/
mbc200vid.asm
3135 lines (2875 loc) · 58.3 KB
/
mbc200vid.asm
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; Sanyo MBC-200 video firmware (2nd Z80 CPU)
; BC is preserved to hold the current text position (C = column, B=fine grained 2 px row position)
ORG $0000
; Routine at 0
;
; Used by the routine at RESTART.
L0000:
DI
LD SP,$4000
LD A,$00
LD ($3FA0),A
LD A,$00
LD ($3FA3),A
LD ($3FA5),A
LD HL,$3000
LD ($3FA1),HL
LD HL,$8000
LD ($3FA6),HL ; Screen start address
LD ($3FA8),HL ; Screen start address for scrolling
LD A,$00
LD ($3FAA),A ; 'inverse' attribute
LD ($3FAB),A ; 'underline' attribute
LD ($3FAC),A ; 'overline' attribute
LD B,14
LD HL,CRTC_TABLE-1
CRTC_LOOP:
INC HL
DEC B
LD A,B
OUT ($B0),A
LD A,(HL)
OUT ($B1),A
JR NZ,CRTC_LOOP
CALL DO_CLS
LD A,$90 ; Control byte (PA=IN, PB=OUT, PC=OUT)
OUT ($73),A ; PPI_1: issue control word
IN A,($72) ; PPI_1 Port C
OR $40
OUT ($72),A
JP L0078
; Routine at 74
;
; Used by the routine at L0000.
DO_CLS:
LD HL,0
ADD HL,SP
EX DE,HL
LD HL,0
LD SP,HL
LD BC,$0800
DO_CLS_0:
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
PUSH HL
DEC BC
LD A,B
OR C
JP NZ,DO_CLS_0
EX DE,HL
LD SP,HL
LD BC,0
RET
; Data block at 106
CRTC_TABLE:
DEFB $00 ; Horizontal Total
DEFB $00 ; Horizontal Displayed
DEFB $00 ; Horizontal Sync Position
DEFB $20 ; Horizontal and Vertical Sync Widths
DEFB $03 ; Vertical Total
DEFB $02 ; Vertical Total Adjust
DEFB $64 ; Vertical Displayed
DEFB $64 ; Vertical Sync position
DEFB $00 ; Interlace and Skew
DEFB $68 ; Maximum Raster Address
DEFB $4B ; Cursor Start Raster
DEFB $51 ; Cursor End Raster
DEFB $50 ; Display Start Address (High)
DEFB $65 ; Display Start Address (Low)
; Routine at 120
;
; Used by the routine at L0000.
L0078:
LD HL,L0078 ; Loop on myself
PUSH HL
CALL L0586
CALL GET_BYTE
CP $20
JR C,CONTROL_CODES
JP CONSOLE_OUT
; Routine at 137
;
; Used by the routine at L0078.
CONTROL_CODES:
LD HL,CTL_TABLE-2
; This entry point is used by the routine at IN_ESC.
