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