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bios.asm
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INCLUDE "defines.inc"
INCLUDE "quorum_hw.inc"
RESET: EQU 0
CPM_SYSCALL: EQU 5
SCREEN: EQU 0C000h
BANK_SWITCH_0040: EQU 40h
word_4: EQU 0004h
AINTM1: EQU 0038h
AINTM2: EQU 0035h
SPBIOS: EQU 0F000H
BUF_ED: EQU 0BF80H
unk_40: EQU 40h ; call here
unk_BF80: EQU 0BF80h
CCP_INBUFF: EQU 0AA86h
ORG 0DB00H
BOOT: jp _BOOT
WBOOT: jp _WBOOT
CONST: jp _CONST
CONIN: jp _CONIN
CONOUT: jp _CONOUT
SYSTEM: jp _SYSTEM
PUNCH: jp _PUNCH
READER: jp _READER
HOME: jp _HOME
SETDSK: jp _SETDSK
SETTRK: jp _SETTRK
SETSEC: jp _SETSEC
SETDMA: jp _SETDMA
READ: jp _READ
WRITE: jp _WRITE
LISTST: jp _LISTST
SECTRAN: jp _SECTRAN
INT1_HANDLER:
jp loc_DC9A
INT2_HANDLER:
jp loc_DC9F
jp RESET
db 0
word_DB3D: dw 0AA7Dh
db 15h
db 0
db 0
db 5Dh ; ]
db 0
db 0
db 0
db 0
db 0
db 80h ; Ђ
db 0F6h ; ц
db 77h ; w
db 0DBh ; Ы
db 96h ; –
db 0F7h ; ч
db 0
db 0F7h ; ч
db 0
db 0
db 0
db 0
db 0
db 0
db 0
db 0
db 80h ; Ђ
db 0F6h ; ц
db 8Dh ; Ќ
db 0DBh ; Ы
db 0B6h ; ¶
db 0F7h ; ч
db 32h ; 2
db 0F7h ; ч
db 0
db 0
db 0
db 0
db 0
db 0
db 0
db 0
db 80h ; Ђ
db 0F6h ; ц
db 9Ch ; њ
db 0DBh ; Ы
db 0D6h ; Ц
db 0F7h ; ч
db 64h ; d
db 0F7h ; ч
db 1
db 5
db 1
db 3
db 1
db 1
byte_DB76: db 0FFh
db 28h ; (
db 0
db 4
db 0Fh
db 0
db 85h ; …
db 1
db 7Fh ;
db 0
db 0C0h ; А
db 0
db 20h
db 0
db 4
db 0
db 0
db 5
db 1
db 2
db 0
db 2
byte_DB8C: db 0
db 14h
db 0
db 4
db 0Fh
db 1
db 0C3h ; Г
db 0
db 7Fh ;
db 0
db 0C0h ; А
db 0
db 20h
db 0
db 2
db 0
db 80h ; Ђ
db 0
db 3
db 7
db 0
db 0
db 0
db 1Fh
db 0
db 80h ; Ђ
db 0
db 0
db 0
db 0
db 0
word_DBAB: dw 0DB40h
dw 0DB50h
dw 0
_BOOT:
di
ld sp, 80h ; 'Ђ'
xor a
ld (CPM_SYSCALL-1), a
ld de, (word_DB3D)
push de
ld hl, CPM_SYSCALL
call INJECT_JUMP
pop hl
ld de, BDOS_START
call INJECT_JUMP
ld hl, 38h ; '8'
ld de, INT1_HANDLER
call INJECT_JUMP
ld hl, CCP_START
push hl
jr loc_DBE2
_WBOOT:
di
ld sp, 80h ; 'Ђ'
ld hl, CCP_START + 3
push hl
loc_DBE2:
xor a
ld (byte_DB76), a
ld (byte_DB8C), a
ld (byte_E0B0), a
ld (byte_E0AF), a
ld hl, 35h ; '5'
ld (AIM2), hl
ld de, INT2_HANDLER
call INJECT_JUMP
ld hl, 0
ld de, WBOOT
call INJECT_JUMP
