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clock2_screen.s
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321 lines (246 loc) · 6.23 KB
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#-------------------------------------------------------------------------------
# MUSIC RELEASE 'timeCS' ('CLOCK SCREEN 2') 6-channel (2AY) music only!
# BY VLADIMIR 'KUVO' KUTYAKOV/CSI
#
# CONVERSION FOR Elektronika MS0511 (UKNC)
# BY ABERRANTHACKER
#
# SOUND DEVICE: Aberrant Sound Module
# PLATFORM: Elektronika MS0511
# COMPILER: GNU Assembler
#-------------------------------------------------------------------------------
.nolist
.include "hwdefs.s"
.include "macros.s"
.include "defs.s"
.include "clock_defs.s"
.global start
.org ClockScreenStart
start:
START_CLOCK:
.equiv first_run_flag, .+2
TST $0
BNZ 2$
INC first_run_flag
.ppudo_ensure $PPU.SetPalette, $mainscr_palette
MOV $FB0, R0
MOV $CLOCK_GFX, R1
MOV $CLOCK_SCR_HEIGHT, R2
10$:
MOV $CLOCK_SCR_WIDTH_WORDS, R3
1$:
MOV (R1)+, (R0)+
SOB R3, 1$
ADD $LINE_WIDTHB - CLOCK_SCR_WIDTH_BYTES, R0
SOB R2, 10$
2$:
CALL NEXT_CLOCK_OPER
RETURN
NEXT_CLOCK_OPER:
# WAIT
COM $0
BNE 1$
MOV $1, R0
XOR R0, ADDER_Y2
.equiv RIGHT_RAY_IDX, .+2
1$: MOV $RIGHT_RAY - 4, R5
.equiv LEFT_RAY_IDX, .+2
MOV $LEFT_RAY, R4
DEC $0
BPL DISPLAY_RAYS
MOV $017, .-4
ADD $4, R5
CMP R5, $RIGHT_RAY + (4 * 11)
BLO 2$
MOV $RIGHT_RAY, R5
ADD $4, R4
CMP R4, $LEFT_RAY + (4 * 12)
BLO 2$
MOV $LEFT_RAY, R4
2$: MOV R5, RIGHT_RAY_IDX
MOV R4, LEFT_RAY_IDX
DISPLAY_RAYS:
PUSH R4
CALL DISPLAY_RAY
POP R5
DISPLAY_RAY:
MOVB (R5)+, R0
BIC $0177400, R0
MOVB (R5)+, R1
BIC $0177400, R1
MOVB (R5)+, R2
BIC $0177400, R2
MOVB (R5)+, R3
.equiv ADDER_Y2, .+2
ADD $0, R3
BIC $0177400, R3
MOV (PC)+, R4 # 'NOP' IN R4
NOP
SUB R0, R2
BEQ 1$
BMI 10$
MOV (PC)+, R4 # 'INC R0' IN R4
INC R0
BR 1$
10$:NEG R2
MOV (PC)+, R4 # 'DEC R0' IN R4
DEC R0
1$: MOV R4, CODE_MODIFY_INCR_X
MOV (PC)+, R4 # 'NOP' IN R4
NOP
SUB R1, R3
BEQ 3$
BMI 2$
MOV (PC)+, R4 # 'INC R1' IN R4
INC R1
BR 3$
2$: NEG R3
MOV (PC)+, R4 # 'DEC R1' IN R4
DEC R1
3$: MOV R4, CODE_MODIFY_INCR_Y
CLR FACTOR_X
CLR FACTOR_Y
CLR FACTOR_X_ALIGN
CLR FACTOR_Y_ALIGN
MOV R2, DOTS_COUNT
CMP R2, R3
BNE 4$
CLR R2
CLR R3
BR LINE_DRAW
4$: BLO 5$
# R3 * 256 / R2 * 256
MOV R2,R4
CLR R2
SWAB R3
DIV R4,R2
SWAB R2
MOV R2, FACTOR_Y_ALIGN
MOV R2, FACTOR_Y_FINE
MOV FACTOR_Y, R3
CLR R2
BR LINE_DRAW
5$: MOV R3, DOTS_COUNT
