Neo1: neo-layout.asm

;NEO-Layout für C64
;(C) 2005 Hanno Behrens (pebbles@schattenlauf.de)
;unter GPL
;Alpha-Release 0.1

        !to "neo-layout.prg"

        !source <C64/BASIC2.a>

        *=$0801

dest    =$c000

ptr1    =$f7
ptr2    =$f9
                
zp_pkeydec      =$028f
zp_keymap       =$f5
k_keydec        =$eb48
k_keytablen     =$41
k_keytab1       =$eb81
k_keytab2       =$ebc2
k_keytab3       =$ec03
k_keytab4       =$ec78

k_decode        =$eae0
        
;Header generieren
        !word endline           ;Zeiger auf nächste Zeile
        !word 2005              ;Zeilennummer
        +b_SYS
        !tx "2061",0
endline !word 0
;Ende Header

setup:  
        ldy #0                  ;kopiere neo nach dest
set1:   lda neoentry,y
        sta dest,y
        lda neoentry+$100,y
        sta dest+$100,y
        iny
        bne set1

        sei                     ;setze keydecoder
        lda #<dest
        sta zp_pkeydec
        lda #>dest
        sta zp_pkeydec+1
        cli
        rts     

neoentry:
        lda $028d               ;Flag Shift CTRL Commodore
        cmp #$03
        bne l1                  ;Zeiger auf Dekodiertabellen berechnen
        cmp $028e
        beq abfrage_default     
        lda $0291               ;Shift-Commodore erlaubt?
        bmi fertig              ;nein, zurück zur Dekodierung
        lda $d018               ;Shift/Commodore
        eor #$02                ;Umschaltung Klein/Großschreibung
        sta $d018
        jmp fertig
        
l1      asl
        cmp #$08
        bcc l2
        lda #$06
l2      tax
        lda tableptr-neoentry+dest,x
        sta zp_keymap           ;Zeiger auf Tastatur-Dekodiertabellen lesen
        lda tableptr-neoentry+dest+1,x
        sta zp_keymap+1

fertig: jmp k_decode            ;zurück zur Dekodierung

abfrage_default:
        lda #$7f
        sta $dc00
        rts

tableptr:       
        !word table1-neoentry+dest, table2-neoentry+dest
        !word table3-neoentry+dest, table4-neoentry+dest

        !ct pet
table1  ;Tastatur-Dekodierung, ungeshiftet
        !by $14, $0d, $1d, $88, $85, $86, $87, $11
;       !by "3", "w", "a", "4", "z", "s", "e", $01
        !by "3", "v", "u", "4", "k", "i", "l", $01
;       !by "5", "r", "d", "6", "c", "f", "t", "x"
        !by "5", "c", "a", "6", "@", "e", "w", ">"
;       !by "7", "y", "g", "8", "b", "h", "u", "v"
        !by "7", "<", "o", "8", "z", "s", "h", "p"
;       !by "9", "i", "j", "0", "m", "k", "o", "n"
        !by "9", "g", "n", "0", "m", "r", "f", "b"
;       !by "+", "p", "l", "-", ".", ":", "@", ","
        !by "+", "j", "t", "-", ".", "d", "/", ","
;       !by $5c, "*", ";", $13, $01, "=", $5e, "/"
        !by $5c, "*", "y", $13, $01, "=", $5e, "x"
        !by "1", $5f, $04, "2", " ", $02, "q", $03
        !by $ff 
table2  ;Tastatur-Dekodierung geshifted
        !by $94, $8d, $9d, $8c, $89, $8a, $8b, $91
;       !by "#", "W", "A", "$", "Z", "S", "E", $01
        !by "#", "V", "U", "$", "K", "I", "L", $01
;       !by "%", "R", "D", "&", "C", "F", "T", "X"
        !by "%", "C", "A", "&", $ba, "E", "W", "]"
;       !by "'", "Y", "G", "(", "B", "H", "U", "V"
        !by "'", "[", "O", "(", "Z", "S", "H", "P"
;       !by ")", "I", "J", "0", "M", "K", "O", "N"
        !by ")", "G", "N", "0", "M", "R", "F", "B"
;       !by $db, $d0, $cc, $dd, ">", "[", $ba, "<"
        !by $db, $d0, $cc, $dd, ":", "D", "?", ";"
;       !by $a9, $c0, "]", $93, $01, "=", $de, "?"
        !by $a9, $c0, "Y", $93, $01, $3d, $de, "X"
        !by $21, $5f, $04, $22, $a0, $02, "Q", $83
        !by $ff
        
table3  ;Tastatur-Dekodierung mit C=-Taste
        !by $94, $8d, $9d, $8c, $89, $8a, $8b, $91
        !by $96, $b3, $b0, $97, $ad, $ae, $b1, $01
        !by $98, $b2, $ac, $99, $bc, $bb, $a3, $bd
        !by $9a, $b7, $a5, $9b, $bf, $b4, $b8, $be
        !by $29, $a2, $b5, $30, $a7, $a1, $b9, $aa
        !by $a6, $af, $b6, $dc, $3e, $5b, $a4, $3c
        !by $a8, $df, $5d, $93, $01, $3d, $de, $3f
        !by $81, $5f, $04, $95, $a0, $02, $ab, $83
        !by $ff

table4  ;Tastatur-Dekodierung mit CTRL-Taste
        !by $ff, $ff, $ff, $ff, $ff, $ff, $ff, $ff
        !by $1c, $17, $01, $9f, $1a, $13, $05, $ff
        !by $9c, $12, $04, $1e, $03, $06, $14, $18
        !by $1f, $19, $07, $9e, $02, $08, $15, $16
        !by $12, $09, $0a, $92, $0d, $0b, $0f, $0e
        !by $ff, $10, $0c, $ff, $ff, $1b, $00, $ff
        !by $1c, $ff, $1d, $ff, $ff, $1f, $1e, $ff
        !by $90, $06, $ff, $05, $ff, $ff, $11, $ff
        !by $ff