Apple-2-SW/dos33fsprogs
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sprites: well a missile sort of appears

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we still have vapor lock, a plus
This commit is contained in:
Vince Weaver 2019-06-12 22:53:27 -04:00
parent 1b222d3025
commit cb33e23442
1 changed files with 111 additions and 17 deletions
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128
interlace_demo/sprites.s
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@ -1,6 +1,6 @@
; TODO
; + merge with spacebars code
; + make flame move (write to the sprite table directly)
; + make flame move (write to the sprite table directly) frame count+xor?
; + end of game, fly to the right
; + implement shooting with space bar
; + implement both blasts
@ -26,6 +26,7 @@ BLARGH = $69
DRAW_PAGE = $EE
FIRE_X = $F0
FIRE_Y = $F1
YPOS = $F3
YADD = $F4
@ -39,8 +40,12 @@ LEVEL_DONE = $FD
OUTL = $FE
OUTH = $FF
ZERO = $80
GREEN0 = $80
GREEN1 = $81
GREEN2 = $82
GREEN3 = $83
GREEN4 = $84
ZERO = $85
; Soft Switches
KEYPRESS= $C000
@ -80,6 +85,15 @@ start_sprites:
sta LEVEL_DONE
sta FIRE_X
lda #$44
sta GREEN0
sta GREEN4
lda #$cc
sta GREEN1
sta GREEN3
lda #$ff
sta GREEN2
lda #64
sta YPOS
@ -211,10 +225,11 @@ display_loop:
; 829 -- erase ship (100*8)+(14*2)+1
; -31 -- move ship
; -17 -- move fire
; -306 -- draw fire (61*5)+1
; -61 -- keypress
; -8 -- loop
;=======
; 1783
; 1477
;================
; erase old ship
@ -328,7 +343,6 @@ done_move:
;==========================
; draw the ship
; at Y=64 for now
ldy YPOS ; 3
@ -431,6 +445,48 @@ done_move:
;==========================
; draw the fire
ldy FIRE_Y ; 3
; line 0
ldx #0 ; 2
jsr fire_line ; 6+51
;====
; 59
; line 1
iny ; 2
ldx #1 ; 2
jsr fire_line ; 6+51
;====
; 61
; line 2
iny ; 2
ldx #2 ; 2
jsr fire_line ; 6+51
;====
; 61
; line 3
iny ; 2
ldx #3 ; 2
jsr fire_line ; 6+51
;====
; 61
; line 4
iny ; 2
ldx #4 ; 2
jsr fire_line ; 6+51
;====
; 61
pad_time:
@ -438,24 +494,25 @@ pad_time:
; WAIT for VBLANK to finish
;============================
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
; nop
; nop
; nop
; nop
; nop
; nop
; nop
; nop
; nop
; nop
wait_loop:
; Try X=6 Y=41 cycles=1477
; Try X=175 Y=2 cycles=1763 R20
ldy #2 ; 2
loop1: ldx #175 ; 2
ldy #41 ; 2
loop1: ldx #6 ; 2
loop2: dex ; 2
bne loop2 ; 2nt/3
dey ; 2
@ -703,6 +760,43 @@ erase_line:
rts ; 6
;========================
; Draw a line of a fire
;========================
; Y = y value
; x = location in sprite
; 17+11+14+9 = 51
fire_line:
sty TEMPY ; 3
lda y_lookup_l,Y ; 4
sta OUTL ; 3
lda y_lookup_h,Y ; 4
sta OUTH ; 3
;=======
; 17
; 38/40
; XPOS
lda FIRE_X ; 3
ldy #37 ; 2
sta (OUTL),Y ; 6
;=======
; 11
; COL0
ldy #39 ; 2
txa ; 2
ora #$80 ; 2
tax ; 2
sta (OUTL),Y ; 6
;=======
; 14
ldy TEMPY ; 3
rts ; 6
;=======
; 9
.include "gr_simple_clear.s"