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CPM
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MODEMS
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ZMODEM
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ZMO-HP12.ZZ0
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ZMO-HP12.Z80
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Text File
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2000-06-30
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14KB
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640 lines
;-----------------------------------------------------------------------------
;
; Overlay for ZMP ffor HP12X
;
; Name zmo-hp.azm
;
; set up for compile with z80mr
;
; Written by -
; Ron Murray, c/o Z-Node 62, 061-9-450-0200, Perth, Western Australia.
;
; 89/04/12 - Modified to ZMP v1.5 - George Conover
; Modified to ZMP v1.2 standard rjm 15/9/88
; Modified to ZMP v1.3 standard rjm 11/10/88
; Modified to ZMP v1.4 standard rjm 20/11/88
; Added HP code MWR 2/8/89
; Attemp at correct cursor contrl 2/10/89
;
;-----------------------------------------------------------------------------
;
;
; System-dependent code overlay for ZMODEM
;
;
;
; Insert your own code as necessary in this file. Code contained herein
; has been written in Z80 code for use with M80 or SLR. Assemble as follows:
;
; SLR ZMO-xx01/h
; MLOAD ZMP.COM=ZMODEM.COM,ZMO-xx01.HEX
; or
; M80 =ZMO-xx01.Z80
; RELHEX ZMO-xx01
; MLOAD ZMP.COM=ZMODEM.COM,ZMO-xx01.HEX
;
;
; (Don't use L80 without changing the source for assembly as a
; cseg file.)
;
;-----------------------------------------------------------------------------
;
;
; Notes on modifying this file:
;
; C requires that functions do not change either index register (IX or IY).
; If your overlay requires either of these to be changed, ensure they are
; restored to the original values on return.
; Since collecting parameters from C functions can be tricky, only change
; the parts marked 'Insert your own code here'. Do NOT modify the jump
; table at the start. Do NOT modify the entry/exit sections of each
; function. Do NOT pass 'GO'. Do NOT collect $200.
; Apart from defining modem functions, this file also defines terminal
; characteristics. Examples provided are for ADM-3A (with a few of my own
; additions). Modify to suit your own terminal. An inline print routine
; is provided for printing strings in the usual way: usage is
;
; call print
; db 'required string',0
;
;-----------------------------------------------------------------------------
;
;
; Don't forget to set your clock speed at the clkspd variable.
;
;
; If you find your overlay exceeds the maximum size (currently 0400h),
; you will have to contact me for another version. If too many people need
; to do it, we haven't allowed enough room.
;
; Ron Murray 15/8/88
;
;
;
;---------------------------------------------------------------------------
false equ 0
true equ 1
;------------------------------------------------------------------------------
; User-set variables:
clkspd equ 4 ; Processor clock speed in MHz
debug equ false ; to allow debugging of overlay with Z8E etc.
;Set the following two equates to the drive and user area which will contain
; ZMP's .OVR files, .CFG file, .FON file and .HLP file. Set both to zero
; (null) to locate them on the drive from which ZMP was invoked.
overdrive equ 'B' ; Drive to find overlay files on ('A'-'P')
overuser equ 0 ; User area to find files
;------------------------------------------------------------------------------
; NOT user-set variables
userdef equ 0145h ; origin of this overlay
; This address should not change with
; subsequent revisions.
mspeed equ 03ch ; location of current baud rate.
ovsize equ 0400h ; max size of this overlay
org userdef
esc equ 1bh
ctrlq equ 11h
cr equ 0dh
lf equ 0ah
bdos equ 5
codebgn equ $
;Jump table for the overlay: do NOT change this
jump_tab:
jp scrnpr ; screen print
jp mrd ; modem read with timeout
jp mchin ; get a character from modem
jp mchout ; send a character to the modem
jp mordy ; test for tx buffer empty
jp mirdy ; test for character received
jp sndbrk ; send break
jp cursadd ; cursor addressing
jp cls ; clear screen
jp invon ; inverse video on
jp invoff ; inverse video off
jp hide ; hide cursor
jp show ; show cursor
jp savecu ; save cursor position
jp rescu ; restore cursor position
jp mint ; service modem interrupt
jp invec ; initialise interrupt vectors
jp dinvec ; de-initialise interrupt vectors
jp mdmerr ; test uart flags for error
jp dtron ; turn DTR on
jp dtroff ; turn DTR OFF
jp init ; initialise uart
jp wait ; wait seconds
jp mswait ; wait milliseconds
jp userin ; user-defined entry routine
jp userout ; user-defined exit routine
jp getvars ; get system variables
JP SETPORT ; Set port (0 or 1)
; Spare jumps for compatibility with future versions
jp spare ; spare for later use
jp spare ; spare for later use
jp spare ; spare for later use
jp spare ; spare for later use
jp spare ; spare for later use
jp spare ; spare for later use
;
; Main code starts here
;
;Screen print function
scrnpr:
; <== Insert your own code here
call print
db 1bh,'0',0
; <== End of your own code
spare:
ret
; User-defined entry routine: leave empty if not needed
userin:
ld bc,73ffh
call bdos
; map reader and punch to port1
call print
db 'Version for HP12X Series',cr,lf,0
call print
db 1bh,'&i0s25d4M',1bh,'&i10s16d4M',cr,lf,0
; try and set up vectors for 8 bits
ld bc,7effh
ld de,jbuf
call bdos
ld hl,(jump)
ld (real),hl
ld hl,ineight
ld (jump),hl
ld a,1
ld (flag),a
ld bc,7effh
ld de,jbuf
call bdos
ret
; more hp stuff for 8 bit setup
ineight:call readin
ld a,b
ret
; end of more hp stuff for 8 bit setup
; User-defined exit routine: leave empty if not needed
userout:
; begin hp exit
call print
db 1bh,'E',0 ; cold boot system
ret
;Get a character from the modem: return in HL
mchin:
push bc
;start or HP125 code
push de
ld c,03h
call bdos
pop de
;end of HP code
ld l,a ; put in HL
ld h,0
or a ; set/clear Z
pop bc
ret
;Send a character to the modem
mchout:
ld hl,2 ; get the character
add hl,sp
ld a,(hl)
;start of HP code
push bc
push de
ld e,a
ld c,04h
call bdos
pop de
pop bc
;end of HP code
ret ; done
;Test for output ready: return TRUE (1) in HL if ok
mordy:
;start of HP code
ld h,0
ld l,1
;end of hp code
ld a,l ; set/clear Z
or a
ret
;Test for character at modem: return TRUE (1) in HL if so
mirdy:
;start of hp code
push bc
push de
ld bc,70ffh
call bdos
ld h,0
ld l,a
pop de
pop bc
;end og HP code
ld a,l ; set/clear Z
or a
ret
;Send a break to the modem: leave empty if your system can't do it
sndbrk:
; <== Insert your own code here
ld hl,300 ; wait 300 mS
call waithm
; <== End of your own code
ret
;
;Test UART flags for error: return TRUE (1) in HL if error.
mdmerr:
; <== Insert your own code here
; <== End of your own code
ld a,l ; set/clear Z
or a
ret
;Turn DTR ON
dtron:
; <== Insert your own code here
; <== End of your own code
ret
;Turn DTR OFF
dtroff:
; <== Insert your own code here
; <== End of your own code
ret
;Initialise the uart
init:
ld hl,2 ; get parameters
add hl,sp
ex de,hl
call getparm ; in HL
ld (brate),hl ; baud rate
call getparm
ld (parity),hl ; parity
call getparm
ld (data),hl ; data bits (BINARY 7 or 8)
call getparm
ld (stop),hl ; stop bits (BINARY 1 or 2)
; <== Insert your own code here
; using values below
ld (mspeed),a ; don't forget to load mspeed with the
; current brate value if the new rate is
; valid. See table of values below.
; <== End of your own code
ret
;--------------------------------------------------------------------------
stop: dw 1 ; stop bits
parity: dw 'N' ; parity
data: dw 8 ; data bits
brate: dw 7 ; baud rate:
;--------------------------------------------------------------------------
;Values of brate for each baud rate
;
; baud rate brate
;
; 110 0
; 300 1
; 450 2
; 600 3
; 710 4
; 1200 5
; 2400 6
; 4800 7
; 9600 8
; 19200 9
; 38400 10
; 57600 11
; 76800 12
;
;
; Set the port. ZMP supplies either 0 or 1 as a parameter.
;
setport:
ld hl,2 ; get port number
add hl,sp
ex de,hl
call getparm ; in HL (values are 0 and 1)
; <== Insert your own code here
; <== End of your own code
ret
;****************************************************************************
;Video terminal sequences: for the HP125
;Cursor addressing:
cursadd:
ld hl,2 ; get parameters
add hl,sp
ex de,hl
call getparm ; in HL
ld (row),hl ; row
call getparm
ld (col),hl ; column
; <== Insert your own code here
; using values in row and col
;start hp sequence
call print
db esc,'&a',0
push bc
push de
push hl
ld hl,(row)
call conv
ld a,(tens)
call cout
ld a,(digits)
call cout
ld a,'r'
call cout
ld hl,(col)
call conv
ld a,(tens)
call cout
ld a,(digits)
call cout
ld a,'C'
call cout
pop hl
pop de
pop bc
ret
; <== end of your own code
;more hp code for cursor control
conv: ld de,0000h
ld bc,000ah
loop16: sbc hl,bc
jp m,done
inc e
jp loop16
done: add hl,bc
ld a,l
add a,48
ld (digits),a
ld a,e
add a,48
ld (tens),a
ret
digits: ds 1
tens: ds 1
; end of hp added code for cursor control
row: ds 2 ; row
col: ds 2 ; column
;Clear screen:
cls:
call print
db 1bh,'H',1bh,'J',0
ret
;Inverse video on:
invon:
call print
db 1bh,'&dA',0
ret
;Inverse video off:
invoff:
call print
db 1bh,'&d@',0
ret
;Turn off cursor:
hide:
ret
;Turn on cursor:
show:
ret
;Save cursor position:
savecu:
ret
;Restore cursor position:
rescu:
ret
;****************************************************************************
;Service modem interrupt:
mint:
ret ; my system doesn't need this
;Initialise interrupt vectors:
invec:
ret ; ditto
;De-initialise interrupt vectors:
dinvec:
ret ; ditto
;****************** End of user-defined code ********************************
; Do not change anything below here.
;Modem character test for 100 ms
mrd:
push bc ; save bc
ld bc,100 ; set limit
mrd1:
call mirdy ; char at modem?
jr nz,mrd2 ; yes, exit
ld hl,1 ; else wait 1ms
call waithm
dec bc ; loop till done
ld a,b
or c
jr nz,mrd1
ld hl,0 ; none there, result=0
xor a
mrd2:
pop bc
ret
; Inline print routine: destroys A and HL
print:
ex (sp),hl ; get address of string
ploop:
ld a,(hl) ; get next
inc hl ; bump pointer
or a ; done if zero
jr z,pdone
call cout ; else print
jr ploop ; and loop
pdone:
ex (sp),hl ; restore return address
ret ; and quit
;
;Output a character in A to the console
;
cout:
push bc ; save regs
push de
push hl
ld e,a ; character to E
ld c,2
call bdos ; print it
pop hl
pop de
pop bc
ret
;Wait(seconds)
wait:
ld hl,2
add hl,sp
ex de,hl ; get delay size
call getparm
; fall thru to..
;Wait seconds in HL
waithls:
push bc ; save bc
push de ; de
push ix ; and ix
ld ix,0 ; then point ix to 0
; so we don't upset memory-mapped i/o
;Calculate values for loop constants. Need to have two loops to avoid
; 16-bit overflow with clock speeds above 9 MHz.
outerval equ (clkspd/10)+1
innerval equ (6667/outerval)*clkspd
wait10:
ld b,outerval
wait11:
ld de,innerval
wait12:
bit 0,(ix) ; time-wasters
bit 0,(ix)
bit 0,(ix) ; 20 T-states each
bit 0,(ix)
bit 0,(ix)
bit 0,(ix)
dec de
ld a,e
ld a,d
or e
jr nz,wait12 ; 150 T-states per inner loop
djnz wait11 ; decrement outer loop
dec hl ; ok, decrement count in hl
ld a,h
or l
jr nz,wait10
pop ix ; done -- restore ix
pop de ; de
pop bc ; and bc
ret
;Wait milliseconds
mswait:
ld hl,2
add hl,sp
ex de,hl ; get delay size
call getparm
; fall thru to..
;Wait milliseconds in HL
waithm:
push de
w1ms0:
ld de,39*clkspd
w1ms1:
dec de
ld a,d
or e
jr nz,w1ms1
dec hl
ld a,h
or l
jr nz,w1ms0
pop de
ret
;Get next parameter from (de) into hl
getparm:
ex de,hl ; get address into hl
ld e,(hl) ; get lo
inc hl
ld d,(hl) ; then hi
inc hl ; bump for next
ex de,hl ; result in hl, address still in de
ret
;Get address of user-defined variables
getvars:
ld hl,uservars
ret
uservars:
dw overdrive ; .OVR etc. drive/user
dw overuser
;add hp stuff
readin: db 0c3h
real: ds 2
jvn: db 7
flag: db 0
opcode: ds 1
jump: ds 2
jbuf: equ jvn
;end added hp stuff
end