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CAS2.ASM
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page
page 60,95
title CAS - BASICODE cassette interface routines
.radix 16
if1
%out >>>Pass 1...
else
%out >>>Pass 2...
endif
zero segment at 0
org 54
int15ofs label word
org 56
int15seg label word
zero ends
biosdata segment at 40
org 67
io_rom_init label word
org 71
biosbreak label byte
org 6Bh
intflag label byte
org 69
io_rom_seg label word
biosdata ends
RJNO = 0
RJMAC macro no
jmp short R&NO
R&NO:
endm
RJ macro
RJMAC %RJNO
RJNO = RJNO+1
endm
TESTPM macro label
test byte ptr cs:portmode,4
jz label
endm
%out >>> Begin van programma.
code segment
assume cs:code,ds:biosdata
org 80
parms label byte
org 100
begin: jmp entry
oldint15 dd 0
newint15 proc far
sti
cmp ah,7
jb code_ok
jmp [oldint15]
code_ok: push ds
push ax
mov ax,40
mov ds,ax
pop ax
and biosbreak,7F
call main
pop ds
ret 2
newint15 endp
%out >>> Main
main proc near
xchg ah,al
xor ah,ah
push si
mov si,ax
shl si,1
call cs:dispatch[si]
pop si
ret
main endp
dispatch dw motor_on,motor_off,read_ibm,write_ibm,read_bc,write_bc
dw set_mask
%out >>> Motor_on
motor_on proc near
TESTPM mn1
call testpr
jnc mn2
ret
mn2: push dx
mov dx,cs:port0
add dx,2
in al,dx
RJ
and al,0F7
out dx,al
pop dx
ret
mn1: in al,61
RJ
and al,0F7
mn3: out 61,al
sub ah,ah
ret
motor_on endp
%out >>> Motor_off
motor_off proc near
TESTPM mo1
call testpr
jnc mo2
ret
mo2: push dx
mov dx,cs:port0
add dx,2
in al,dx
RJ
or al,8
out dx,al
pop dx
ret
mo1: in al,61
RJ
or al,8
jmp mn3
motor_off endp
%out >>> Set_mask
set_mask proc near
mov cs:maskbyte,al
xor ah,ah
ret
set_mask endp
%out >>> TestPr
testpr proc near
push dx
push cx
push bx
mov cx,4
mov dx,cs:port0
add dx,2
tp1: in al,dx
mov bl,al
and al,1
mov ah,al
dec dx
in al,dx
inc dx
and al,40
xor al,40
or al,ah
jz tp2
cmp al,41
jne tp3
tp2: mov al,bl
xor al,1
out dx,al
loop tp1
or al,al
tp4: pop bx
pop cx
pop dx
ret
tp3: mov ah,10
stc
jmp tp4
testpr endp
%out >>> Read_IBM
read_ibm proc near
push bx
push cx
push si
mov si,7
call m_on_wait
jnc ri1
jmp ri2
ri1: in al,62
and al,10
mov intflag,al
mov dx,3f7a
ri3: test biosbreak,80
jnz ri4
dec dx
jnz ri5
ri4: jmp ri6
ri5: call onbek1
jcxz ri3
mov dx,378
mov cx,200
in al,21
RJ
or al,1
out 21,al
ri7: test biosbreak,80
jnz ri6
push cx
call onbek1
or cx,cx
pop cx
jz ri1
cmp dx,bx
jcxz ri8
jnb ri1
loop ri7
ri8: jc ri7
call onbek1
call onbek2
cmp al,16
jne ri9
pop si
pop cx
pop bx
push cx
ri10: mov io_rom_seg,0FFFF
mov dx,100
ri11: test biosbreak,80
jnz ri12
call onbek2
jc ri12
jcxz ri13
mov es:[bx],al
inc bx
dec cx
ri13: dec dx
jg ri11
call onbek2
call onbek2
sub ah,ah
cmp io_rom_seg,1D0F
jne ri14
jcxz ri15
jmp ri10
ri12: mov ah,1
ri14: inc ah
ri15: pop dx
sub dx,cx