CONTROL_CODES_0:
PUSH BC
LD C,A
CONTROL_CODES_1:
INC HL
INC HL
LD A,(HL)
INC HL
OR A
JR Z,CONTROL_CODES_2
CP C
JR NZ,CONTROL_CODES_1
POP BC
LD E,(HL)
INC HL
LD D,(HL)
EX DE,HL
JP (HL)
CONTROL_CODES_2:
POP BC
RET
; Routine at 160
IN_ESC:
CALL GET_BYTE
LD HL,ESC_TABLE-2
JR CONTROL_CODES_0
; Data block at 168
CTL_TABLE:
DEFB $07
DEFW BEEP
DEFB $08
DEFW DO_BS
DEFB $09
DEFW DO_TAB
DEFB $0A
DEFW DO_LF
DEFB $0D
DEFW DO_CR
DEFB $1A
DEFW DO_CLS
DEFB $1B
DEFW IN_ESC
DEFB $00
; Message at 190
ESC_TABLE:
DEFM "Q"
DEFW L03A0
DEFM "K"
DEFW L013D
DEFM "A"
DEFW LINES_40
DEFM "F"
DEFW L016F
DEFM "C"
DEFW L01C1
DEFM "="
DEFW SET_CURSOR
DEFM "S"
DEFW SET_PIXEL
DEFM "R"
DEFW RESET_PIXEL
DEFM "T"
DEFW CLEAR_EOL
DEFM "I"
DEFW INSERT_LINE
DEFM "B"
DEFW DELETE_LINE
DEFM "L"
DEFW LD_CUSTOM
DEFM "J"
DEFW JP_CUSTOM
DEFM "G"
DEFW L03C5
DEFM "M"
DEFW LINES_33
DEFM "D"
DEFW DISABLE
DEFM "E"
DEFW ENABLE
DEFM "P"
DEFW PLOT
DEFM "H"
DEFW HARDCOPY
DEFM "N"
DEFW NEGATIVE
DEFM "?"
DEFW RESTART
DEFM "t"
DEFW ATTR
DEFB $00
; Routine at 257
ATTR:
CALL GET_BYTE
PUSH AF
AND $04
JP NZ,SET_INVERSE
LD A,$00
LD ($3FAA),A
; This entry point is used by the routine at SET_INVERSE.
ATTR_0:
POP AF
PUSH AF
AND $02
JP NZ,SET_UNDERLINE
LD A,$00
LD ($3FAB),A
; This entry point is used by the routine at SET_UNDERLINE.
ATTR_OVERLINE:
POP AF
AND $08
JP NZ,SET_OVERLINE
LD A,$00
LD ($3FAC),A
RET
; Routine at 295
;
; Used by the routine at ATTR.
SET_INVERSE:
LD A,$01
LD ($3FAA),A
JP ATTR_0
; Routine at 303
;
; Used by the routine at ATTR.
SET_UNDERLINE:
LD A,$01
LD ($3FAB),A
JP ATTR_OVERLINE
; Routine at 311
;
; Used by the routine at ATTR.
SET_OVERLINE:
LD A,$01
LD ($3FAC),A
RET
; ESC 'K'
; Routine at 317
L013D:
LD A,$80
LD ($3FA0),A
LD L,$0A
JP SET_LINES_0
; ESC 'A'
; Routine at 327
LINES_40:
LD A,($3FA0)
LD H,A
LD A,$01
LD ($3FA0),A
LD L,$05
CALL SET_LINES_0
LD A,H
OR A
RET Z
RET P
LD A,B
ADD A,L
LD B,A
RET
; ESC 'M'
; Routine at 349
LINES_33:
LD A,$00
LD ($3FA0),A
LD L,$06
; This entry point is used by the routines at L013D and LINES_40.
SET_LINES_0:
XOR A
SUB L
SET_LINES_1:
ADD A,L
CP B
JR C,SET_LINES_1
JR Z,SET_LINES_2
SUB L
SET_LINES_2:
LD B,A
RET
; ESC 'F'
; Routine at 367
L016F:
PUSH BC
CALL GET_BYTE
CP $FC
JR NC,L016F_2
LD H,$00
LD L,A
CALL MULT_X32
LD DE,$2000
ADD HL,DE
LD A,$04
L016F_0:
PUSH AF
PUSH HL
LD DE,$0004
ADD HL,DE
EX DE,HL
POP HL
LD A,$08
L016F_1:
PUSH AF
CALL GET_BYTE
LD (HL),A
INC HL
EX DE,HL
POP AF
DEC A
JR NZ,L016F_1
EX DE,HL
POP AF
DEC A
JR NZ,L016F_0
L016F_2:
POP BC
RET
; ESC 'L'
; Load custom code at $2000
; Routine at 415
LD_CUSTOM:
PUSH BC
CALL GET_BYTE
LD H,A
CALL GET_BYTE
LD L,A
EX DE,HL
LD HL,$0F7F
XOR A
SBC HL,DE
EX DE,HL
JR C,LD_CUSTOM_1
LD DE,$2000
LD_CUSTOM_0:
CALL GET_BYTE
LD (DE),A
INC DE
DEC HL
LD A,H
OR L
JR NZ,LD_CUSTOM_0
LD_CUSTOM_1:
POP BC
RET
; ESC 'C'
; Routine at 449
L01C1:
PUSH BC
LD BC,0
CALL VADDR_BC
EX DE,HL
LD B,50
IN A,($70) ; PPI_1 Port A
AND $03 ; 00000011
XOR $03
LD ($3FA4),A
JR Z,L01DC
CP $01
JR Z,L01E7
POP BC
RET
; Routine at 476
;
; Used by the routine at L01C1.
