Apple-2-SW/IIcSystemClock
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This commit is contained in:
Joshua Bell 2020-10-05 19:30:59 -07:00
parent beb71633b7
commit 3d0b4f7e0e
1 changed files with 48 additions and 17 deletions
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65
clock.system.s
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@ -31,10 +31,18 @@ has_80col := $09 ; 1 = has 80 column card
month := $0A ; month from current date month := $0A ; month from current date
msg_num := $0B ; stashed message number msg_num := $0B ; stashed message number
digits_buffer := $200 ; temporary usage during clock read
PRODOS_SYS_START := $2000 PRODOS_SYS_START := $2000
SLOT3_FIRMWARE := $C300 SLOT3_FIRMWARE := $C300
;;; SSC in Slot 1
PORT1_ACIA_STATUS := $C099
PORT1_ACIA_COMMAND := $C09A
PORT1_ACIA_CONTROL := $C09B
;;; SSC in Slot 2
PORT2_ACIA_STATUS := $C0A9 PORT2_ACIA_STATUS := $C0A9
PORT2_ACIA_COMMAND := $C0AA PORT2_ACIA_COMMAND := $C0AA
PORT2_ACIA_CONTROL := $C0AB PORT2_ACIA_CONTROL := $C0AB
@ -264,14 +272,15 @@ tries: .byte 0
L2110: .byte 0 L2110: .byte 0
L2111: lda mach_type .proc L2111
bne L2135 ; not IIc lda mach_type
bne skip ; not IIc
lda L2110 lda L2110
bne L2135 bne skip
inc L2110 inc L2110
ldy #$99 ldy #<PORT1_ACIA_STATUS
sty acia_status_patch1 sty acia_status_patch1
iny iny ; <PORT1_ACIA_COMMAND
sty acia_command_patch1 sty acia_command_patch1
sty acia_command_patch2 sty acia_command_patch2
lda L11FE lda L11FE
@ -280,7 +289,7 @@ L2111: lda mach_type
sty acia_command_patch3 sty acia_command_patch3
bne L20FE bne L20FE
L2135: ldy #MessageCode::kNoClock skip: ldy #MessageCode::kNoClock
sty msg_num sty msg_num
lda MACHID ; Check for clock card lda MACHID ; Check for clock card
ror a ror a
@ -296,6 +305,7 @@ no_clock:
sta TIMELO sta TIMELO
sta TIMELO+1 sta TIMELO+1
jmp ShowMessageAndMaybeChain jmp ShowMessageAndMaybeChain
.endproc
;; -------------------------------------------------- ;; --------------------------------------------------
@ -551,27 +561,36 @@ acia_command_patch3 := * + 1
;; ...Patch applied to here. ;; ...Patch applied to here.
;; -------------------------------------------------- ;; --------------------------------------------------
;; Process digits ;; digits_buffer $200...$207 now has "MMDDhhmm", each digit as a byte
ldx #6
L22A3: lda $0201,x
: dec $0200,x ; ;; --------------------------------------------------
;; Process fields (two digits/bytes at a time)
ldx #6
digit_loop:
lda digits_buffer+1,x ; ones place
: dec digits_buffer,x ; tens place
bmi :+ bmi :+
clc clc
adc #10 adc #10
bcc :- bcc :-
: :
;; A now holds binary value
offset_table_addr := * + 1 offset_table_addr := * + 1
ldy time_offset_table,x ; Offset table ldy time_offset_table,x ; Offset table
sta DEVNUM,y ; y is offset from DEVNUM for some reason sta DEVNUM,y ; y is offset from DEVNUM for some reason
dex dex
dex dex
bne L22A3 bne digit_loop
;; Now TIMELO holds minutes, TIMEHI has hours,
;; DATELO has days. Months has not been processed.
;; -------------------------------------------------- ;; --------------------------------------------------
;; Assign month in DATELO/DATEHI ;; Assign month in DATELO/DATEHI
L22BA: lda $0200 ; top nibble is month L22BA: lda digits_buffer ; top nibble is month???
asl a ; DATELO = mmmddddd asl a ; DATELO = mmmddddd
and #%11100000 and #%11100000
ora DATELO ora DATELO
@ -584,22 +603,34 @@ L22BA: lda $0200 ; top nibble is month
;; -------------------------------------------------- ;; --------------------------------------------------
ldy #$01 ldy #$01
L22CE: lda $0208,y : lda $0208,y
ora #$B0 ora #$B0
sta $020F,y sta $020F,y
dey dey
bpl L22CE bpl :-
dex dex
bne L22BA bne L22BA
plp
;; --------------------------------------------------
;; Exit driver
plp ; restore interrupt state
;; HACK: This RTS=$60 doubles as the first real entry in the
;; offset table.
.assert OPC_RTS = DATELO - DEVNUM, error, "Offset mismatch"
rts rts
;; Offset from MMDDhhmm digits to DATE/TIME fields in
;; ProDOS global page. Only the even entries are used
;; and months get special handling.
time_offset_table := * - 3 time_offset_table := * - 3
.byte $FF ; dummy .byte $FF ; dummy
.byte TIMELO+1 - DEVNUM ; offset .byte TIMELO+1 - DEVNUM ; offset to hours field
.byte $FF ; dummy .byte $FF ; dummy
.byte TIMELO - DEVNUM ; offset .byte TIMELO - DEVNUM ; offset to minutes field
;; End of relocated clock driver ;; End of relocated clock driver