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Think #04
30 августа 1997 |
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Assembler - Indicator for AY-8910 (12) - 2 procedures.
ASSEMBLER
If you noticed in the third newspaper in this category, then
you know that speech in it is a variety of useful procedures
that are required when writing musical demonstrations and
INTR'ushek.
Today you can see two more variants display channels for
AY-8910 (12).
; INDICATOR FOR AY-8910 (8912)
, Down 3 thick strips.
; Procedure "taken" from a musical demonstration, the radio
"PRIVET 2"
ORG 50000
LD A, 8
LD BC, # FFFD
OUT (C), A
LD A, 255
IN A, (# FD)
LD HL, 22440
CALL M1
LD A, 9
LD BC, # FFFD
OUT (C), A
LD A, 255
IN A, (# FD)
LD HL, 22447
CALL M1
LD A, 10
LD BC, # FFFD
OUT (C), A
LD A, 255
IN A, (# FD)
LD HL, 22454
CALL M1
RET
M1 LD (RAB1), HL
LD (RAB2), A
LD A, 32
LD (RAB3), A
M2 LD A, 8
LD (RAB4), A
M3 LD A, (RAB2)
CP 0
CALL NZ, M4
CALL Z, M5
LD A, (RAB3)
DEC A
CP 0
RET Z
LD (RAB3), A
LD A, (RAB4)
DEC A
CP 0
JP Z, M6
LD (RAB4), A
LD HL, (RAB1)
LD BC, 256
AND A
SBC HL, BC
LD (RAB1), HL
JP M3
M4 LD HL, (RAB1)
LD B, 255
LD (HL), B
INC HL
LD (HL), B
DEC A
LD (RAB2), A
RET
M5 LD HL, (RAB1)
LD B, 0
LD (HL), B
INC HL
LD (HL), B
RET
M6 LD HL, (RAB1)
LD BC, 1760
AND A
ADC HL, BC
LD (RAB1), HL
JP M2
RET
RAB1 DEFB 0,0
RAB2 DEFB 0
RAB3 DEFB 0
RAB4 DEFB 0
; INDICATOR FOR AY 8910 (8912)
; In the top left corner 3 "stars".
; Procedure contains 7 to 32 sprites buy; that with prayt.
; Procedure "taken" from a musical demonstration, the radio "*
VVV * part 1"
ORG 50000
CALL LF623
CALL LF662
CALL LF691
RET
LF623 LD BC, # FFFD
LD A, 8
OUT (C), A
IN A, (C)
AND 15
RRA
PUSH AF
LD B, A
JR Z, LF639
XOR A
LD L, 1932
LF636 ADD A, L
DJNZ LF636
LF639 LD HL, SPRITE
LD C, A
ADD HL, BC
LD A, 16
LD DE, 16384
LF641 PUSH DE
LD BC, Feb.
LDIR
POP DE
PUSH AF
CALL LF652
POP AF
DEC A
JR NZ, LF641
POP AF
RET
LF652 INC D
LD A, D
AND 7
RET NZ
LD A, E
ADD A, 32
LD E, A
CCF
SBC A, A
AND 248
ADD A, D
LD D, A
RET
LF662 LD BC, # FFFD
LD A, 9
OUT (C), A
IN A, (C)
AND 15
RRA
PUSH AF
LD B, A
JR Z, LF678
XOR A
LD L, 1932
LF675 ADD A, L
DJNZ LF675
LF678 LD HL, SPRITE
LD C, A
ADD HL, BC
LD A, 16
LD DE, 16386
LF680 PUSH DE
LD BC, Feb.
LDIR
POP DE
PUSH AF
CALL LF652
POP AF
DEC A
JR NZ, LF680
POP AF
RET
LF691 LD BC, # FFFD
LD A, 10
OUT (C), A
IN A, (C)
AND 15
RRA
PUSH AF
LD B, A
JR Z, LF6A7
XOR A
LD L, 1932
LF6A4 ADD A, L
DJNZ LF6A4
LF6A7 LD HL, SPRITE
LD C, A
ADD HL, BC
LD A, 16
LD DE, 16388
LF6AF PUSH DE
LD BC, Feb.
LDIR
POP DE
PUSH AF
CALL LF652
POP AF
DEC A
JR NZ, LF6AF
POP AF
RET
SPRITE DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,1,128
DEFB 1,192,0,128,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,128,0,128
DEFB 3,224,0,128,0,128,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,128,0,128,1,192
DEFB 7,240,1,192,0,128,0,128
DEFB 0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0
DEFB 0,128,0,128,1,192,3,224
DEFB 15,248,3,224,1,192,0,128
DEFB 0,128,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,128
DEFB 0,128,0,128,1,192,3,224
DEFB 31,252,3,224,1,192,0,128
DEFB 0,128,0,128,0,0,0,0
DEFB 0,0,0,0,0,0,0,128
DEFB 0,128,1,192,3,224,7,240
DEFB 31,252,7,240,3,224,1,192
DEFB 0,128,0,128,0,0,0,0
>
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