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rsxio.mac
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;**********************************************************************;
; ;
; This file is part of ZSM4, a Z80/Z180/Z280 relocatable macro- ;
; assembler written in Z80 assembly. ;
; Copyright (C) 2017-2023, Hector Peraza. ;
; ;
; This program is free software; you can redistribute it and/or ;
; modify it under the terms of the GNU General Public License as ;
; published by the Free Software Foundation; either version 2 of ;
; the License, or (at your option) any later version. ;
; ;
; This program is distributed in the hope that it will be useful, ;
; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
; GNU General Public License for more details. ;
; ;
; You should have received a copy of the GNU General Public License ;
; along with this program; if not, write to the Free Software ;
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ;
; ;
;**********************************************************************;
TITLE Z80 Assembler - System-dependent routines - RSX180 version
.Z80
include ZSM.INC
include SYSFN.INC
include FCB.INC
include GCML.INC
include TCB.INC
include FCSLIB.INC
include ERRORS.INC
; rqst SYSLIB,FCSLIB
public GNB,WNB,WNB2,CLINE,WLINE,REWIND,CLSINP
public CLOSE1,CLOSE2,OPNLIB,CLSLIB,INCLVL,INCMEM
extrn Z80ASM,HOFNAM,LFLAG,OFLAG,QFLAG,ERRFLG,CMPHD
extrn MAXMEM,SYMTBL,VALID,MALLOC,MFREE,FNDREC,NAMLEN
extrn FNDNXT,DSPTR,PTR1,HOFDAT,HOFTIM,CNV2HX,UMODE
extrn ZERODS,DEFCPU,RADIX,CMNPTR,ERRCNT
extrn GCML,RCML,UCASE,PERROR,TTFLSH,PUTCH,PUTSTR
extrn PFN,FOPEN,FCREAT,FGETCH,FPUTCH,FCLOSE,FPOS
extrn INIFCB,FSEEK,HLDEC,BCD2BIN,RCTRLO
ESC equ 1Bh
LUNCML equ 1 ; LUN for command file
LUNOBJ equ 2 ; LUN for object file
LUNLST equ 3 ; LUN for listing file
LUNMAC equ 6 ; LUN 6 is used for source file
; and 7,8,9,10,11 for INCLUDE files
cseg
;-----------------------------------------------------------------------
SUBTTL Initializations
; Command syntax is as follows:
;
; MAC [objfile][,[lstfile]]=srcfile[/option][/option...]
; or
; MAC @cmdfile
;
; where option can be:
;
; /L force generation of listing file
; /Sn set max length of symbols in REL file (default = 6)
; /U assume all Undefined symbols are External
; /M initialize DEFS data areas to zero
; /Zn set initial processor type to Z80, Z180 or Z280
; (n=0, 1 or 2 respectively; defaults to 0 = Z80)
; /Iddn:[dir] define an include file search path
; /Dsym[=val] define symbol and optionally assign a value to it
START: ld sp,STACK
call INIT ; get task name and set prompt
m1: call TTFLSH
ld iy,GDAT
call GCML ; get command line tail
jr c,m2 ; jump on error
ld (PTR1),hl ; save pointer to command tail
call PROCESS ; process the command
call UPDEXC ; update program exit code
jr m1 ; loop for more
m2: cp E.EOF ; end of command file?
jr z,m3 ; exit normally if yes
call CMLERR ; else display error
ld iy,GDAT
call RCML ; reset command state
jr m1 ; and loop
m3: call TTFLSH
ld hl,(EXITC) ; fetch exit code
SC .EXIT ; exit
;-----------------------------------------------------------------------
; Get task name and setup default prompt
INIT: ld hl,0
ld de,GTKBUF
SC .GTSK ; get task info
ld hl,GTKBUF+GT.NAME
call ckdots ; skip initial 3 dots if present
push hl
ld de,(GDAT+G.PRM) ; set prompt to our task name
inc de
inc de
ld bc,3
ldir
pop hl
ld de,errpfx+2 ; set task name in error message prefix
ld bc,3
ldir
ld hl,EX.SUC
ld (EXITC),hl ; default to 'success' exit code
ret
ckdots: ld b,3
push hl
ckd1: ld a,(hl)
cp '.'
jr nz,ckd2
inc hl
djnz ckd1
inc sp
inc sp
ret
ckd2: pop hl
ret
;-----------------------------------------------------------------------
; Print error message in the form 'MAC -- message'.
CMDERR: ld hl,snerr
ERROR: push hl
call RCTRLO ; resume output, if suspended
ld hl,errpfx
call PUTSTR ; output program name
pop hl
call PUTSTR ; output message
call ATLINE
ld c,CR
call PUTCH
call UPDERR ; update exit code
scf
ret
snerr: db 'Command syntax error',0
; Like the above one, but displays a standard error message.
