mirror of
https://github.com/a2stuff/IIcSystemClock.git
synced 2025-02-05 15:30:09 +00:00
disasm
This commit is contained in:
Joshua Bell
parent
ffe1efb44b
commit
4b770b7b16
147
clock.system.s
147
clock.system.s
@ -36,8 +36,6 @@ PORT2_ACIA_CONTROL := $C0AB
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DISXY := $C058
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ENBXY := $C059
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DISVBL := $C05A
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ENVBL := $C05B
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X0EDGE1 := $C05C
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X0EDGE2 := $C05D
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@ -46,8 +44,9 @@ MOUSE_BTN := $C063
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kClockRoutineMaxLength = 125 ; Per ProDOS 8 TRM
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L2000:
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L2001 := * + 1
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lda #$06
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default_slot := * + 1
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lda #$06 ; For easy patching???
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L2003 := * + 1 ; Patched location for ...?
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lda #$A0
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cmp #$CC
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@ -161,39 +160,47 @@ L2099 := * + 1
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jsr SetPrefixAndCheckSysFile
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lda $1204
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lsr a
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sta L22C7
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jsr L222B
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sta year
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jsr convert_to_bcd
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sta bcd_year
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;; Search device list for... ???
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;; --------------------------------------------------
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;; Identify drive slot, needed for patch1
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.scope
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;; Search device list for Disk II device
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ldx DEVCNT
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L20AF: lda DEVLST,x
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and #$0F
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beq L20C8
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: lda DEVLST,x
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and #%00001111 ; low nibble = "device identification"
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beq found ; 0 = Disk II
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dex
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bpl L20AF
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lda L2001
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and #$07
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bne L20C2
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lda #$06
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L20C2: asl a
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asl a
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asl a
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asl a
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bne L20CB
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bpl :-
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;; Did not find Disk II, use default
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lda default_slot
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and #%00000111
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bne :+
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lda #6 ; default to slot 6 if was tweaked to 0
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: asl a ; shift to 0sss0000 (like a unit number)
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asl a
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asl a
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asl a
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bne assign
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L20C8: lda DEVLST,x
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L20CB: and #%01110000 ; slot
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found: lda DEVLST,x
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assign: and #%01110000 ; slot
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ora #$80
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sta L22E3 ; Set $C0nn address
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sta patch1_firmware_byte ; Set $C0nn address
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.endscope
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;; --------------------------------------------------
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lda L11FE
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and #$03
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beq L20E3
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beq select_patch ; apply patch2 if IIc, patch1 otherwise
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cmp #$02
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bcs L20FE
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lda mach_type
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bne not_iic
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bne not_iic ; apply patch3
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beq L20FE ; always
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;;; ------------------------------------------------------------
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@ -203,7 +210,12 @@ kPatch1Offset = $0
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kPatch2Offset = $38
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kPatch3Offset = $70
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L20E3: ldy #kPatch2Offset
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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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lda mach_type
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beq apply_patch ; if IIc
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ldy #kPatch1Offset
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@ -222,15 +234,19 @@ apply_patch:
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cpx #kPatchLength
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bne :-
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L20FE: lda #$02
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sta L210F
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L2103: jsr CalcMonthValidateDateTime
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;;
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L20FE: lda #2
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sta tries
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: jsr CalcMonthValidateDateTime
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bcs L2111
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dec L210F
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bpl L2103
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bmi L2156
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dec tries
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bpl :-
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bmi install_clock ; always
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tries: .byte 0
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;;; ------------------------------------------------------------
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L210F: .byte 0
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L2110: .byte 0
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L2111: lda mach_type
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@ -269,15 +285,17 @@ no_clock:
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;; --------------------------------------------------
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L2156: lda #OPC_JMP_abs
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install_clock:
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lda #OPC_JMP_abs
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sta DATETIME
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lda MACHID
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ora #%00000001 ; has clock
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sta MACHID
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bit KBD
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bmi L218C
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lda month
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cmp #$0B
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cmp #11
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bcc L2176
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bit L11FE
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bpl L2176
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@ -291,14 +309,18 @@ L2176: lda $1204
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lda DATELO+1
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sbc $1204
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bcs L21DF
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L218C: bit KBDSTRB
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rol L11FE
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lda #$03
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lda #3
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cmp month
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ror L11FE
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;; --------------------------------------------------
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;; Show current year prompt
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L2199: ldy #MessageCode::kCurrentYear
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.scope
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show_year_prompt:
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ldy #MessageCode::kCurrentYear
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jsr ShowMessage
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lda bcd_year ; 2-digit year
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@ -311,7 +333,7 @@ L2199: ldy #MessageCode::kCurrentYear
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: jsr RDKEY
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and #%11011111 ; lowercase --> uppercase
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cmp #'Y'|$80
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beq L21D3
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beq year_ok
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cmp #'N'|$80
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bne :-
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@ -329,11 +351,14 @@ L2199: ldy #MessageCode::kCurrentYear
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ora bcd_year
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sta bcd_year
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jmp L2199
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jmp show_year_prompt
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.endscope
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;; --------------------------------------------------
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;; Current year is okay
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L21D3: lda $1204
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jsr L2210
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year_ok:
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lda $1204
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jsr year_from_bcd
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jsr InvokeDriver
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jsr L111A
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L21DF: lda RWRAM1
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@ -363,7 +388,14 @@ install_ptr := * + 1
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;; Chain
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jmp L1000
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L2210: lda bcd_year
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;;; ------------------------------------------------------------
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;;; Convert year from BCD
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;;; Input: bcd_year
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;;; Output: year
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;;; $06 is trashed
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.proc year_from_bcd
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lda bcd_year
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pha
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lsr a
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lsr a
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@ -379,10 +411,17 @@ L2210: lda bcd_year
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and #$0F
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clc
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adc $06
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sta L22C7
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sta year
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rts
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.endproc
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.proc L222B
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;;; ------------------------------------------------------------
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;;; Convert to BCD
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;;; Input: A = number
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;;; Output: A = BCD number
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;;; $06 is trashed
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.proc convert_to_bcd
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ldx #$FF
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: inx
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sec
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@ -400,7 +439,6 @@ L2210: lda bcd_year
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.endproc
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;;; ------------------------------------------------------------
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;;; Returns with carry set if date is not valid.
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.proc CalcMonthValidateDateTime
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@ -500,15 +538,20 @@ L22B2 := * + 2
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dex
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bne L22A3
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L22BA: lda $0200
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asl a
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and #$E0
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;; --------------------------------------------------
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;; Assign month in DATELO/DATEHI
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L22BA: lda $0200 ; top nibble is month
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asl a ; DATELO = mmmddddd
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and #%11100000
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ora DATELO
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sta DATELO
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L22C7 := * + 1
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lda #$56
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rol a
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year := * + 1
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lda #86 ; default = 1986
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rol a ; DATEHI = yyyyyyym, shift in month bit
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sta DATELO+1
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;; --------------------------------------------------
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ldy #$01
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L22CE: lda $0208,y
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ora #$B0
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@ -536,7 +579,7 @@ Patches:
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;; Patch #1
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patch1:
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L22E3 := * + 1
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patch1_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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