L01DC:
LD IX,L02DE
LD C,$01
CALL L01F2
POP BC
RET
; Routine at 487
;
; Used by the routine at L01C1.
L01E7:
LD IX,L02EB
LD C,$02
CALL L01F2
POP BC
RET
; Routine at 498
;
; Used by the routines at L01DC and L01E7.
L01F2:
PUSH HL
PUSH BC
CALL L0240
LD D,80
L01F2_0:
PUSH DE
CALL L02C7
CALL L021D
CALL L0256
LD DE,$0004
CALL L02D8
POP DE
DEC D
JR NZ,L01F2_0
LD A,$0A
CALL L098D
POP BC
POP HL
LD DE,$0280
CALL L02D8
DJNZ L01F2
RET
; Routine at 541
;
; Used by the routine at L01F2.
L021D:
PUSH HL
PUSH BC
LD IY,$3F80
CALL L027C
LD D,$08
LD A,($3FA4)
OR A
JR NZ,L0233
CALL L027C_0
JR L0233_0
; Routine at 563
;
; Used by the routine at L021D.
L0233:
PUSH BC
LD BC,$0008
ADD IY,BC
POP BC
CALL L027C
; This entry point is used by the routine at L021D.
L0233_0:
POP BC
POP HL
RET
; Routine at 576
;
; Used by the routine at L01F2.
L0240:
PUSH BC
PUSH IX
LD B,(IX+$00)
INC IX
L0240_0:
LD A,(IX+$00)
CALL L098D
INC IX
DJNZ L0240_0
POP IX
POP BC
RET
; Routine at 598
;
; Used by the routine at L01F2.
L0256:
PUSH HL
PUSH BC
LD B,$08
LD HL,$3F80
LD DE,$0008
L0256_0:
PUSH BC
PUSH HL
L0256_1:
LD A,(HL)
CALL L098D
ADD HL,DE
DEC C
JR NZ,L0256_1
LD A,($3FA4)
OR A
JR Z,L0256_2
XOR A
CALL L098D
L0256_2:
POP HL
INC HL
POP BC
DJNZ L0256_0
POP BC
POP HL
RET
; Routine at 636
;
; Used by the routines at L021D and L0233.
L027C:
LD D,$80
; This entry point is used by the routine at L021D.
L027C_0:
PUSH IY
PUSH BC
PUSH HL
LD E,$04
L027C_1:
PUSH IY
LD C,(HL)
LD B,$08
L027C_2:
LD A,C
RLCA
LD C,A
JR NC,L027C_3
LD A,D
OR (IY+$00)
LD (IY+$00),A
LD A,($3FA4)
OR A
JR Z,L027C_3
LD A,D
RRCA
OR (IY+$00)
LD (IY+$00),A
L027C_3:
INC IY
DJNZ L027C_2
POP IY
INC HL
CALL L02D8_0
LD A,D
RRCA
LD D,A
LD A,($3FA4)
OR A
JR Z,L027C_4
LD A,D
RRCA
LD D,A
L027C_4:
DEC E
JR NZ,L027C_1
POP HL
LD DE,80*4
CALL L02D8
POP BC
POP IY
RET
; Routine at 711
;
; Used by the routine at L01F2.