ld a, 0C3h
ld hl, DOPINT
cp (hl)
jr z, loc_DC0E
ld (hl), 0C9h
loc_DC0E:
ld a, 0E7h ; 'з'
ld i, a
im 2
ld a, (CCP_INBUFF)
cp 7Fh
call z, sub_DC3A
call sub_DC35
ld a, (CPM_SYSCALL-1)
ld c, a
ret
INJECT_JUMP:
ld (hl), 0C3h
inc hl
ld (hl), e
inc hl
ld (hl), d
ret
sub_DC2B:
ld a, (hl)
inc hl
or a
ret z
ld c, a
call CONOUT
jr sub_DC2B
sub_DC35:
ld hl, unk_DC80
jr loc_DC3D
sub_DC3A:
ld hl, byte_DC61
loc_DC3D:
ld a, (hl)
inc hl
cp 45h
ret z
ld e, (hl)
inc hl
ld d, (hl)
inc hl
cp 52h
jr z, loc_DC55
cp 53h
ret nz
ld c, (hl)
inc hl
ld b, (hl)
inc hl
ldir
jr loc_DC3D
loc_DC55:
ld b, (hl)
inc hl
ld a, (hl)
inc hl
ex de, hl
loc_DC5A:
ld (hl), a
inc hl
djnz loc_DC5A
ex de, hl
jr loc_DC3D
byte_DC61: db 53h
db 8
db 0ABh ; «
db 4
db 0
db 88h ; €
db 0AAh ; Є
db 0
db 0
db 52h ; R
db 0D5h ; Х
db 0B1h ; ±
db 5Bh ; [
db 0
db 53h ; S
db 0D7h ; Ч
db 0B1h ; ±
db 0Bh
db 0
db 24h ; $
db 24h ; $
db 24h ; $
db 20h
db 20h
db 20h
db 20h
db 20h
db 53h ; S
db 55h ; U
db 42h ; B
db 45h ; E
unk_DC80: db 53h
db 7Dh ; }
db 0B5h ; µ
db 3
db 0
db 0
db 2
db 0
db 52h ; R
db 81h ; Ѓ
db 0B5h ; µ
db 49h ; I
db 0
db 52h ; R
db 0BBh ; »
db 0BFh ; ї
db 45h ; E
db 0
db 53h ; S
db 0BFh ; ї
db 0BFh ; ї
db 2
db 0
db 80h ; Ђ
db 0
db 45h ; E
loc_DC9A:
push af
ld a, 1
jr loc_DCA2
loc_DC9F:
push af
ld a, 2
loc_DCA2:
ld (003Dh), a ; wtf
push hl
push de
push bc
ld hl, FRAMES
ld b, 4
loc_DCAD:
inc (hl)
jr nz, loc_DCB3
inc hl
djnz loc_DCAD
loc_DCB3:
call sub_E506
call sub_E103
ld hl, COUNMO
dec (hl)
jr nz, loc_DCC5
xor a
out (PORT_FDD_STATUS), a
ld (MFDCUP), a
loc_DCC5:
call DOPINT
pop bc
pop de
pop hl
pop af
ei
ret
_SETDSK:
ld a, c
cp 3
jr c, loc_DCD8
xor a
ld l, a
ld h, a
inc a
ret
loc_DCD8:
ld hl, word_DBAB
ld (byte_E0B2), a
ld b, 0
add hl, bc
add hl, bc
ld a, (hl)
inc hl
ld h, (hl)
ld l, a
ld a, c
cp 2
ret z
push hl
ld bc, 0Ah
add hl, bc
ld a, (hl)
inc hl
ld h, (hl)
ld l, a
dec hl
ld a, (hl)
dec hl
ld (word_E0BC), hl
inc a
call nz, sub_DE9D
pop hl
ret
_HOME:
ld c, 0
_SETTRK:
ld a, c
ld (word_E0B6), a
ret
_SETSEC:
ld a, c
ld (word_E0B6+1), a
ret
_SECTRAN:
ld h, b
ld l, c
inc hl
ret
_SETDMA:
ld (word_E0B8), bc
ret
_READ:
ld a, (byte_E0B2)
cp 2 ; Is RAM DISK?
