mirror of
https://github.com/deater/dos33fsprogs.git
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246 lines
3.6 KiB
ArmAsm
246 lines
3.6 KiB
ArmAsm
; Print-shop Style THINKING
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; by Vince `deater` Weaver <vince@deater.net>
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.include "zp.inc"
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.include "hardware.inc"
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; 0-------------------------
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; 0 1111111111111111111111 0
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; 0 1 22222222222222222221 0
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; if XX < YY COL++
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;if XX > 39-YY COL--
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COL = $F0
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XSTART = $F1
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XSTOP = $F2
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YSTART = $F3
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YSTOP = $F4
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OFFSET = $F5
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CURRENT = $F6
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BITMAP_PTR = $F7
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BASE = $F8
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XSAVE = $F9
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SAVED_YY= $F9
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YSAVE = $FA
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SAVED_XX= $FA
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thinking:
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jsr SETGR ; set lo-res 40x40 mode
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; A=$D0 afterward
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big_loop:
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ldx #0 ; reset YY
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stx BITMAP_PTR ; reset bitmap pointer to 0
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yloop:
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txa
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jsr GBASCALC ; take Y-coord/2 in A, put address in GBASL/H ( a trashed, C clear)
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;=======================
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ldy #0
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xloop:
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; this is only jumped to every 8th XX
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inc_pointer:
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inc BITMAP_PTR
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stx XSAVE
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ldx BITMAP_PTR
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lda thinking_data-1-35,X
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sta CURRENT
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ldx XSAVE
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thinking_xloop:
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; this is called every XX
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stx XSAVE
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sty YSAVE ; save Y (XX)
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; skip if out of range
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cpx #7
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bcc draw_color
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cpx #14
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bcs draw_color
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ror CURRENT
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bcs skip_color
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draw_color:
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lda COL ; set starting color
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and #$7
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tay
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lda color_lookup,Y ; lookup color
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ldy YSAVE ; restore Y (XX)
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sta (GBASL),Y
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skip_color:
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no_draw:
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;==================================
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; adjust colors to make boxes
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; 0000000000000000
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; 0111111111111110
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; 0122222222222210
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; XX is in Y (currently also in YSAVE)
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; YY is in X (currently also in XSAVE)
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; if XX is < 10, check for inc
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; if XX is > 30 check for dex
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; else, no adjust
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ldx SAVED_YY ; YY
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ldy SAVED_XX ; XX
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cpy #10 ; is XX < 10
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bcc color_adjust_up ; then potentially adjust UP
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cpy #30 ; is XX > 30
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bcs color_adjust_down ; then potentially adjust down
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bcc color_adjust_none ; else, do nothing
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color_adjust_up:
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; if XX < YY then inc color
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; if XX >= YY then do nothing
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cpy SAVED_YY ; compare XX to YY
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bcs col_same ; bge do nothing
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col_inc:
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inc COL
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col_same:
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jmp color_adjust_none
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color_adjust_down:
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lda #39
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sec
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sbc XSAVE
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sta XSAVE
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cpy XSAVE ; compare XX to YY
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; if XX > 39-YY then inc color
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bcc col_down_same
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col_dec:
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dec COL
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col_down_same:
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ldy YSAVE
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; fallthrough
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color_adjust_none:
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;============================
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; inc XX for next pixel
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iny
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cpy #40
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beq done_done
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tya
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and #$7
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beq inc_pointer
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bne thinking_xloop
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done_done:
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;=======================
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; cpx #9
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; beq blarch
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; bcc blurgh
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; inc COL
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; jmp blarch
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;blurgh:
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; dec COL
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;blarch:
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;=======================
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; move to next line
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inc COL
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inx
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cpx #20
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bne yloop
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;==========================
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; done drawing rainbow box
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;==========================
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;==========================
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; flip pages
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;==========================
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;===================
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; increment color
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; after loop we are +10
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; so -1 actually means increment 1 (because we mod 8 it)
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; inc COL
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; inc COL
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dec COL
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dec COL
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;===================
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; WAIT
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lda #255
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jsr WAIT ; A = 0 at end
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beq big_loop
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;0 1 2 3 3
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;01234567|89012345|67890123|45678901|23456789
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; ***** *| * * * | * * |* * * |* ***
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; * *| * * **| * * *| * ** |* * *
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; * *| * * **| * * * | * ** |* *
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; * *|*** * * |* * ** | * * * |* *
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; * *| * * * | ** * * | * * *|* * **
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; * *| * * * | ** * *| * * *|* * *
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; * *| * * * | * * |* * * |* ****
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;
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; 7*5 bytes = 35 bytes
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color_lookup:
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; magenta, pink, orange, yellow, lgreen, aqua, mblue, lblue
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.byte $33,$BB,$99,$DD,$CC,$EE,$66,$77
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thinking_data:
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.byte $BE,$54,$14,$15,$39
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.byte $88,$D4,$94,$34,$45
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.byte $88,$D4,$54,$34,$05
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.byte $88,$57,$35,$54,$05
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.byte $88,$54,$56,$94,$65
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.byte $88,$54,$96,$94,$45
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.byte $88,$54,$14,$15,$79
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; for apple II bot entry at $3F5
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; at +8A, so 36B
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jmp thinking
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