push ax
test ah,3
jne ri16
call onbek2
jmp short ri16
ri9: dec si
jz ri6
jmp ri1
ri6: pop si
pop cx
pop bx
sub dx,dx
mov ah,4
push ax
ri16: in al,21
RJ
and al,0FE
out 21,al
call motor_off
pop ax
cmp ah,1
cmc
ret
ri2: pop si
pop cx
pop bx
ret
read_ibm endp
%out >>> onbek2
onbek2 proc near
push bx
push cx
mov cl,8
o21: push cx
call onbek1
jcxz o22
push bx
call onbek1
pop ax
jcxz o22
add bx,ax
cmp bx,6F0
cmc
lahf
pop cx
rcl ch,1
sahf
call onbek3
dec cl
jnz o21
mov al,ch
clc
o23: pop cx
pop bx
ret
o22: pop cx
stc
jmp o23
onbek2 endp
%out >>> onbek1
onbek1 proc near
mov cx,64
mov ah,intflag
TESTPM o11
push dx
mov dx,cs:port0
inc dx
o12: in al,dx
RJ
and al,80
cmp al,ah
loopz o12
pop dx
jmp short o13
o11: in al,62
RJ
and al,10
cmp al,ah
loopz o11
o13: mov intflag,al
mov al,0
out 43,al
RJ
in al,40
RJ
mov ah,al
in al,40
xchg al,ah
mov bx,io_rom_init
sub bx,ax
mov io_rom_init,ax
ret
onbek1 endp
%out >>> Write_IBM
write_ibm proc near
push bx
push cx
call m_on_wait
jnc wi1
pop cx
pop bx
ret
wi1: in al,61
RJ
and al,0FDh
or al,1
out 61,al
RJ
mov al,0B6
out 43,al
mov ax,4a0
call out41ax
mov cx,800
in al,21
or al,1
out 21,al
wi2: stc
call out41iets
loop wi2
clc
call out41iets
pop cx
pop bx
mov al,16
call onbek4
wi3: mov io_rom_seg,0FFFF
mov dx,100
wi4: mov al,es:[bx]
call onbek4
jcxz wi5
inc bx
dec cx
wi5: dec dx
jg wi4
mov ax,io_rom_seg
not ax
push ax
xchg ah,al
wi6: call onbek4
pop ax
call onbek4
or cx,cx
jnz wi3
push cx
mov cx,20
wi7: stc
call out41iets
loop wi7
pop cx
mov al,0B0
out 43,al
RJ
mov ax,1
call out41ax
in al,21
RJ
and al,0FE
out 21,al
call motor_off
sub ax,ax
ret
write_ibm endp
%out >>> onbek4
onbek4 proc near
push cx
push ax
mov ch,al
mov cl,8
o41: rcl ch,1
pushf
call out41iets
popf
call onbek3
dec cl
jnz o41
pop ax
pop cx
ret
onbek4 endp
%out >>> Out41
out41iets proc near
mov ax,4a0
jc ui1
mov ax,250
ui1: push ax
call onbek11
pop ax
out41ax: out 42,al
RJ
mov al,ah
out 42,al
ret
out41iets endp
%out >>> onbek3
onbek3 proc near
mov ax,io_rom_seg
rcr ax,1
rcl ax,1
clc
jno o31
xor ax,810
stc
o31: rcl ax,1
mov io_rom_seg,ax
ret
onbek3 endp
%out >>> M_on_wait
m_on_wait proc near
call motor_on
jc mw1
mov bl,42
mw2: mov cx,700
mw3: loop mw3
dec bl
jnz mw2
mw1: ret
m_on_wait endp
%out >>> Read_BC
read_bc proc near
push bx
push cx
push si
mov si,7
call m_on_wait
jnc rb1
jmp rb2
rb1: in al,62
and al,10
mov intflag,al
mov dx,3f7a
rb3: test biosbreak,80
jnz rb6
dec dx
jnz rb5
rb6: jmp rb7
rb8: pop cx
jmp rb1
rb5: call onbek6
jcxz rb3
jnc rb3
mov cx,0C8
in al,21
RJ
or al,1
out 21,al
rb9: test biosbreak,80
jnz rb7
push cx
call onbek6
jcxz rb8
pop cx
jcxz rb10
jnc rb1
loop rb9
rb10: jc rb9
call onbek7
jc rb11
cmp al,82
jne rb11
mov byte ptr io_rom_seg,al
pop si
pop cx
pop bx
xor dx,dx
