2020/c64/menu.asm

// vim: filetype=kickass

.const PA = $dc00
.const PB = $dc01
.const DDRA = $dc02
.const DDRB = $dc03

* = * "Menu Routines"
//
// draw_menu
//
draw_menu:
    lda $d018
    and #%11110001
    ora #%00000100
    sta $d018

    ldy #$fa + 1
    sty $d020
    sty $d021
!:
    // TODO Compression for the characters
    lda menu_characters + $0000 - 1, y
    sta SCREEN_RAM      + $0000 - 1, y
    lda menu_characters + $00fa - 1, y
    sta SCREEN_RAM      + $00fa - 1, y
    lda menu_characters + $01f4 - 1, y
    sta SCREEN_RAM      + $01f4 - 1, y
    lda menu_characters + $02ee - 1, y
    sta SCREEN_RAM      + $02ee - 1, y

    lda menu_colors + $0000 - 1, y
    sta COLOR_RAM   + $0000 - 1, y
    lsr; lsr; lsr; lsr
    sta COLOR_RAM   + $00fa - 1, y

    lda menu_colors + $00fa - 1, y
    sta COLOR_RAM   + $01f4 - 1, y
    lsr; lsr; lsr; lsr
    sta COLOR_RAM   + $02ee - 1, y

    dey
    bne !-

    rts

//
// menu_update
//
menu_update:
    lda PA
    lsr
    bcs !not_up+
        lda $07
        sec
        sbc #8
        cmp #49
        bcc !wait+
        sta $07
        jmp !wait+
    !not_up:

    lsr
    bcs !not_down+
        lda $07
        clc
        adc #08
        cmp #242
        bcs !wait+
        sta $07
        jmp !wait+
    !not_down:

    lsr
    lsr
    lsr
    bcs !done+
        sei
        jsr clear_screen

        lda $07
        lsr; lsr; lsr
        sec
        sbc #6
        asl
        tay

        // Modify JSR instruction to jump to the right day
        lda !days+, y
        sta !jump+ + 1
        lda !days+ + 1, y
        sta !jump+ + 2

    !jump:
        jsr !done+

!wait:
    ldy #80
    ldx #0
    !:
        !:
            dex
        bne !-
        dey
    bne !--

!done:
    rts

!days:
    .word day01 // 1
    .word 0     // 2
    .word 0     // 3
    .word 0     // 4
    .word day05 // 5
    .word 0     // 6
    .word 0     // 7
    .word 0     // 8
    .word 0
    .word 0     // 9
    .word 0
    .word 0
    .word 0     // 15
    .word 0
    .word 0     // 10
    .word 0     // 14
    .word 0
    .word 0     // 11
    .word 0     // 13
    .word 0
    .word 0     // 12
    .word 0
    .word 0
    .word 0
    .word 0

//
// setup_interrupt
//
setup_interrupt:
    sei

    SetRasterInterrupt(menu_irq)
    move_16_imm($fffa, nmi_nop)

    lda #$7f
    sta $dc0d
    sta $dd0d

    lda #$01
    sta $d019
    sta $d01a

    lda #$35
    sta $01

    cli
    rts

menu_irq:
    pha
    txa
    pha
    tya
    pha

    StabilizeRaster()
    ldy #11
    sty $d020
    sty $d021

    ldy #90
!:
    dey
    bne !-

    ldy #0
    sty $d021
    sty $d020

    SetRasterInterrupt(menu_irq)

    asl $d019

    pla
    tay
    pla
    tax
    pla
    rti

nmi_nop:
    rti

.macro SetRasterInterrupt(address) {
    move_16_imm($fffe, address)

