emailler/drivers/atrinput.s

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.include "atari.inc"
.export get_key
.export check_for_abort_key
.export get_key_if_available
.export get_key_ip65
.export abort_key
.exportzp abort_key_default = 1
.exportzp abort_key_disable = 0
.import ip65_process
.import print_a
.data
abort_key: .byte 1
; keyboard translation tables for combinations not handled or supported by the ROM
; scan codes
special_key_table:
.byte $b5 ; Ctrl-8
.byte $f5 ; Shift-Ctrl-8
.byte $a0 ; Ctrl-,
.byte $e0 ; Shift-Ctrl-,
.byte $a6 ; Ctrl-/
.byte $e6 ; Shift-Ctrl-/
.byte $a2 ; Ctrl-.
.byte $e2 ; Shift-Ctrl-.
.byte $b3 ; Ctrl-7
.byte $f3 ; Shift-Ctrl-7
.byte $ce ; Shift-Ctrl--
.byte $a1 ; Ctrl-<Space>
.byte $e1 ; Shift-Ctrl-<Space>
.byte $b0 ; Ctrl-9
.byte $f0 ; Shift-Ctrl-9
.byte $b2 ; Ctrl-0
.byte $f2 ; Shirt-Ctrl-0
.byte $ed ; Shirt-Ctrl-T
.byte $de ; Shirt-Ctrl-2
special_key_table_len = * - special_key_table
; return values for scan codes
special_key_table2:
.byte $00 ; Ctrl-8 ==> Ctrl-@
.byte $00 ; Shift-Ctrl-8 ==> Ctrl-@
.byte $1b ; Ctrl-, ==> Ctrl-[
.byte $1b ; Shift-Ctrl-, ==> Ctrl-[
.byte $9c ; Ctrl-/ ==> Ctrl-\ ($1c already used for cursor up, ATURW)
.byte $9c ; Shift-Ctrl-/ ==> Ctrl-\
.byte $9d ; Ctrl-. ==> Ctrl-] ($1d already used for cursor down, ATDRW)
.byte $9d ; Shift-Ctrl-. ==> Ctrl-]
.byte $9e ; Ctrl-7 ==> Ctrl-^ ($1e already used for cursor left, ATLRW)
.byte $60 ; Shift-Ctrl-7 ==> `
.byte $9f ; Shift-Ctrl-- ==> Ctrl-_ ($1f already used for cursor right, ATRRW)
.byte $00 ; Ctrl-<Space> ==> Ctrl-@
.byte $00 ; Shift-Ctrl-<Space> ==> Ctrl-@
.byte $7b ; Ctrl-9 ==> {
.byte $7b ; Shift-Ctrl-9 ==> {
.byte $fd ; Ctrl-0 ==> }
.byte $fd ; Shift-Ctrl-0 ==> }
.byte $9a ; Shift-Ctrl-T ==> ~
.byte $9a ; Shift-Ctrl-2 ==> ~
; translations $9c..$9f -> $1c..$1f, $9e -> $7e, and $fd -> $7d will be done in atrvt100.s
.bss
; uncomment for debugging all CH_save related stuff
;CH_save: .res 1
.code
; inputs: none
; outputs: A contains ASCII value of key just pressed
get_key:
lda #0
sta CRSINH ; cursor on
; according to "Mapping the Atari", a change to CRSINH will only be in effect after the next cursor movement,
; so we move the cursor one to the left and then one to the right (to keep its original position)
lda #ATLRW
jsr print_a
lda #ATRRW
jsr print_a
@loop:
jsr get_key_if_available
bcc @loop
ldy #1
sty CRSINH ; cursor on
tay ; save key
; see above comment wrt. "Mapping the Atari"
lda #ATLRW
jsr print_a
lda #ATRRW
jsr print_a
tya ; restore key
rts
; inputs: none
; outputs: sec if key pressed, clear otherwise
; A contains ASCII value of key just pressed
get_key_if_available:
lda BRKKEY
bne @no_abort
dec BRKKEY
lda #$03 ; ^C
bne @done ; jump always
@no_abort:
lda HELPFG ; HELP key? (to be 100% correct we should check for XL-type machine before...)
cmp #17 ; HELP alone
beq @help
cmp #81 ; Shift-HELP
beq @help
cmp #145 ; Control-HELP
bne @no_help
@help:
lda #0
sta HELPFG ; clear HELPFG
lda #$fc ; pseudo key code, handled in atrvt100.s
bne @done
@no_help:
lda CH ; keyboard input (scan code)
cmp #255 ; was a key pressed?
beq nokey ; 255 means "no"
; sta CH_save ; remember keyboard scan code (debugging)
bpl @call_k ; Ctrl wasn't pressed, continue with ROM
jsr handle_special_keys
bcs @done ; keypress was handled
@call_k:
lda #0
sta INVFLG ; never input an inverse char
; ideas from cc65's cgetc.s
lda #12
sta ICAX1Z
jsr getkey_k
@done:
ldx #255 ; if K: handler hasn't been called, "consume" the key press
stx CH ; and clear the zero flag which is a return value
; ldx CH_save ; for debugging purposes, return the scan code in X
sec
rts
nokey:
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clc
rts
; inputs: A - keycode (CH)
; outputs: A - char, CF=0 if regular ROM handling is needed
handle_special_keys:
ldx #special_key_table_len-1
@lookup:
cmp special_key_table,x
beq @found
dex
bpl @lookup
clc
rts
@found:
lda special_key_table2,x
sec
rts
; call "short-cut" handler of K:
getkey_k:
lda KEYBDV+5
pha
lda KEYBDV+4
pha
rts
; process inbound ip packets while waiting for a keypress
get_key_ip65:
jsr ip65_process
jsr get_key_if_available
bcc get_key_ip65
rts
; check whether the abort key is being pressed
; inputs: none
; outputs: sec if abort key pressed, clear otherwise
check_for_abort_key:
lda abort_key ; is "abort" enabled?
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beq nokey ; no
lda BRKKEY
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bne nokey
dec BRKKEY
sec
rts
;-- LICENSE FOR atrinputs.s --
; The contents of this file are subject to the Mozilla Public License
; Version 1.1 (the "License"); you may not use this file except in
; compliance with the License. You may obtain a copy of the License at
; http://www.mozilla.org/MPL/
;
; Software distributed under the License is distributed on an "AS IS"
; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
; License for the specific language governing rights and limitations
; under the License.
;
; The Original Code is ip65.
;
; The Initial Developer of the Original Code is Jonno Downes,
; jonno@jamtronix.com.
; Portions created by the Initial Developer are Copyright (C) 2009
; Jonno Downes. All Rights Reserved.
; -- LICENSE END --