29 +223,27 @@ assign: and #%01110000 ; slot
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;;; ------------------------------------------------------------
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kPatchLength = $38
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kPatch1Offset = $0
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kPatch2Offset = $38
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kPatch3Offset = $70
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;;; Patch1 - otherwise
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;;; Patch2 - for mach_type = IIc
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;;; Default -
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;;; Patch1 - otherwise
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;;; Patch2 - for mach_type = IIc
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;;; Patch3
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select_patch:
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ldy #kPatch2Offset
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ldy #patch2 - Patches
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lda mach_type
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beq apply_patch ; if IIc
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ldy #kPatch1Offset
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ldy #patch1 - Patches
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jmp apply_patch
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;; Patch bytes on top of driver
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not_iic:
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ldy #kPatch3Offset
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ldy #patch3 - Patches
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apply_patch:
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ldx #$00
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ldx #0
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: lda Patches,y
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sta L2269,x
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sta patch_target,x
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iny
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inx
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cpx #kPatchLength
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@ -269,14 +270,14 @@ L2111: lda mach_type
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bne L2135
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inc L2110
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ldy #$99
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sty L228A
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sty acia_status_patch1
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iny
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sty L226A
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sty L2274
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sty acia_command_patch1
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sty acia_command_patch2
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lda L11FE
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and #$03
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beq L20FE
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sty L229F
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sty acia_command_patch3
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bne L20FE
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L2135: ldy #MessageCode::kNoClock
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@ -500,15 +501,19 @@ Driver: cld
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cld ; TODO: Remove duplicate CLD
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php
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sei
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L2269:
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L226A := * + 1
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;; --------------------------------------------------
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;; Patch applied from here...
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patch_target:
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acia_command_patch1 := * + 1
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lda PORT2_ACIA_COMMAND
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pha ; Save command register
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ldy #$03
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ldx #$16
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lda #%00001000
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L2273:
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L2274 := * + 1
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acia_command_patch2 := * + 1
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sta PORT2_ACIA_COMMAND
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L2276: dex
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bne L2276
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@ -519,12 +524,14 @@ L2276: dex
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ldy #$04
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bne L2289
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L2284:
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L2285 := * + 1
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lda #$5D
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L2286: dec ; 65C02
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bne L2286
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delay_patch1 := * + 1
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lda #kDefaultDelay
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: dec ; 65C02
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bne :-
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L2289:
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L228A := * + 1
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acia_status_patch1 := * + 1
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lda PORT2_ACIA_STATUS
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rol a
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rol a
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@ -538,9 +545,12 @@ L228A := * + 1
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bpl L2284
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pla ; Restore command register
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L229F := * + 1
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acia_command_patch3 := * + 1
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sta PORT2_ACIA_COMMAND
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;; ...Patch applied to here.
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;; --------------------------------------------------
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;; Process digits
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ldx #6
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L22A3: lda $0201,x
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@ -599,9 +609,11 @@ time_offset_table := * - 3
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Patches:
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;; --------------------------------------------------
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;; Patch #1
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patch1:
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patch1_firmware_byte := * + 1
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.proc patch1
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firmware_byte := * + 1
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lda $C0E0 ; Set to $C0x0, n=slot+8
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lda DISVBL
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ldy #$01
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@ -631,33 +643,40 @@ L2307: lda MOUSE_BTN
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ldy #$04
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dex
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bpl L2300
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.assert * - patch1 = kPatchLength, error, "Patch length"
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.endproc
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.assert .sizeof(patch1) = kPatchLength, error, "Patch length"
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patch1_firmware_byte := patch1::firmware_byte
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;; --------------------------------------------------
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;; Patch #2
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patch2:
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.assert * = Patches + kPatch2Offset, error, "Offset changed"
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.proc patch2
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;; Prime the command
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lda PORT2_ACIA_COMMAND
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nop
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ldy #$03
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ldx #$16
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lda #%00000010
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L2324: sta PORT2_ACIA_COMMAND
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L2327: dex
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bne L2327
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command_loop:
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sta PORT2_ACIA_COMMAND
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: dex
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bne :-
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eor #$0A
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ldx #$09
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dey
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bne L2324
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bne command_loop
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ldy #$04
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bne L233A
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L2335:
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L2336 := * + 1
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lda #$5D
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L2337: dec ; 65C02
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bne L2337
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L233A: lda PORT2_ACIA_STATUS
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bne read_status ; always
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;; Read the result
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read_loop:
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delay := * + 1
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lda #kDefaultDelay
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: dec ; 65C02
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bne :-
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read_status:
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lda PORT2_ACIA_STATUS
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eor #$20
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rol a
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rol a
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@ -665,21 +684,21 @@ L233A: lda PORT2_ACIA_STATUS
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ror $0200,x
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lsr $0201,x
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dey
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bne L2335
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bne read_loop
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ldy #$04
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dex
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bpl L2335
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bpl read_loop
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nop
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nop
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.assert * - patch2 = kPatchLength, error, "Patch length"
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.endproc
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.assert .sizeof(patch2) = kPatchLength, error, "Patch length"
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patch2_delay := patch2::delay
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;; --------------------------------------------------
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;; Patch #3
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patch3:
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.assert * = Patches + kPatch3Offset, error, "Offset changed"
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.proc patch3
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lda ENVBL
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sta ENBXY
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sta X0EDGE1
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@ -710,7 +729,8 @@ L236B: lda MOUSE_BTN
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dex
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bpl L2369
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lda DISVBL
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.assert * - patch3 = kPatchLength, error, "Patch length"
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.endproc
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.assert .sizeof(patch3) = kPatchLength, error, "Patch length"
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;;; ============================================================
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