    lda $d011
    and #$7f
    sta $d011

    lda $07
    sta $d012
}

.macro StabilizeRaster() {
    move_16_imm($fffe, stabilized_irq)
    inc $d012

    asl $d019

    tsx

    cli
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop

stabilized_irq:
    txs
    sei

    ldx #6
!:
    dex
    bne !-
    bit $00

    lda $d012
    cmp $d012
    beq *+2
}

    .align $0100
    * = * "Menu Data"
menu_characters:
    .byte $20,$20,$20,$20,$6f,$6f,$6f,$52,$52,$52,$46,$46,$46,$46,$42,$46,$46,$46,$46,$52,$52,$52,$6f,$6f,$6f,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$31,$2a,$2a
    .byte $45,$45,$77,$77,$20,$2e,$27,$20,$20,$2d,$20,$20,$2d,$20,$20,$4d,$2d,$20,$2e,$27,$27,$68,$20,$68,$20,$77,$77,$45,$45,$44,$43,$40,$46,$52,$6f,$20,$20,$32,$20,$20
    .byte $68,$20,$20,$68,$20,$27,$2e,$27,$2e,$20,$2d,$20,$20,$20,$2d,$20,$4d,$20,$2d,$27,$27,$3a,$20,$20,$68,$20,$68,$20,$20,$20,$68,$20,$20,$68,$20,$20,$20,$33,$20,$20
    .byte $20,$20,$68,$20,$68,$20,$20,$68,$20,$27,$27,$2e,$2e,$27,$27,$27,$64,$1b,$1d,$2e,$27,$20,$20,$68,$20,$20,$20,$20,$68,$20,$20,$20,$68,$20,$68,$20,$20,$34,$20,$20
    .byte $27,$2e,$20,$68,$20,$20,$68,$20,$20,$68,$20,$20,$64,$64,$6f,$4e,$63,$27,$27,$20,$20,$68,$20,$20,$68,$20,$20,$68,$20,$20,$20,$20,$20,$68,$20,$20,$20,$35,$2a,$2a
    .byte $27,$20,$20,$2e,$2e,$6f,$6f,$6f,$6f,$6f,$4e,$77,$63,$63,$20,$20,$68,$20,$20,$68,$20,$20,$68,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$36,$20,$20
    .byte $68,$20,$3a,$1b,$1d,$27,$2e,$20,$20,$20,$68,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$37,$20,$20
    .byte $20,$20,$20,$27,$2e,$4d,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$68,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$38,$20,$20
    .byte $20,$20,$68,$20,$20,$20,$4d,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$68,$20,$4d,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$39,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$4d,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$68,$20,$20,$2e,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$4d,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$3a,$27,$27,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$4d,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$6f,$6f,$64,$64,$68,$20,$27,$2e,$20,$2c,$20,$31,$35,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$4d,$20,$68,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$68,$20,$63,$63,$4d,$20,$20,$3a,$20,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$4d,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$2e,$4d,$27,$20,$2c,$20,$20,$31,$30,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$4d,$20,$20,$20,$2e,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$27,$2e,$1b,$1d,$20,$2c,$20,$31,$34,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$4d,$27,$27,$2c,$3a,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$64,$4e,$27,$2e,$2e,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$3a,$1b,$1d,$2e,$2e,$27,$20,$20,$20,$20,$20,$20,$20,$20,$20,$4e,$63,$68,$20,$20,$20,$27,$20,$31,$31,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$27,$27,$4d,$64,$64,$20,$20,$68,$20,$20,$20,$20,$20,$4e,$20,$20,$20,$20,$20,$20,$20,$20,$31,$33,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$63,$63,$4d,$64,$64,$20,$20,$20,$20,$4e,$68,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$63,$63,$4d,$64,$64,$4e,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$31,$32,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$63,$63,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$68,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20
    .byte $20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$2e,$20,$2e,$2e,$20,$20,$20,$2e,$27,$20,$2e,$2e,$20,$20,$20,$20,$20,$20,$20,$20,$20