rb15: test biosbreak,80
jnz rb12
call onbek8
jc rb12
mov ah,8
jcxz rb13
xor byte ptr io_rom_seg,al
cmp al,83
je rb14
mov ah,cs:maskbyte
not ah
and al,ah
mov es:[bx],al
inc bx
dec cx
inc dx
jmp rb15
rb14: call onbek8
xor byte ptr io_rom_seg,al
xor ah,ah
cmp io_rom_seg,0
jnz rb16
jmp rb13 ; short
rb12: mov ah,1
rb16: inc ah
rb13: push ax
test ah,0F
jnz rb17
call onbek8
jmp rb17 ; short
rb11: dec si
jz rb7
jmp rb1
rb7: pop si
pop cx
pop bx
sub dx,dx
mov ah,4
push ax
rb17: in al,21
RJ
and al,0FE
out 21,al
call motor_off
pop ax
cmp ah,1
cmc
ret
rb2: pop si
pop cx
pop bx
ret
read_bc endp
%out >>> onbek7
onbek7 proc near
push bx
push cx
jmp short o71
onbek8: push bx
push cx
o72: call onbek6
jcxz o73
jc o72
o71: mov cl,8
o74: push cx
o75: call onbek6
jcxz o76
pop cx
rcr ch,1
dec cl
jnz o74
mov al,ch
call onbek6
jcxz o73
cmc
o77: pop cx
pop bx
ret
o76: pop cx
o73: stc
jmp o77
onbek7 endp
%out >>> onbek6
onbek6 proc near
push ax
push bx
call onbek1
jcxz o61
push bx
call onbek1
pop ax
jcxz o61
add bx,ax
cmp bx,5c6
jnc o61
call onbek1
jcxz o61
push bx
call onbek1
pop ax
jcxz o61
add bx,ax
cmp bx,5c6
o61: pop bx
pop ax
ret
onbek6 endp
%out >>> Write_BC
write_bc proc near
push bx
push cx
call m_on_wait
jnc wb1
pop cx
pop bx
ret
wb1: in al,61
RJ
and al,0FDh
or al,1
out 61,al
mov al,0B6
RJ
out 43,al
mov ax,1EC
RJ
out 42,al
mov al,ah
RJ
out 42,al
mov cx,1770
TESTPM wb2
in al,21
or al,1
out 21,al
wb2: stc
call onbek9
loop wb2
mov al,82
mov byte ptr io_rom_seg,al
call onbek10
pop cx
pop bx
xor dx,dx
wb3: mov al,es:[bx]
or al,cs:maskbyte
xor byte ptr io_rom_seg,al
call onbek10
jcxz wb4
inc bx
dec cx
inc dx
jmp wb3
wb4: mov al,83
xor byte ptr io_rom_seg,al
call onbek10
mov al,byte ptr io_rom_seg
call onbek10
mov cx,1770
wb5: stc
call onbek9
loop wb5
mov al,0B0
out 43,al
RJ
mov ax,1
out 42,al
RJ
mov al,ah
out 42,al
TESTPM wb6
in al,21
RJ
and al,0FE
out 21,al
wb6: call motor_off
sub ax,ax
ret
write_bc endp
%out >>> onbek10
onbek10 proc near
push cx
push ax
clc
call onbek9
mov ch,al
mov cl,8
o101: rcr ch,1
call onbek9
dec cl
jnz o101
stc
call onbek9
call onbek9
pop ax
pop cx
ret
onbek10 endp
%out >>> onbek9
onbek9 proc near
push ax
pushf
mov ax,3da
jnc o91
mov ax,1ec
o91: call onbek11
jnc o92
push ax
out 42,al
mov al,ah
RJ
out 42,al
pop ax
call onbek11
o92: out 42,al
mov al,ah
RJ
out 42,al
popf
pop ax
ret
onbek9 endp
%out >>> onbek11
onbek11 proc near
pushf
push ax
push dx
mov dx,62
cmp cs:iets,0FC ; byte ptr
jne o111
dec dx
o111: in al,dx
and al,20
jz o111
TESTPM o112
call onbek12
o112: in al,dx
and al,20
jnz o112
TESTPM o113
call onbek12
o113: pop dx
pop ax
popf
ret
onbek11 endp
%out >>> onbek12
onbek12 proc near
push dx
mov dx,cs:port0
in al,dx
RJ
xor al,1
out dx,al
pop dx
ret
onbek12 endp
%out >>> data...
