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https://github.com/a2stuff/prodos-drivers.git
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This commit is contained in:
Joshua Bell
parent
7042ad9901
commit
ba96487609
102
b.s
102
b.s
@ -26,6 +26,9 @@ SETINV := $FE80
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SETNORM := $FE84
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ZP_HPOS := $24
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ZP_TMASK := $32
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COL80HPOS := $057B
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ASCII_TAB := $9
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@ -69,8 +72,10 @@ L2000: jmp install_and_quit
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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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page_start := $73
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top_row := 2
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bottom_row := 21
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cld
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lda ROMINNW
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@ -224,15 +229,15 @@ L1129: MLI_CALL CLOSE, close_params
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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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jsr ascii_cout
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inx
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bne :-
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L1153: stz current_entry
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stz current_line
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stz page_start
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lda num_entries
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beq keyboard_loop
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cmp #rows_per_screen
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cmp #bottom_row
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bcc L1161
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lda #$14
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L1161: sta $6A
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@ -249,19 +254,23 @@ L116F: jsr draw_current_line
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stz current_entry
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beq draw_current_line_inv
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;;; ------------------------------------------------------------
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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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beq draw_current_line_inv ; first one? just redraw
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dec current_entry ; go to previous
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lda $25
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cmp #$02
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cmp #top_row
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bne draw_current_line_inv
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dec current_line
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dec page_start
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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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;;; ------------------------------------------------------------
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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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@ -270,13 +279,15 @@ L116F: jsr draw_current_line
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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 #rows_per_screen
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cmp #bottom_row
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bne draw_current_line_inv
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inc current_line
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inc page_start
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lda #$17 ; code output ???
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;; fall through
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.endproc
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;;; ------------------------------------------------------------
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draw_current_line_with_char:
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jsr COUT
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@ -287,28 +298,38 @@ draw_current_line_inv:
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;;; ------------------------------------------------------------
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keyboard_loop:
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.proc 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 num_entries
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beq L11CB
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beq :+ ; no up/down/return if empty
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cmp #HI(ASCII_RETURN)
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beq on_return
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cmp #HI(ASCII_DOWN)
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beq on_down
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cmp #HI(ASCII_UP)
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beq on_up
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L11CB: cmp #HI(ASCII_TAB)
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: cmp #HI(ASCII_TAB)
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beq next_drive
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cmp #HI(ASCII_ESCAPE)
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bne keyboard_loop
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;; fall through
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.endproc
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;;; ------------------------------------------------------------
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.proc on_escape
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jsr L11DA
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dec $6B
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bra L11F1
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.endproc
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;;; ------------------------------------------------------------
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L11DA: ldx prefix
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L11DD: dex
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lda prefix,x
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@ -325,7 +346,9 @@ next_drive:
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L11F0: inx
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L11F1: jmp L1059
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on_return:
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;;; ------------------------------------------------------------
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.proc 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 current_entry
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@ -343,6 +366,10 @@ on_return:
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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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;; nope, system file, so...
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;; fall through
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.endproc
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;;; ------------------------------------------------------------
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@ -372,14 +399,18 @@ on_return:
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cout_string_hpos:
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sta ZP_HPOS
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cout_string:
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.proc cout_string
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lda help_string,y
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beq L1257
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beq done
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jsr COUT
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iny
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bne cout_string
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L1257: rts
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done: rts
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.endproc
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;;; ------------------------------------------------------------
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;; Compute offset to name in directory listing ???
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L1258: stz $6D
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txa
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asl a
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@ -400,37 +431,44 @@ L1258: stz $6D
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sta $69
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rts
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;;; ------------------------------------------------------------
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draw_current_line:
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lda #$02
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sta $057B
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ldx current_entry
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lda #2 ; hpos = 2
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sta COL80HPOS
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ldx current_entry ; vpos = entry - page_start + 2
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txa
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sec
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sbc current_line
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sbc page_start
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inc a
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inc a
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jsr MON_TABV
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lda $74,x
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bmi L1299
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stz $057B
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lda $32
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stz COL80HPOS
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lda ZP_TMASK
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pha
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ldy #(folder_string - string_start) ; Draw folder glyphs
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jsr cout_string
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pla
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sta $32
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sta ZP_TMASK
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L1299: jsr L12A9
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jsr L1258
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L129F: iny
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lda ($6C),y
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jsr L12AF
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jsr ascii_cout
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cpy $69
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bcc L129F
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L12A9: lda #$A0
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bne L12B1
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L12AD: lda #$99
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L12AF: ora #$80
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L12B1: jmp COUT
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L12A9: lda #HI(' ')
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bne cout ; implicit RTS
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L12AD: lda #$99 ; Ctrl+Y ??
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;; Sets high bit before calling COUT
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ascii_cout:
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ora #$80
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cout: jmp COUT
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;;; ------------------------------------------------------------
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