a2d/desktop/desktop_lc.s

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;;; ============================================================
;;; DeskTop - Main Memory Segment
;;;
;;; Compiled as part of desktop.s
;;; ============================================================
;;; ============================================================
;;; Segment loaded into AUX $D000-$FFFF
;;; ============================================================
.org $D000
;;; Constants needed in both main and aux
menu_id_apple := 1
menu_id_file := 2
menu_id_view := 4
menu_id_special := 5
menu_id_startup := 8
menu_id_selector := 3
;;; Various routines callable from MAIN
;;; ============================================================
;;; MGTK call from main>aux, call in Y, params at (X,A)
.proc MGTK_RELAY_IMPL
.assert * = MGTK_RELAY, error, "Entry point mismatch"
sty addr-1
stax addr
sta RAMRDON
sta RAMWRTON
MGTK_CALL 0, 0, addr
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
;;; SET_POS with params at (X,A) followed by DRAW_TEXT call
.proc SETPOS_DRAWTEXT_RELAY
stax addr
sta RAMRDON
sta RAMWRTON
MGTK_CALL MGTK::MoveTo, 0, addr
MGTK_RELAY_CALL MGTK::DrawText, text_buffer2
tay
sta RAMRDOFF
sta RAMWRTOFF
tya
rts
.endproc
;;; ============================================================
;;; DESKTOP call from main>aux, call in Y params at (X,A)
.proc DESKTOP_RELAY_IMPL
.assert * = DESKTOP_RELAY, error, "Entry point mismatch"
sty addr-1
stax addr
sta RAMRDON
sta RAMWRTON
DESKTOP_CALL 0, 0, addr
tay
sta RAMRDOFF
sta RAMWRTOFF
tya
rts
.endproc
;;; ============================================================
;;; Used/Free icon map (Aux $1F80 - $1FFF)
free_icon_map := $1F80
;;; Find first available free icon in the map; if
;;; available, mark it and return index+1.
.proc DESKTOP_ALLOC_ICON
sta RAMRDON
sta RAMWRTON
ldx #0
loop: lda free_icon_map,x
beq :+
inx
cpx #$7F
bne loop
rts
: inx
txa
dex
tay
lda #1
sta free_icon_map,x
sta RAMRDOFF
sta RAMWRTOFF
tya
rts
.endproc
;;; Mark the specified icon as free
.proc DESKTOP_FREE_ICON
tay
sta RAMRDON
sta RAMWRTON
dey
lda #0
sta free_icon_map,y
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
;;; Copy data to/from buffers (see cached_window_id / cached_window_icon_list / window_icon_count_table/2) ???
.proc DESKTOP_COPY_BUF_IMPL
ptr := $6
from:
lda #$80
bne :+ ; always
to:
lda #$00
: sta flag
jsr desktop_main_push_pointers
lda cached_window_id
asl a ; * 2
tax
copy16 window_icon_count_table,x, ptr
sta RAMRDON
sta RAMWRTON
bit flag
bpl set_length
;; assign length from cached_window_icon_list
lda cached_window_icon_count
ldy #0
sta (ptr),y
jmp set_copy_ptr
;; assign length to cached_window_icon_list
set_length:
ldy #0
lda (ptr),y
sta cached_window_icon_count
set_copy_ptr:
copy16 window_icon_list_table,x, ptr
bit flag
bmi copy_from
;; copy into cached_window_icon_list
ldy #0 ; flag clear...
: cpy cached_window_icon_count
beq done
lda (ptr),y
sta cached_window_icon_list,y
iny
jmp :-
;; copy from cached_window_icon_list
copy_from:
ldy #0
: cpy cached_window_icon_count
beq done
lda cached_window_icon_list,y
sta (ptr),y
iny
jmp :-
done: sta RAMRDOFF
sta RAMWRTOFF
jsr desktop_main_pop_pointers
rts
flag: .byte 0
rts ; ???
.endproc
DESKTOP_COPY_FROM_BUF := DESKTOP_COPY_BUF_IMPL::from
DESKTOP_COPY_TO_BUF := DESKTOP_COPY_BUF_IMPL::to
;;; ============================================================
;;; Assign active state to active_window_id window
.proc DESKTOP_ASSIGN_STATE
src := $6
dst := $8
sta RAMRDON
sta RAMWRTON
MGTK_CALL MGTK::GetPort, src ; grab window state
lda active_window_id ; which desktop window?
asl a
tax
copy16 win_table,x, dst
lda dst
clc
adc #20 ; add offset
sta dst
bcc :+
inc dst+1
: ldy #35 ; copy 35 bytes into window state
loop: lda (src),y
sta (dst),y
dey
bpl loop
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
;;; From MAIN, load AUX (X,A) into A
.proc DESKTOP_AUXLOAD
stx op+2
sta op+1
sta RAMRDON
sta RAMWRTON
op: lda dummy1234
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
;;; From MAIN, show alert
;;; ...with prompt #0
.proc DESKTOP_SHOW_ALERT0
ldx #$00
;; fall through
.endproc
;;; ... with prompt # in X
.proc DESKTOP_SHOW_ALERT
sta RAMRDON
sta RAMWRTON
jsr desktop_aux::show_alert_indirection
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
.assert * = $D166, error, "Segment length mismatch"
PAD_TO $D200
.include "desktop_res.s"
.assert * = $FFBA, error, "Segment length mismatch"
PAD_TO $10000