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screen_routines.z80
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ORG &E000
DUMP 15,&2000
FONTPAGE: EQU 9
YS: EQU 24
VIDEO: EQU &8C00
DB 0,0,0 ; 0
PRUT: JP CHAR
JP KURZOR ; 6
JP SROLUP
JP SROLDO ; c
JP CLS
JP SETS ; 12
JP KURZOR0
JP INDEX1 ; 18
A1: DW 0
A2: NOP
A3: NOP
DW BITMAP
FLAG: DB 0,0,12
CX: DW 0
CY: DB YS
DS 3
LEFTM: DW 16
CHAR: PUSH IY
LD IY,FLAG
EXX
PUSH AF
CP " "
JP C,RKOD
JR NZ,I90
SET 7,(IY+0)
I90: CP &9F ; TABULATOR
JP Z,TAB7
JP NC,SEMI
CP 128
CALL NC,TODT
LD H,0
LD L,A
ADD HL,HL
ADD HL,HL
LD D,H
LD E,L
ADD HL,HL
ADD HL,DE
ADD HL,HL
LD DE,BITMAP+126-768
ADD HL,DE
CALL INDEX
COMO: PUSH AF
LD DE,(CX)
ADD E
JR NC,OK
JR Z,OK
INC D
DEC D
JR Z,OK
EXIT: POP AF
JP NOCR ; NEBUDE SA TLACIT
OK: LD A,D
SUB 2
JR Z,EXIT
RR D
RR E
LD A,(CY)
LD D,A
SCF
RR D
RR E
LD (IY+2),12
NEXTL: XOR A
LD B,(HL)
OR (HL)
INC HL
LD C,(HL)
OR (HL)
INC HL
EX AF,AF'
XOR A
EX AF,AF'
JR Z,NOROTATE-1
LD A,(CX)
BIT 1,(IY+0)
JR Z,$+7
AND 2
RRCA
JR ROTA-2
AND 3
JR Z,NOROTATE
ROTA: EX AF,AF'
RR B
RR C
RRA
RR B
RR C
RRA
EX AF,AF'
DEC A
JR NZ,ROTA
LD A,(DE)
NOROTATE: EX DE,HL
LD (HL),A
BIT 0,(IY+0)
CALL NZ,SIR
BIT 1,(IY+0)
JP NZ,DOUB
LD A,(HL)
OR B
LD (HL),A
INC HL
LD (HL),C
INC HL
EX AF,AF'
LD (HL),A
LD BC,128-2
ADL: ADD HL,BC
EX DE,HL
DEC (IY+2)
JR NZ,NEXTL
LD C,(IY+0)
BIT 7,C
RES 7,C
LD (IY+0),C
JR NZ,NOUNDER
BIT 2,C
JR Z,NOUNDER
POP AF
PUSH AF
ADD 3
RRCA
RRCA
AND 7
LD B,A
LD A,255
DEC D
LD (DE),A
INC E
DJNZ $-2
NOUNDER: POP AF
ADDPOZ: LD HL,(CX)
ADD L
LD L,A
JR NC,$+3
INC H
LD (CX),HL
JR NOCR
CR: LD HL,(LEFTM)
LD (CX),HL
LD A,(CY)
ADD 12
CP &C0
JR NC,NOCR
LD (CY),A
NOCR: POP AF
EXX
POP IY
RET
RKOD: CP 13
JR Z,CR
LD HL,NOCR
PUSH HL
CP 16
JR NZ,NOUN
LD A,(FLAG)
XOR %100
LD (FLAG),A
RET
NOUN: CP 14
JR NZ,NOUN0
LD A,(FLAG)
XOR 1
LD (FLAG),A
RET
NOUN0: CP 15
JR NZ,NOUN2
LD A,(FLAG)
XOR 2
LD (FLAG),A
RET
NOUN2: CP 1
JR NZ,NOUN3
LD HL,(LEFTM)
LD A,YS
LD (CX),HL
LD (CY),A
CALL CLS
RET
NOUN3: CP 17
JR C,NOUN4
SUB 17
CP (IY+1)
RET Z
VY: LD (IY+1),A
LD C,FONTPAGE+32
CP 10
JR C,DOLNE
SUB 10
DEC C
DOLNE: LD HL,0
LD DE,3150
PRI: AND A
JR Z,PFO
ADD HL,DE
DEC A
JR PRI
PFO: IN A,(250)
DI
EX AF,AF'
LD A,C
OUT (250),A
LD DE,BITMAP
LD BC,3150
LDIR
EX AF,AF'
OUT (250),A
EI
RET
NOUN4: CP 159
JR NZ,NOUN5
TAB7: LD A,4
ADD A
ADD A
ADD A
PUSH AF
LD BC,(CX)
LD B,A
DEC B ;!!!!!!!!!!