L02C7:
PUSH BC
LD IY,$3F80
XOR A
LD B,$20
L02C7_0:
LD (IY+$00),A
INC IY
DJNZ L02C7_0
POP BC
RET
; Routine at 728
;
; Used by the routines at L01F2 and L027C.
L02D8:
ADD HL,DE
; This entry point is used by the routine at L027C.
L02D8_0:
LD A,H
OR $80
LD H,A
RET
; Routine at 734
L02DE:
DEFB 12
DEFB 0x1b,0x47,0x1b,0x25,0x39,0x0e,0x1b,0x25,0x32,0x02,0x80
L02EB:
DEFB 8
DEFB 0x0d,0x1b,0x41,0x10,0x1b,0x4b,0x80,0x02
; ESC 'S'
SET_PIXEL:
PUSH BC
CALL GET_2WORDS
CALL PIXEL_ON
POP BC
RET
; Routine at 765
;
; Used by the routines at L02DE and L04AC.
PIXEL_ON:
CALL PIXEL_ADDR
RET C
OR (HL)
LD (HL),A
RET
; ESC 'R' - Reset Pixel
; Routine at 772
RESET_PIXEL:
PUSH BC
CALL GET_2WORDS
CALL PIXEL_OFF
POP BC
; This entry point is used by the routine at L02DE.
RESET_PIXEL_0:
RET
; Routine at 781
;
; Used by the routines at RESET_PIXEL and L04AC.
PIXEL_OFF:
CALL PIXEL_ADDR
RET C
CPL
AND (HL)
LD (HL),A
RET
; Routine at 789
;
; Used by the routines at L02DE and RESET_PIXEL.
GET_2WORDS:
CALL GET_BYTE
LD D,A
CALL GET_BYTE
LD E,A
PUSH DE
CALL GET_BYTE
LD D,A
CALL GET_BYTE
LD E,A
PUSH DE
POP BC
POP DE
RET
; ESC '='
; Set cursor position
; BC holds the current text position (C = column, B=fine grained 2 px row position)
; Routine at 810
SET_CURSOR:
PUSH BC
CALL GET_BYTE
SUB 32
JR C,POPRET
LD D,A
CALL GET_BYTE
SUB 32
JR C,POPRET
LD C,A
LD B,D
CP 80 ; the column range is always 80
JR NC,POPRET
CALL CK_LINEMODE ; get the current text mode
JR Z,L0356 ; 33 rows, multiply by (400/33/2)
JP P,L035E ; 40 rows, multiply by (400/40/2)
LD A,B
CP 20 ;
JR NC,POPRET
LD A,B
ADD A,A ; Multiply by 10
; This entry point is used by the routine at L0356.
SET_CURSOR_0:
ADD A,A
ADD A,A
ADD A,B
ADD A,B
; This entry point is used by the routine at L035E.
SET_CURSOR_1:
LD B,A
POP AF
RET
; Routine at 854
;
; Used by the routine at SET_CURSOR.
L0356:
LD A,B
CP 33
JR NC,POPRET
LD A,B
JR SET_CURSOR_0 ; Multiply by 6
; Routine at 862
;
; Used by the routine at SET_CURSOR.
L035E:
LD A,B
CP 40
JR NC,POPRET
LD A,B
ADD A,A ; Multiply by 5
ADD A,A
ADD A,B
JR SET_CURSOR_1
; Routine at 873
;
; Used by the routines at SET_CURSOR, L0356 and L035E.
POPRET:
POP BC
RET
; ESC 'T'
; clear text up to end of the current line
; Routine at 875
CLEAR_EOL:
PUSH BC
CALL CK_LINEMODE
JR Z,CLEAR_EOL_33
JP P,CLEAR_EOL_40
LD H,$0A
JR CLEAR_EOL_SUB
; Routine at 888
;
; Used by the routine at CLEAR_EOL.