maskbyte db 80
port0 dw 0
portmode db 0
iets db 0
%out >>> hoofdroutine...
entry: assume ds:code,es:zero
push ds
mov dx,offset txt1
mov ah,9
int 21
xor ax,ax
mov es,ax
mov ax,int15ofs
mov word ptr oldint15,ax
mov ax,int15seg
mov word ptr oldint15[2],ax
push cs
pop es
call setup1
jnz s1
xor ax,ax
mov es,ax
mov ax,int15seg
mov es,ax
assume es:nothing
s1: mov al,es:portmode
call setup2
mov iets2,al
test al,4
jnz s2
mov ax,0FFFF
push es
mov es,ax
mov bl,es:[000E]
pop es
mov es:iets,bl
cmp bl,0FF
je s2
or iets2,4 ; byte ptr
s2: test iets2,4 ; byte ptr
jz s3
mov al,iets2
call setup3
jnc s3
mov dx,offset txt2
mov ah,9
int 21
mov al,iets2
and al,3
jnz s4
mov dx,offset txt3
jmp short s5
s4: or al,30
mov dl,al
mov ah,2
int 21
mov dx,offset txt4
s5: mov ah,9
int 21
call setup4
call setup1
mov dx,offset txt5
jnz s6
mov dx,offset txt6
s6: mov ah,9
int 21
pop ds
int 20
s3: mov al,iets2
mov es:portmode,al
call setup4
call setup1
jnz s7
mov dx,offset txt7
mov ah,9
int 21
pop ds
int 20
s7: push es
xor ax,ax
mov es,ax
assume es:zero
cli
mov int15ofs,offset newint15
mov int15seg,cs
sti
pop es
assume es:nothing
mov dx,offset txt8
mov ah,9
int 21
mov dx,offset entry
pop ds
int 27
%out >>> setup 2
setup2 proc near
push bx
push cx
mov bx,offset parms
mov cl,[bx]
xor ch,ch
jcxz s8
s21: inc bx
cmp byte ptr [bx],'/'
je s22
cmp byte ptr [bx],'?'
je s23
loopnz s21
jmp short s8
s22: dec cx
jcxz s8
inc bx
or byte ptr [bx],20
cmp byte ptr [bx],'p'
jne s24
or al,4
and al,0FC
dec cx
jcxz s8
inc bx
cmp byte ptr [bx],'1'
jb s25
cmp byte ptr [bx],'4'
jae s25
mov ah,[bx]
and ah,3
and al,0FC
or al,ah
jmp short s8
s24: cmp byte ptr [bx],'c'
jne s25
and al,0FBh
RJ
s8: pop cx
pop bx
ret
s23: call setup5
int 20
s25: mov dx,offset txt9
mov ah,9
int 21
jmp s23
setup2 endp
%out >>> setup 5
setup5 proc near
mov dx,offset txt10
mov ah,9
int 21
mov dx,offset txt11
test es:portmode,4
jz s51
mov dx,offset txt12
s51: mov ah,9
int 21
ret
setup5 endp
%out >>> setup 3
setup3 proc near
push bx
mov bl,al
and bl,3
jz s31
dec bl
s31: xor bh,bh
push bx
shl bx,1
mov ax,40
push es
mov es,ax
assume es:biosdata
mov dx,es:[bx+iets3]
iets3 equ 8
pop es
assume es:nothing
pop ax
inc al
or dx,dx
stc
jz s32
cmc
mov es:port0,dx
s32: pop bx
ret
setup3 endp
%out >>> setup 4
setup4 proc near
test es:portmode,4
jz s41
mov dx,offset txt2
mov ah,9
int 21
mov al,es:portmode
call setup3
and al,3
or al,30
mov dl,al
mov ah,2
int 21
mov dx,offset txt13
mov ah,9
int 21
jmp short s42
s41: mov dx,offset txt14
mov ah,9
int 21
s42: mov dx,offset txt15
mov ah,9
int 21
ret
setup4 endp
%out >>> setup 1
setup1 proc near
push es
xor ax,ax
mov es,ax
assume es:zero