LD A,C
AND 3
LD C,A
LD HL,(CX)
AND A
RR H
RR L
LD A,(CY)
LD H,A
SCF
RR H
RR L
CALL MICRO
JP ADDPOZ-1
NOUN5: CP 3
RET NZ
LD HL,ATS
LD (PRUT+1),HL
RET
ATS: LD HL,CHAR
LD (PRUT+1),HL
INC A
INC A
AND 15
ADD A
ADD A
LD E,A
ADD A
ADD E
LD (CY),A
LD HL,(LEFTM)
LD (CX),HL
RET
SIR: LD (IY+6),B
LD (IY+7),C
EX AF,AF'
LD (IY+8),A
RR B
RR C
RRA
RR B
RR C
RRA
EX AF,AF'
LD A,(IY+6)
OR B
LD B,A
LD A,(IY+7)
OR C
LD C,A
EX AF,AF'
OR (IY+8)
EX AF,AF'
RET
SROLUP: PUSH AF
LD DE,VIDEO
LD HL,VIDEO+&600
LD BC,&6000-&1800
CALL MULTI.LDIR
EX DE,HL
LD BC,&5FF
LD D,H
LD E,L
INC DE
LD (HL),L
CALL MULTI.LDIR+2
POP AF
RET
SROLDO: PUSH AF
LD DE,&DFFF-&600
LD HL,&DFFF-&C00
LD BC,&6000-&1800
CALL MULTI.LDDR
EX DE,HL
LD BC,&5FF
LD D,H
LD E,L
DEC DE
LD (HL),0
CALL MULTI.LDDR+2
POP AF
RET
INDEX: PUSH HL
LD HL,BITMAP-32
ADD L
LD L,A
JR NC,$+3
INC H
LD A,(HL)
LD HL,ALTER
ADD (HL)
POP HL
BIT 3,(IY+0)
JR Z,URC
DB 62
ALTER: DB 8
URC: BIT 0,(IY+0) ; BOLD
JR Z,$+3
INC A
BIT 1,(IY+0) ; DOUBLE SIZE
RET Z
ADD A
RET
INDEX1: PUSH IY
LD IY,FLAG
CP 128
JR C,NUL
CP &8F
JR Z,HARDSPC
CP &9F
JR Z,TABSS
JR C,ZDIA
LD A,8
CALL URC
JR NUL+3
ZDIA: PUSH HL
PUSH DE
CALL TODT
POP DE
POP HL
NUL: CALL INDEX
POP IY
RET
HARDSPC: LD A," "
JR NUL
TABSS: LD A,(TAB7+1) ; vypocet ind pre TAB
ADD A
ADD A
ADD A
JR NUL+3
CLS: LD HL,VIDEO
LD DE,VIDEO+1
LD BC,&6000-&C01-&600
LD (HL),L
JP MULTI.LDIR+2
TODT:
LD E,A
LD D,0
LD HL,TABDT-128
ADD HL,DE
LD A,(HL)
RET
DOUB: LD A,(HL)
CALL DOU0+1
LD B,C
CALL DOU0
EX AF,AF'
LD B,A
CALL DOU0
LD BC,128-6
JP ADL
DOU0: XOR A
BIT 6,B
JR Z,$+4
OR 240
BIT 4,B
JR Z,$+4
OR 15
LD (HL),A
INC HL
XOR A
BIT 2,B
JR Z,$+4
OR 240
BIT 0,B
JR Z,$+4
OR 15
LD (HL),A
INC HL
RET
TABDT: DB 143,135,147,129,131,145,149,151
DB 137,133,153,157,155,141,139," "
DB 142,134,146,128,130,144,148,150
DB 136,132,152,156,154,140,138," "
KURZOR0: PUSH AF
PUSH HL
LD HL,(CX)
LD A,(CY)
LD (A1),HL
LD (A2),A
LD A,L
LD (A3),A
POP HL
POP AF
RET
KURZOR: EX AF,AF'
EXX
LD HL,(A1)
RR H
RR L
LD A,(A2)
LD H,A
SCF
RR H
RR L
LD B,12
LD A,(A3)
SDF: AND 3
LD C,%11110000
JR Z,NRO
RF: LD C,%1111
DEC A
JR Z,NRO
INC HL
DEC A
JR SDF
NRO:
LD DE,128
KS: LD A,(HL)
XOR C
LD (HL),A
ADD HL,DE
DJNZ KS
EXX
EX AF,AF'
RET
SETS:
LD A,(IX+0)
AND 31
CALL CHAR
LD A,(IX+0)
RRCA
RRCA
RRCA
RRCA
RRCA
AND %111
LD (FLAG),A
LD A,(IX+1)
LD (TAB7+1),A
LD A,(IX+2)
AND 8
LD HL,FLAG
RES 3,(HL)
OR (HL)
LD (HL),A
LD A,(IX+2)
RRCA
RRCA
RRCA
RRCA
AND 15
LD (ALTER),A
LD L,(IX+3)
LD H,(IX+4)
LD (LEFTM),HL
LD (CX),HL
RET
MICRO: LD E,4
INC C
XOR A
YY: DEC C
JR Z,XX
LD A,255
OR 128
RRCA
OR 128
JR YY
XX: PUSH AF
LD A,B
SUB E
LD B,A
POP AF
LO: CALL M12
INC HL
LD A,B
SUB 4
JR C,POSL
LD B,A
XOR A
JR LO
POSL: XOR A
INC B
DEC B
RET Z
CD: SRL A
SRL A
DJNZ CD
CPL
M12: PUSH HL
BIT 7,L
JR NZ,NEPS
PUSH BC
LD B,12
LD C,A
DX: LD A,(HL)
AND C
LD (HL),A
LD A,128
ADD L
LD L,A
JR NC,$+3
INC H
DJNZ DX
POP BC
NEPS: POP HL
RET
SEMI: SUB &A0
LD H,0
LD L,A
ADD HL,HL
ADD HL,HL
LD D,H
LD E,L
ADD HL,HL
ADD HL,DE
ADD HL,HL
LD DE,BITMAP+3150
ADD HL,DE
LD A,8
CALL URC
JP COMO
PROPO.LDIR: PUSH HL
LD HL,MULTI.LDIR
JR MULTI
PROPO.LDDR: PUSH HL
LD HL,MULTI.LDDR
MULTI: LD A,C
NEG
SLA A
ADD L
LD L,A
JR NC,$+3
INC H
EX (SP),HL
RET
MULTI.LDIR:
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
LDI
JP PE,MULTI.LDIR
RET
MULTI.LDDR:
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
LDD
JP PE,MULTI.LDDR
RET
BITMAP: MDAT "COBRA"
MDAT "MAT"