menu_colors:
    .byte $6f, $0e, $6e, $0e, $0e, $0e, $0e, $0e, $0e, $0e, $0e, $6e, $0e, $0e, $02, $0e, $0e, $0e, $0e, $0e  //  0;00 -  0;20 |  6;10 -  6;30
    .byte $0e, $0e, $0e, $0e, $0e, $00, $00, $f0, $00, $00, $00, $00, $00, $50, $50, $10, $e0, $6f, $07, $07  //  0;20 -  1;00 |  6;30 -  7;10
    .byte $0e, $0e, $0e, $0e, $0e, $01, $61, $0e, $0e, $61, $00, $00, $01, $00, $01, $01, $c1, $0e, $01, $01  //  1;00 -  1;20 |  7;10 -  7;30
    .byte $01, $06, $00, $c6, $0e, $0e, $0e, $fe, $0e, $0e, $0e, $0e, $6e, $0e, $0e, $00, $10, $0f, $00, $60  //  1;20 -  2;00 |  7;30 -  8;10
    .byte $06, $0e, $0e, $06, $0e, $01, $01, $01, $01, $0e, $01, $00, $00, $00, $01, $0e, $01, $0e, $01, $b1  //  2;00 -  2;20 |  8;10 -  8;30
    .byte $01, $01, $00, $00, $06, $00, $06, $00, $00, $00, $06, $03, $03, $06, $03, $60, $00, $1f, $00, $00  //  2;20 -  3;00 |  8;30 -  9;10
    .byte $0e, $0e, $06, $0e, $06, $0e, $0e, $06, $0e, $01, $01, $01, $01, $01, $01, $c1, $01, $01, $01, $01  //  3;00 -  3;20 |  9;10 -  9;30
    .byte $01, $00, $00, $c6, $00, $00, $00, $f0, $06, $00, $00, $00, $06, $0e, $06, $00, $00, $0f, $10, $00  //  3;20 -  4;00 |  9;30 - 10;10
    .byte $65, $05, $00, $06, $0e, $0e, $06, $0e, $0e, $06, $01, $01, $01, $01, $01, $01, $01, $01, $b1, $00  //  4;00 -  4;20 | 10;10 - 10;30
    .byte $00, $b6, $00, $00, $56, $00, $00, $06, $00, $00, $00, $00, $00, $06, $00, $00, $00, $0f, $07, $17  //  4;20 -  5;00 | 10;30 - 11;10
    .byte $05, $00, $00, $05, $05, $01, $01, $01, $01, $01, $01, $01, $01, $b1, $01, $00, $06, $00, $00, $06  //  5;00 -  5;20 | 11;10 - 11;30
    .byte $00, $50, $56, $50, $00, $00, $00, $00, $00, $06, $00, $00, $00, $00, $00, $00, $00, $0f, $00, $60  //  5;20 -  6;00 | 11;30 - 12;10
    .byte $16, $00, $05, $01, $01, $05, $05, $05, $00, $00                                                    //  6;00 -  6;10 | 12;10 - 12;20

    .byte $00, $00, $00, $00, $00, $01, $f1, $f1, $01, $0b, $00, $05, $05, $0e, $05, $00, $0b, $0b, $00, $00  // 12;20 - 13;00 | 18;30 - 19;10
    .byte $00, $00, $00, $00, $00, $00, $60, $10, $10, $10, $10, $11, $00, $06, $00, $00, $10, $60, $00, $00  // 13;00 - 13;20 | 19;10 - 19;30
    .byte $00, $0b, $00, $00, $60, $0b, $01, $01, $01, $01, $00, $00, $05, $0e, $0b, $00, $00, $00, $00, $00  // 13;20 - 14;00 | 19;30 - 20;10
    .byte $00, $00, $00, $00, $00, $00, $00, $00, $00, $06, $10, $10, $11, $10, $10, $10, $06, $00, $00, $00  // 14;00 - 14;20 | 20;10 - 20;30
    .byte $00, $00, $00, $01, $00, $00, $f0, $f0, $00, $05, $01, $05, $0e, $05, $00, $00, $0f, $0f, $00, $00  // 14;20 - 15;00 | 20;30 - 21;10
    .byte $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $60, $11, $10, $00, $00, $05, $00, $00  // 15;00 - 15;20 | 21;10 - 21;30
    .byte $00, $00, $60, $00, $00, $06, $00, $00, $00, $05, $05, $01, $01, $0e, $05, $00, $0f, $0f, $00, $00  // 15;20 - 16;00 | 21;30 - 22;10
    .byte $00, $00, $00, $00, $00, $00, $00, $60, $00, $10, $00, $06, $00, $00, $01, $05, $05, $05, $05, $00  // 16;00 - 16;20 | 22;10 - 22;30
    .byte $00, $06, $00, $00, $00, $00, $00, $00, $00, $01, $01, $05, $05, $05, $00, $00, $00, $00, $00, $00  // 16;20 - 17;00 | 22;30 - 23;10
    .byte $00, $00, $00, $00, $00, $00, $00, $00, $00, $10, $10, $10, $00, $05, $01, $01, $05, $05, $05, $00  // 17;00 - 17;20 | 23;10 - 23;30
    .byte $00, $00, $00, $00, $00, $00, $00, $00, $01, $01, $06, $00, $00, $00, $05, $00, $0f, $0f, $00, $00  // 17;20 - 18;00 | 23;30 - 24;10
    .byte $00, $00, $00, $00, $00, $00, $00, $00, $00, $50, $e0, $50, $50, $00, $05, $05, $51, $51, $01, $50  // 18;00 - 18;20 | 24;10 - 24;30
    .byte $50, $06, $00, $00, $00, $00, $00, $01, $00, $00                                                    // 18;20 - 18;30 | 24;30 - 25;00