# R2 * 256 / R3 * 256
MOV R2,R5
CLR R4
SWAB R5
DIV R3,R4
SWAB R4
MOV R4, FACTOR_X_ALIGN
MOV R4, FACTOR_X_FINE
MOV FACTOR_X, R2
CLR R3
LINE_DRAW:
COM $0
BNE LINE_DRAW
SUB $4, DOTS_COUNT
OFFSET_X:
DEC R2
BPL OFFSET_Y
.equiv FACTOR_X_ALIGN, .+2
MOV $0, R4
BEQ FACTOR_X_INIT
.equiv FACTOR_X_FINE, .+2
ADD R4, $0
BCC OFFSET_Y
FACTOR_X_INIT:
.equiv FACTOR_X, .+2
MOV $0, R2
CODE_MODIFY_INCR_X:
NOP # or 'INC R0' or 'DEC R0'
OFFSET_Y:
DEC R3
BPL CALC_SCREEN_ADDR
.equiv FACTOR_Y_ALIGN, .+2
MOV $0, R4
BEQ FACTOR_Y_INIT
.equiv FACTOR_Y_FINE, .+2
ADD R4, $0
BCC CALC_SCREEN_ADDR
FACTOR_Y_INIT:
.equiv FACTOR_Y, .+2
MOV $0, R3
CODE_MODIFY_INCR_Y:
NOP # or 'INC R1' or 'DEC R1'
CALC_SCREEN_ADDR: # R0: X, R1: Y
MOV R1, R5
MUL $288,R5 #SWAB R4 # X400
ADD R0, R5 #BIS R0, R4
CLC
ROR R5 # X200
ASR R5 # X100
ADD $FB0, R5
CALC_DOT_ADDR:
MOV R0, R4
BIC $0177770, R4
ASL R4
DISPLAY_DOT:
MOV DOTS(R4), R4
XOR R4, (R5)
DEC (PC)+
DOTS_COUNT: .word 0
BNE OFFSET_X
LINE_END:
RETURN
DOTS:
#7654321076543210 7 6 5 4 3 2 1 0
.word 0b0000000100000000 # 0b00_00_00_00_00_00_00_10
.word 0b0000001000000010 # 0b00_00_00_00_00_00_11_00
.word 0b0000010000000000 # 0b00_00_00_00_00_10_00_00
.word 0b0000100000001000 # 0b00_00_00_00_11_00_00_00
.word 0b0001000000000000 # 0b00_00_00_10_00_00_00_00
.word 0b0010000000100000 # 0b00_00_11_00_00_00_00_00
.word 0b0100000000000000 # 0b00_10_00_00_00_00_00_00
.word 0b1000000010000000 # 0b11_00_00_00_00_00_00_00
LEFT_RAY:
.byte 32, 4 + (16 * 0)
.byte 74 + 010, 59
.byte 32, 4 + (16 * 1)
.byte 72 + 010, 62
.byte 32, 4 + (16 * 2)
.byte 68 + 010, 66
.byte 32, 4 + (16 * 3)
.byte 67 + 010, 72
.byte 32, 4 + (16 * 4)
.byte 66 + 010, 79
.byte 32, 4 + (16 * 5)
.byte 63 + 010, 86
.byte 32, 4 + (16 * 6)
.byte 64 + 010, 94
.byte 32, 4 + (16 * 7)
.byte 64 + 010, 102
.byte 32, 4 + (16 * 8)
.byte 67 + 010, 108
.byte 32, 4 + (16 * 9)
.byte 69 + 010, 114
.byte 32, 4 + (16 * 10)
.byte 70 + 010, 119
.byte 32, 4 + (16 * 11)
.byte 73 + 010, 121
RIGHT_RAY:
.byte 160, 12
.byte 115 - 4, 66
.byte 160, 28
.byte 116 - 4, 69
.byte 160, 44
.byte 119 - 4, 72
.byte 160, 61
.byte 121 - 4, 77
.byte 160, 76
.byte 122 - 4, 83
.byte 160, 92
.byte 122 - 4, 90
.byte 160, 108
.byte 122 - 4, 96
.byte 160, 124
.byte 121 - 4, 102
.byte 160, 140
.byte 120 - 4, 108
.byte 160, 156
.byte 118 - 4, 111
.byte 160, 172
.byte 116 - 4, 114
CLOCK_GFX:
.incbin "build/clock2/clock2.raw"
.even