jp z, loc_E021
call sub_DF26
call sub_DD55
jr z, loc_DD3B
call sub_DD50
jr nz, loc_DD2E
ld de, BUFD2
jr loc_DD3E
loc_DD2E:
call sub_DD70
call sub_DF86
jr z, loc_DD3B
xor 0
ld (byte_E0C3), a
loc_DD3B:
ld de, BUFD1
loc_DD3E:
ld hl, (word_E0C1)
add hl, de
ld de, (word_E0B8)
ld bc, 80h ; 'Ђ'
ldir
ld a, (byte_E0B1)
or a
ret
sub_DD50:
ld hl, byte_E0C8
jr loc_DD58
sub_DD55:
ld hl, byte_E0C3
loc_DD58:
ld de, byte_E0BE
ld b, 3
loc_DD5D:
ld a, (de)
cp (hl)
ret nz
inc de
inc hl
djnz loc_DD5D
ret
sub_DD65:
ld hl, (word_E0BC)
ld (word_E0C6), hl
ld de, byte_E0C8
jr loc_DD73
sub_DD70:
ld de, byte_E0C3
loc_DD73:
ld hl, byte_E0BE
ld bc, 3
ldir
ret
_WRITE:
ld a, (byte_E0B2)
cp 2
jp z, loc_E027
ld a, c
push af
call sub_DF26
pop af
cp 1
jr nz, loc_DDBF
xor a
ld (byte_E0B0), a
call sub_DD50
jr z, loc_DDA1
call sub_DDA4
ret nz
call sub_DDDC
ret nz
jr sub_DDA4
loc_DDA1:
call sub_DE1B
sub_DDA4:
ld a, (byte_E0AF)
or a
ret z
ld hl, word_E0C6
call loc_DE6B
jr nz, loc_DDB7
ld hl, BUFD2
call sub_DFB8
loc_DDB7:
ld (byte_E0C8), a
ret nz
ld (byte_E0AF), a
ret
loc_DDBF:
or a
jr nz, loc_DE03
call sub_DD50
jr z, sub_DE1B
call sub_DDA4
ret nz
ld a, (byte_E0B0)
or a
jr z, loc_DDD8
call sub_DE3B
jr nz, loc_DDD8
jr loc_DE18
loc_DDD8:
xor a
ld (byte_E0B0), a
sub_DDDC:
call sub_DD65
call sub_DD55
jr nz, loc_DDF1
ld bc, 400h
ld hl, BUFD1
ld de, BUFD2
ldir
jr sub_DE1B
loc_DDF1:
call sub_DE68
ld hl, BUFD2
call loc_DF8C
jr z, sub_DE1B
push af
xor a
ld (byte_E0C8), a
pop af
ret
loc_DE03:
call sub_DDA4
ret nz
ld a, 0FFh
ld (byte_E0B0), a
ld a, (byte_E0B2)
ld (word_E0CB), a
ld hl, (word_E0B6)
ld (word_E0CB+1), hl
loc_DE18:
call sub_DD65
sub_DE1B:
call sub_DD55
jr nz, loc_DE24
xor a
ld (byte_E0C3), a
loc_DE24:
ld de, BUFD2
ld hl, (word_E0C1)
add hl, de
ex de, hl
ld hl, (word_E0B8)
ld bc, 80h ; 'Ђ'
ld a, 0FFh
ld (byte_E0AF), a
ldir
xor a
ret
sub_DE3B:
ld hl, (word_E0CB)
ld a, (byte_E0CD)
ld e, a
ld a, (byte_E0B2)
cp l
ret nz
ld a, (word_E0B6)
sub h
ret c
ld hl, (word_E0BC)
inc hl
inc hl
jr z, loc_DE61
dec a
ret nz
ld a, (word_E0B6+1)
add a, (hl)
loc_DE59:
inc hl
inc hl
inc hl
sub (hl)
cp e
ret nc
xor a
ret
loc_DE61:
ld a, (word_E0B6+1)
cp e
ret c
jr loc_DE59
sub_DE68:
ld hl, word_E0BC
loc_DE6B:
ld e, (hl)
inc hl
ld d, (hl)
inc hl
ld a, (hl)