CLEAR_EOL_33:
LD H,$06
JR CLEAR_EOL_SUB
; Routine at 892
;
; Used by the routine at CLEAR_EOL.
CLEAR_EOL_40:
LD H,$05
; This entry point is used by the routines at CLEAR_EOL, CLEAR_EOL_33 and L06B2.
CLEAR_EOL_SUB:
CALL L0383
POP BC
RET
; Routine at 899
;
; Used by the routines at CLEAR_EOL_40 and L05D7.
L0383:
PUSH BC
L0383_0:
CALL VADDR_BC
XOR A
LD (DE),A
INC DE
LD (DE),A
INC C
LD A,C
CP 80
JR C,L0383_0
POP BC
INC B
DEC H
JR NZ,L0383
RET
; ESC 'J'
; Jump to custom code at $2000
; Routine at 919
JP_CUSTOM:
CALL GET_BYTE
CP 'P' ; ESC "JP" ?
RET NZ
JP $2000
; ESC 'Q'
; Routine at 928
L03A0:
LD D,$00
CALL CK_LINEMODE
JR Z,L03AE
JP P,L03B2
LD E,$0A
JR L03B2_0
; Routine at 942
;
; Used by the routine at L03A0.
L03AE:
LD E,$06
JR L03B2_0
; Routine at 946
;
; Used by the routine at L03A0.
L03B2:
LD E,$05
; This entry point is used by the routines at L03A0 and L03AE.
L03B2_0:
LD A,B
OR A
L03B2_1:
JR Z,L03B2_2
INC D
SUB E
JR NC,L03B2_1
L03B2_2:
LD A,D
CALL SEND_BYTE
LD A,C
CALL SEND_BYTE
RET
; ESC 'G'
; Routine at 965
L03C5:
CALL GET_BYTE
CP $FC
RET NC
PUSH BC
PUSH AF
LD A,($3FA0)
CP $80 ; Are we in 'K' mode ?
JR NZ,L03E2 ; No, exit
POP AF
LD H,$00
LD L,A
CALL MULT_X32
LD DE,$2000
ADD HL,DE
JP PUT_CHR_DBL
; Routine at 994
;
; Used by the routine at L03C5.
L03E2:
POP AF
POP BC
RET
; Routine at 997
DISABLE:
LD A,$00
; This entry point is used by the routine at ENABLE.
DISABLE_0:
LD ($3FA5),A
RET
; Routine at 1003
ENABLE:
LD A,$FF
JR DISABLE_0
; Routine at 1007
PLOT:
CALL GET_BYTE
SUB $30
CP $01
JR Z,PLOT_0
CP $00
RET NZ
PLOT_0:
LD ($3F93),A
PUSH BC
LD HL,$3F81
LD E,$04
PLOT_1:
CALL GET_BYTE
LD (HL),A
CALL GET_BYTE
DEC HL
LD (HL),A
INC HL
INC HL
INC HL
DEC E
JR NZ,PLOT_1
LD DE,($3F80)
LD HL,($3F84)
CALL L049E
LD ($3F88),HL
LD ($3F8E),DE
LD DE,($3F82)
LD HL,($3F86)
CALL L049E
LD ($3F8A),HL
LD ($3F90),DE
LD DE,($3F88)
LD HL,($3F8A)
XOR A
SBC HL,DE
JR C,PLOT_2
CPL
PLOT_2:
LD ($3F92),A
CALL L04AC
LD HL,0
; This entry point is used by the routine at PLOT_5.
PLOT_3:
LD ($3F8C),HL
LD HL,($3F86)
LD DE,($3F82)
XOR A
SBC HL,DE
JR NZ,PLOT_4
LD HL,($3F84)
LD DE,($3F80)
XOR A
SBC HL,DE
JP Z,PLOT_6
PLOT_4: