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https://github.com/deater/dos33fsprogs.git
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tfv: transparent sprite mostly working
This commit is contained in:
Vince Weaver
parent
4d846e778b
commit
37cd697d77
BIN
tfv/tfv.dsk
BIN
tfv/tfv.dsk
Binary file not shown.
298
tfv/tfv.s
298
tfv/tfv.s
@ -1,14 +1,22 @@
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.define EQU =
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KEYPRESS EQU $C000
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KEYRESET EQU $C010
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;; SOFT SWITCHES
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GR EQU $C050
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TEXT EQU $C051
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FULLGR EQU $C052
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TEXTGR EQU $C053
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PAGE0 EQU $C054
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PAGE1 EQU $C055
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LORES EQU $C056
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HIRES EQU $C057
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GR EQU $C050
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TEXT EQU $C051
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FULLGR EQU $C052
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TEXTGR EQU $C053
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PAGE0 EQU $C054
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PAGE1 EQU $C055
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LORES EQU $C056
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HIRES EQU $C057
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PADDLE_BUTTON0 EQU $C061
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PADDL0 EQU $C064
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PTRIG EQU $C070
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;; MONITOR ROUTINES
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HLINE EQU $F819 ;; HLINE Y,$2C at A
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@ -38,15 +46,20 @@ H2 EQU $2C
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V2 EQU $2D
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MASK EQU $2E
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COLOR EQU $30
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FIRST EQU $F0
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TEMP EQU $FA
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RUN EQU $FA
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TEMP2 EQU $FB
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INL EQU $FC
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INH EQU $FD
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OUTL EQU $FE
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OUTH EQU $FF
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FIRST EQU $F0
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LASTKEY EQU $F1
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PADDLE_STATUS EQU $F2
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XPOS EQU $F3
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YPOS EQU $F4
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TEMP EQU $FA
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RUN EQU $FA
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TEMP2 EQU $FB
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TEMPY EQU $FB
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INL EQU $FC
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INH EQU $FD
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OUTL EQU $FE
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OUTH EQU $FF
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;=============================
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; set low-res graphics, page 0
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@ -72,12 +85,61 @@ OUTH EQU $FF
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jsr gr_copy
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lda #20
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sta YPOS
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lda #20
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sta XPOS
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main_loop:
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jsr gr_copy
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jsr put_sprite
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jsr wait_until_keypressed
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lda LASTKEY
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cmp #('Q')
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beq exit
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cmp #('I')
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bne check_down
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dec YPOS
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dec YPOS
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check_down:
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cmp #('M')
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bne check_left
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inc YPOS
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inc YPOS
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check_left:
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cmp #('J')
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bne check_right
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dec XPOS
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check_right:
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cmp #('K')
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bne check_done
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inc XPOS
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check_done:
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jmp main_loop
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exit:
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lda #$4
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sta BASH
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lda #$0
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sta BASL ; restore to 0x400 (page 0)
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; copy to 0x400 (page 0)
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; call home
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jsr HOME
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; Return to BASIC?
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rts
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@ -205,6 +267,7 @@ set_gr_page0:
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;=========================================================
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; for now copy 0xc00 to 0x400
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; 2 + 8*38 + 4*80*23 + 4*120*26 + 13 = 20,159 = 20ms = 50Hz
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;
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gr_copy:
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ldx #0 ; set y to zero ; 2
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@ -246,6 +309,202 @@ gr_copy_line_done:
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bne gr_copy_loop ; if not, loop ; 3
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rts ; 6
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;==========================================================
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; Wait until keypressed
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;==========================================================
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;
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wait_until_keypressed:
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lda KEYPRESS ; check if keypressed
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bpl wait_until_keypressed ; if not, loop
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jmp figure_out_key
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;==========================================================
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; Get Key
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;==========================================================
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;
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get_key:
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check_paddle_button:
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; check for paddle button
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bit PADDLE_BUTTON0
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bpl no_button
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lda #' '+128
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jmp save_key
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no_button:
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lda KEYPRESS
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bpl no_key
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figure_out_key:
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cmp #' '+128 ; the mask destroys space
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beq save_key ; so handle it specially
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and #$5f ; mask, to make upper-case
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check_right_arrow:
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cmp #$15
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bne check_left_arrow
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lda #'K'
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check_left_arrow:
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cmp #$08
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bne check_up_arrow
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lda #'J'
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check_up_arrow:
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cmp #$0B
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bne check_down_arrow
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lda #'I'
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check_down_arrow:
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cmp #$0A
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bne check_escape
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lda #'M'
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check_escape:
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cmp #$1B
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bne save_key
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lda #'Q'
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jmp save_key
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no_key:
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bit PADDLE_STATUS
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bpl no_key_store
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; check for paddle action
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; code from http://web.pdx.edu/~heiss/technotes/aiie/tn.aiie.06.html
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inc PADDLE_STATUS
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lda PADDLE_STATUS
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and #$03
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beq check_paddles
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jmp no_key_store
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check_paddles:
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lda PADDLE_STATUS
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and #$80
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sta PADDLE_STATUS
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ldx #$0
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LDA PTRIG ;TRIGGER PADDLES
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LDY #0 ;INIT COUNTER
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NOP ;COMPENSATE FOR 1ST COUNT
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NOP
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PREAD2: LDA PADDL0,X ;COUNT EVERY 11 uSEC.
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BPL RTS2D ;BRANCH WHEN TIMED OUT
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INY ;INCREMENT COUNTER
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BNE PREAD2 ;CONTINUE COUNTING
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DEY ;COUNTER OVERFLOWED
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RTS2D: ;RETURN W/VALUE 0-255
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cpy #96
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bmi paddle_left
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cpy #160
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bmi no_key_store
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lda #'K'
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jmp save_key
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paddle_left:
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lda #'J'
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jmp save_key
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no_key_store:
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lda #0 ; no key, so save a zero
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save_key:
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sta LASTKEY ; save the key to our buffer
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bit KEYRESET ; clear the keyboard buffer
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rts
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;=============================================
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; put_sprite
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;=============================================
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put_sprite:
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lda #>tb1_sprite ; hardcoded for tb1 for now
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sta INH
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lda #<tb1_sprite
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sta INL
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ldy #0 ; byte 0 is xsize
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lda (INL),Y
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sta CH
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iny
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lda (INL),Y ; byte 1 is ysize
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sta CV
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iny
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lda YPOS ; make a copy of ypos
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sta TEMPY ; as we modify it
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put_sprite_loop:
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sty TEMP ; save sprite pointer
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ldy TEMPY
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lda gr_offsets,Y ; lookup low-res memory address ; 5
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clc
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adc XPOS ; add in xpos
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sta OUTL ; store out low byte of addy ; 3
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lda gr_offsets+1,Y ; look up high byte ; 5
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sta OUTH ; and store it out ; 3
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ldy TEMP ; restore sprite pointer ; 3
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ldx CH
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put_sprite_pixel:
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lda (INL),Y ; get sprite colors
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iny ; increment sprite pointer
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sty TEMP ; save sprite pointer
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ldy #$0
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cmp #$0 ; if all zero, transparent
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beq put_sprite_done_draw ; don't draw it
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sta COLOR ; save color for later
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and #$f0 ; check if top nibble zero
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bne put_sprite_bottom ; if not skip ahead
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lda #$0f ; setup mask
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sta MASK
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bmi put_sprite_mask
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put_sprite_bottom:
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lda COLOR ; re-load color
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and #$0f ; check if bottom nibble zero
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bne put_sprite_all ; if not, skip ahead
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lda #$0f
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sta MASK ; setup mask
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put_sprite_mask:
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lda (OUTL),Y ; get color at output
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and MASK ; mask off unneeded part
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ora COLOR ; or the color in
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sta (OUTL),Y ; store it back
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jmp put_sprite_done_draw ; we are done
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put_sprite_all:
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lda COLOR ; load color
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sta (OUTL),Y ; and write it out
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put_sprite_done_draw:
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ldy TEMP ; restore sprite pointer
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inc OUTL ; increment output pointer
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dex ; decrement x counter
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bne put_sprite_pixel ; if not done, keep looping
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inc TEMPY ; each line has two y vars
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inc TEMPY
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dec CV ; decemenet total y count
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bne put_sprite_loop ; loop if not done
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rts ; return
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; waste memory with a lookup table
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; maybe faster than using GBASCALC?
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gr_offsets:
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@ -253,6 +512,11 @@ gr_offsets:
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.word $428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8
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.word $450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0
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tb1_sprite:
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.byte $8,$4
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.byte $55,$50,$00,$00,$00,$00,$00,$00
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.byte $55,$55,$55,$00,$00,$00,$00,$00
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.byte $ff,$1f,$4f,$2f,$ff,$22,$20,$00
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.byte $5f,$5f,$5f,$5f,$ff,$f2,$f2,$f2
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.include "title.inc"
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