out (PORT_FDD_STATUS), a
ld (MFDCUP), a
call sub_DFD7
dec de
inc hl
ld a, (de)
out (PORT_WD93_TRACK), a
ld a, (hl)
out (PORT_WD93_DATA), a
or a
ld c, 18h
jr nz, loc_DE87
ld c, 0
loc_DE87:
ld (de), a
inc hl
ld a, (hl)
out (PORT_WD93_SECTOR), a
ld a, c
out (PORT_WD93_COMMAND_STATUS), a
call sub_E00C
loc_DE92:
in a, (PORT_WD93_COMMAND_STATUS)
bit 0, a
jr nz, loc_DE92
and 50h
jp loc_DFFB
sub_DE9D:
push hl
ld a, (hl)
and 0Fh
ld hl, byte_E0BE
ld (hl), a
xor a
inc hl
ld (hl), a
inc a
inc hl
ld (hl), a
loc_DEAB:
call sub_DF86
jr z, loc_DED3
ld hl, aCanTReadDisk
call sub_DC2B
call CONIN
jr loc_DEAB
aCanTReadDisk: DB '\r\n* Can`t read disk *\r\n',0
loc_DED3:
call sub_DD70
ld hl, BUFD1
ld a, 66h
ld b, 1Fh
loc_DEDD:
add a, (hl)
inc hl
dec b
jr nz, loc_DEDD
cp (hl)
jr z, loc_DEF4
ld hl, PARDA
ld de, BUFD1+0Ah
ld bc, 15h
ldir
ld a, (hl)
ld (BUFD1+9), a
loc_DEF4:
pop hl
push hl
ld a, (MFDCUP)
and 0CFh
ld (byte_E0C3), a
ld (hl), a
inc hl
ld (hl), 0FFh
inc hl
ld de, BUFD1+10h
ld bc, 0Fh
ex de, hl
ldir
pop de
xor a
dec de
ld (de), a
dec de
ld hl, BUFD1+9
ld a, (hl)
push af
inc hl
ld a, (hl)
ld (de), a
dec de
inc hl
ld a, (hl)
ld (de), a
dec de
inc hl
ld a, (hl)
ld (de), a
dec de
pop af
ld (de), a
xor a
ret
sub_DF26:
ld hl, (word_E0BC)
ld a, (hl)
ld (byte_E0BE), a
dec hl
dec hl
ld b, (hl)
ld c, 0
ld a, (word_E0B6+1)
dec a
inc b
ld d, a
ld e, a
loc_DF39:
dec b
jr z, loc_DF43
srl e
scf
rl c
jr loc_DF39
loc_DF43:
ld a, c
and d
rra
ld (word_E0C1+1), a
ld a, 0
rra
ld (word_E0C1), a
dec hl
ld d, (hl)
dec d
ld a, (word_E0B6)
jr nz, loc_DF58
rra
loc_DF58:
ld (byte_E0BF), a
jr nc, loc_DF65
ld a, (byte_E0BE)
or 10h
ld (byte_E0BE), a
loc_DF65:
dec hl
ld d, (hl)
dec hl
ld a, (hl)
or a
jr z, loc_DF80
ld c, a
ld b, e
inc b
ld e, 0
loc_DF71:
dec b
jr z, loc_DF80
ld a, e
add a, c
cp d
jr c, loc_DF7D
jr nz, loc_DF7C
inc a
loc_DF7C:
sub d
loc_DF7D:
ld e, a
jr loc_DF71
loc_DF80:
ld a, e
inc a
ld (byte_E0C0), a
ret
sub_DF86:
call sub_DE68
ld hl, BUFD1
loc_DF8C:
ld b, 3
loc_DF8E:
call sub_DFD7
push hl
di
ld a, 84h
out (PORT_WD93_COMMAND_STATUS), a
call sub_E00C
ld c, 83h
call sub_DFAD
pop hl
and 7Eh
jr z, loc_DFFB
djnz loc_DF8E
call sub_DFEE
ld a, 80h
jr loc_DFFB
sub_DFAD:
in a, (PORT_WD93_COMMAND_STATUS)
rrca
ret nc
rrca
jr nc, sub_DFAD
ini
jr sub_DFAD
sub_DFB8:
call sub_DFD7
di
ld a, 0A4h ; '¤'
out (PORT_WD93_COMMAND_STATUS), a
call sub_E00C
ld c, PORT_WD93_DATA
call sub_DFCC
and 0FEh
jr loc_DFFB
sub_DFCC:
in a, (PORT_WD93_COMMAND_STATUS)
rrca
ret nc
rrca
jr nc, sub_DFCC
outi
jr sub_DFCC
sub_DFD7:
di
ld a, 64h
ld (COUNMO), a
ld a, (MFDCUP)
bit 5, a
jr nz, sub_DFEE
set 5, a
out (PORT_FDD_STATUS), a
ld (MFDCUP), a
call sub_E001
sub_DFEE:
ld a, 0D0h ; 'Р'
out (PORT_WD93_COMMAND_STATUS), a
call sub_E00C
loc_DFF5:
in a, (PORT_WD93_COMMAND_STATUS)
rrca
jr c, loc_DFF5
xor a
loc_DFFB:
ld (byte_E0B1), a
or a
ei
ret
sub_E001:
ld a, (MOTDEL)
ld b, a
loc_E005:
xor a
call sub_E00E
djnz loc_E005
ret
sub_E00C:
ld a, 14h
sub_E00E:
dec a
jr nz, sub_E00E
ret
loc_E012:
out (c), a
ld bc, 80h ; 'Ђ'
ldir
ld bc, PORT_ZX128
ld a, 0Fh
out (c), a
ret
loc_E021:
xor a
jr loc_E029
loc_E024:
xor a
dec a
ret
loc_E027:
ld a, 0FFh
loc_E029:
ld (byte_E0A2), a
ld a, (word_E0B6)
ld hl, NP_END
cp (hl)
jr nc, loc_E024
di
ld hl, loc_E012
ld de, 40h ; '@'
ld bc, 0Fh
ldir
ld hl, unk_BF80
ld de, BUF_BD
ld bc, 80h ; 'Ђ'
ldir
ld c, a
ld hl, unk_E0A3
add hl, bc
ld a, (hl)
push af
ld a, (word_E0B6+1)
dec a
rrca
ld e, a
and 7Fh
add a, 0C0h ; 'А'
ld d, a
ld a, 80h
and e
ld e, a
ld hl, unk_BF80
ld a, (byte_E0A2)
or a
ex de, hl
call nz, sub_E093
pop af
ld bc, PORT_ZX128
call unk_40
ld a, (byte_E0A2)
inc a
jr z, loc_E086
ld de, unk_BF80
ld hl, (word_E0B8)
ld bc, 80h ; 'Ђ'
ex de, hl
ldir
loc_E086:
ld hl, BUF_BD
ld de, unk_BF80
ld bc, 80h ; 'Ђ'
ldir
xor a
ret
sub_E093:
push hl
ld hl, (word_E0B8)
push bc
push de
ld bc, 80h ; 'Ђ'
ldir
pop hl
pop bc
pop de
ret
byte_E0A2: db 0
unk_E0A3: db 9
db 0Bh
db 0Ch
db 0Eh
db 48h ; H
db 49h ; I
db 4Ah ; J
db 4Bh ; K
db 4Ch ; L
db 4Dh ; M
db 4Eh ; N
db 4Fh ; O
byte_E0AF: db 0
byte_E0B0: db 0
byte_E0B1: db 0
byte_E0B2: db 0
db 0
db 0
db 0
word_E0B6: dw 2703h
word_E0B8: dw 8F00h
db 0
db 0
word_E0BC: dw 0DB75h
byte_E0BE: db 11h
byte_E0BF: db 1
byte_E0C0: db 5
word_E0C1: dw 300h
byte_E0C3: db 11h
db 1
db 5
word_E0C6: dw 0DB75h
byte_E0C8: db 0
db 2
db 1
word_E0CB: dw 0C00h
byte_E0CD: db 1
db 0
db 0
db 0
db 0
db 9
db 0Bh
db 0Ch
db 0Eh
db 48h ; H
db 49h ; I
db 4Ah ; J
db 4Bh ; K
db 4Ch ; L
db 4Dh ; M
db 4Eh ; N
db 4Fh ; O
db 0
db 0
db 0
db 0