Identify states
This commit is contained in:
Joshua Bell
parent
e13d9f0e60
commit
7042ad9901
191
b.s
191
b.s
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@ -1,21 +1,19 @@
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;;; Disassembly of BYE.SYSTEM (Bird's Better Bye)
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.setcpu "65C02"
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.include "apple2.inc"
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.include "prodos.inc"
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L0060 := $0060
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KBD := $C000
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RAMRDOFF := $C002
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RAMRDON := $C003
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RAMWRTOFF := $C004
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RAMWRTON := $C005
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ALTZPOFF := $C008
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ALTZPON := $C009
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KBDSTRB := $C010
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ROMIN := $C081
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ROMINNW := $C082
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ROMINWB1 := $C089
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LCBANK1 := $C08B
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LC300 := $C300
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MON_SETTXT := $FB39
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@ -27,6 +25,33 @@ COUT := $FDED
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SETINV := $FE80
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SETNORM := $FE84
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ZP_HPOS := $24
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ASCII_TAB := $9
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ASCII_DOWN := $A
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ASCII_UP := $B
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ASCII_RETURN := $D
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ASCII_ESCAPE := $1B
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;;; ------------------------------------------------------------
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.define HI(char) (char|$80)
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.macro HIASCII arg
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.repeat .strlen(arg), i
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.byte .strat(arg, i) | $80
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.endrep
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.endmacro
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.macro HIASCIIZ arg
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HIASCII arg
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.byte 0
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.endmacro
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;;; ------------------------------------------------------------
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;; Loads at $2000 but executed at $1000.
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.org $2000
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@ -41,6 +66,12 @@ L2000: jmp install_and_quit
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read_buffer := $2000 ; Also, start location for launched SYS files
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current_entry := $67
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num_entries := $68
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rows_per_screen := 21
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current_line := $73
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cld
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lda ROMINNW
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stz $03F2
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@ -96,7 +127,7 @@ L1059: stx prefix ; truncate prefix to length x
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jmp keyboard_loop
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L107F: inc $6B ; ???
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stz $68
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stz num_entries
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lda open_params_ref_num
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sta read_params_ref_num
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sta $61
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@ -158,7 +189,7 @@ L10F8: ror $201E
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beq L1108
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cmp #$FF
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bne L10B5
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L1108: ldx $68
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L1108: ldx num_entries
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cpx #$80
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bcs L1129
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sta $74,x
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@ -171,31 +202,37 @@ L1115: lda read_buffer,y
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iny
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and #$0F
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sta ($6C),y
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inc $68
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inc num_entries
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bne L10B5
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L1126: jmp L1032
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L1129: MLI_CALL CLOSE, close_params
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bcs L1126
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;; TEXT : HOME : VTAB 23
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jsr MON_SETTXT
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jsr MON_HOME
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lda #$17
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lda #23 ; line 23
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jsr MON_TABV
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ldy #$00
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lda #$14
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jsr L124A
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;; Print help text
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ldy #0
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lda #20 ; HTAB 20
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jsr cout_string_hpos
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jsr L12AD
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ldx #$00
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L1148: lda prefix+1,x
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ldx #0
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: lda prefix+1,x
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beq L1153
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jsr L12AF
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inx
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bne L1148
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L1153: stz $67
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stz $73
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lda $68
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bne :-
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L1153: stz current_entry
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stz current_line
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lda num_entries
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beq keyboard_loop
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cmp #$15
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cmp #rows_per_screen
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bcc L1161
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lda #$14
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L1161: sta $6A
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@ -205,57 +242,68 @@ L1161: sta $6A
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lda #$16
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sta $21
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sta $23
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L116F: jsr L1277
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inc $67
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L116F: jsr draw_current_line
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inc current_entry
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dec $6A
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bne L116F
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stz $67
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beq L11AA
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stz current_entry
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beq draw_current_line_inv
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on_up: jsr L1277
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ldx $67
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beq L11AA
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dec $67
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.proc on_up
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jsr draw_current_line ; show current line
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ldx current_entry
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beq draw_current_line_inv
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dec current_entry
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lda $25
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cmp #$02
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bne L11AA
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dec $73
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lda #$16
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bne L11A7
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bne draw_current_line_inv
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dec current_line
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lda #$16 ; code output ???
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bne draw_current_line_with_char
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.endproc
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on_down:
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jsr L1277
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ldx $67
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.proc on_down
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jsr draw_current_line
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ldx current_entry
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inx
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cpx $68
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bcs L11AA
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stx $67
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cpx num_entries
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bcs draw_current_line_inv
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stx current_entry
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lda $25
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cmp #$15
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bne L11AA
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inc $73
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lda #$17
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cmp #rows_per_screen
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bne draw_current_line_inv
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inc current_line
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lda #$17 ; code output ???
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;; fall through
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.endproc
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draw_current_line_with_char:
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jsr COUT
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draw_current_line_inv:
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jsr SETINV
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jsr draw_current_line
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;; fall through
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;;; ------------------------------------------------------------
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L11A7: jsr COUT
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L11AA: jsr SETINV
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jsr L1277
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keyboard_loop:
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lda KBD
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bpl keyboard_loop
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sta KBDSTRB
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jsr SETNORM
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ldx $68
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ldx num_entries
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beq L11CB
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cmp #$8D ; Return
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cmp #HI(ASCII_RETURN)
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beq on_return
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cmp #$8A ; Down Arrow
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cmp #HI(ASCII_DOWN)
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beq on_down
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cmp #$8B ; Up Arrow
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cmp #HI(ASCII_UP)
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beq on_up
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L11CB: cmp #$89 ; Tab
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L11CB: cmp #HI(ASCII_TAB)
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beq next_drive
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cmp #$9B ; Esc
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cmp #HI(ASCII_ESCAPE)
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bne keyboard_loop
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jsr L11DA
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@ -280,7 +328,7 @@ L11F1: jmp L1059
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on_return:
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MLI_CALL SET_PREFIX, set_prefix_params
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bcs next_drive
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ldx $67
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ldx current_entry
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jsr L1258
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ldx prefix
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@ -292,10 +340,12 @@ on_return:
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bcc :-
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stx prefix
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ldy $67
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ldy current_entry
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lda $74,y
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bpl L11F0 ; is directory???
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;;; ------------------------------------------------------------
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.proc launch_sys_file
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jsr MON_SETTXT
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jsr MON_HOME
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@ -317,7 +367,10 @@ on_return:
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jmp read_buffer ; Invoke the loaded code
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.endproc
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L124A: sta $24
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;;; ------------------------------------------------------------
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cout_string_hpos:
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sta ZP_HPOS
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cout_string:
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lda help_string,y
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@ -347,12 +400,13 @@ L1258: stz $6D
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sta $69
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rts
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L1277: lda #$02
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draw_current_line:
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lda #$02
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sta $057B
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ldx $67
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ldx current_entry
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txa
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sec
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sbc $73
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sbc current_line
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inc a
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inc a
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jsr MON_TABV
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@ -378,21 +432,18 @@ L12AD: lda #$99
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L12AF: ora #$80
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L12B1: jmp COUT
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;;; ------------------------------------------------------------
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.proc do_read
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MLI_CALL READ, read_params
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rts
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.endproc
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.macro HIASCII arg
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.repeat .strlen(arg), i
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.byte .strat(arg, i) | $80
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.endrep
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.endmacro
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;;; ------------------------------------------------------------
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string_start := *
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.proc help_string
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HIASCII "RETURN: Select | TAB: Chg Vol | ESC: Back"
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.byte 0 ; null terminated
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HIASCIIZ "RETURN: Select | TAB: Chg Vol | ESC: Back"
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.endproc
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;; Mousetext sequence: Enable, folder left, folder right, disable
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@ -401,6 +452,8 @@ L12B1: jmp COUT
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.byte 0 ; null terminated
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.endproc
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;;; ------------------------------------------------------------
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.proc open_params
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params: .byte 3
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path: .addr prefix
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@ -436,6 +489,8 @@ trans: .word 0
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read_params_ref_num := read_params::ref_num
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read_params_request := read_params::request
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;;; ------------------------------------------------------------
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.res 192, 0
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.byte $00,$00,$00,$00,$00,$00,$00,$00
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.byte $00,$00,$00,$00,$00,$00,$00,$00
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@ -450,16 +505,22 @@ trans: .word 0
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.assert .sizeof(bbb) = $3FF, error, "Expected size is $3FF"
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.org $2402
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install_and_quit:
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;;; ------------------------------------------------------------
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.proc install_and_quit
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jsr install
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MLI_CALL QUIT, quit_params
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.proc quit_params
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MLI_CALL QUIT, params
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.proc params
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params: .byte 4
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type: .byte 0
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res1: .word 0
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res2: .byte 0
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res3: .addr 0
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.endproc
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.endproc
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;;; ------------------------------------------------------------
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.proc install
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src := install_src
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