SYSERR: push af
call RCTRLO ; resume output, if suspended
ld hl,errpfx
call PUTSTR ; output program name
pop af
call PERROR ; output system error message
call ATLINE ; and line number of command file
ld c,CR
call PUTCH
ld hl,EX.SEV ; system errors are always 'severe'
ld (EXITC),hl
scf
ret
; Display GCML or system error message
CMLERR: or a
jp m,SYSERR
ld hl,ERROR
push hl
cp GE.OK ; check for GCML codes
ld hl,msgok
ret z
cp GE.SN
ld hl,snerr
ret z
cp GE.LEN
ld hl,msglen
ret z
cp GE.NLV
ld hl,msgnlv
ret z
pop hl
jp SYSERR ; else is a system error
msgok: db 'No error',0
msglen: db 'Line too long in command file',0
msgnlv: db 'Command nesting level too deep',0
; Display line number of indirect file where error happened
ATLINE: ld hl,GDAT+G.ST
bit GS.FIL,(hl) ; command line active?
ret z ; return if not, command is from terminal
ld hl,(GDAT+G.LN)
ld a,h ; ensure line number is valid
or l
ret z
push hl
ld hl,atln
call PUTSTR
pop hl
xor a
jp HLDEC ; display line number and return
atln: db ' at line ',0
; Update exit code
UPDEXC: ld hl,(ERRCNT) ; get error count
ld a,h
or l ; any errors?
ret z ; no, return
UPDERR: ld hl,(EXITC) ; else get current exit code
ld a,l
cp EX.SEV ; severe error?
ret nc ; yes, return
ld hl,EX.ERR ; else set to error
ld (EXITC),hl
ret
;-----------------------------------------------------------------------
; Get next non-blank char. Returns Z flag set on end of line.
GETNB: ld a,(de)
call ISEOL
ret z
cp ' '
ret nz
inc de
jr GETNB
; Return Z if char in A is end-of-line.
ISEOL: or a
ret z
cp CR
ret z
cp LF
ret z
cp ESC
ret z
cp EOF
ret
;-----------------------------------------------------------------------
; Parse the command line, get file names and options
PARSE: ld hl,(SYMTBL)
ld (SYMPTR##),hl
ld (hl),0 ; reset symbol table
ld hl,(MAXMEM)
ld (DSPTR##),hl
ld (hl),0 ; reset dynamic memory storage
xor a ; setup default options
ld (UMODE),a ; Undefined symbols do not default to External
ld (ZERODS),a ; no DS zeroing
ld (DEFCPU),a ; CPU is Z80
ld (OPTSW),a
ld (INCDIR),a ; no additional include dir
ld a,6
ld (NAMLEN),a ; REL symbol length = 6
ld hl,10
ld (RADIX),hl ; default radix = 10 (for /D option)
ld hl,0
ld (CMNPTR),hl ; clear COMMON pointer (for /D option)
ld hl,(PTR1)
ld ix,OFNAME
call PFN ; parse object file name
jp c,CMDERR
ld ix,LFNAME
call INIFCB ; no listing file unless explicitly indicated
ld a,(hl) ; see where PFN stopped
cp ','
jr nz,par0
ld a,(OPTSW)
or 01h
ld (OPTSW),a
inc hl
call PFN ; parse listing file name
jp c,CMDERR
ld a,(hl)
par0: cp '='
jp nz,CMDERR ; must be equal sign
inc hl
ld ix,IFNAME
call PFN ; parse input file name
jp c,CMDERR
ld (PTR1),hl
par1: ld de,(PTR1)
par2: call GETNB ; get next non-blank char
call ISEOL ; end of line?
ret z ; return if yes
cp '/' ; switch?
jp nz,CMDERR ; error if not
inc de
ld a,(de) ; get switch
or a
jp z,CMDERR
inc de
ld (PTR1),de
call UCASE
cp 'L' ; /L (force listing)
jr z,swlst
cp 'Z' ; /Zcpu (default CPU type)
jr z,swcpu
cp 'D' ; /Dsymbol[=value] (define symbol)
jr z,swdef
cp 'S' ; /Sn (set max REL symbol length)
jr z,swlen
cp 'X' ; /X (generate cross-ref data)
jp z,swxrf
cp 'U' ; /U (assume undefined are externals)
jp z,swuex
cp 'M' ; /M (init DS to zeros)
jp z,swzds
cp 'I' ; /Idir (define INCLUDE dir)
jp z,swinc
jp CMDERR
swlst: ld a,(OPTSW)
or 02h
ld (OPTSW),a
jr par1
swcpu: ld a,(de)
sub '0'
jp c,CMDERR
cp 2+1
jp nc,CMDERR
ld (DEFCPU),a ; set CPU type
inc de
jr par2
swdef: ld (PTR1),de ; set text pointer for ID routine
call ID##
ld a,(IDLEN##)
or a
jp z,CMDERR ; symbol name required
call GNC##
cp '='
ld hl,0
jr nz,def0 ; if no value specified, assume 0
call INT## ; else convert value
ld hl,(INTBUF##)
def0: ld (VAL##),hl
ld a,GBLSYM ; symbol is Global
ld (SYMMOD##),a
call ADDSYM## ; enter symbol
; jp c,... ; error - can't enter symbol (unlikely)
; jp z,... ; error - multiple defined (ignore/redefine)
ld hl,(IDADR##)
ld a,(hl)
and 0Fh ; clear undef bit
add a,EQUNAME ; treat like EQU
ld (hl),a
jp par1
swlen: ld a,(de)
cp '5'
jp c,CMDERR
cp '8'+1
jp nc,CMDERR
sub '0'
ld (NAMLEN),a ; set REL symbol length
inc de
jp par2
swuex: ld a,1
ld (UMODE),a
jp par1
swzds: ld a,1
ld (ZERODS),a
jp par1
swinc: ld a,(INCDIR)
or a ; additional include path already specified?
jp nz,CMDERR ; error if yes
ld ix,-FNSZ
add ix,sp ; create temporary storage on stack
ld sp,ix ; for PFN call
ex de,hl
call PFN ; parse filespec
ld (PTR1),hl ; remember where we stopped
ld a,(ix+F.ATTR)
ld c,a
and NOT (FN.DEV OR FN.DIR)
jr nz,swinc3 ; only device name and/or directory are allowed
ld a,c
and FN.DEV OR FN.DIR
jr z,swinc3 ; and at least one of the two must be present
ld a,c
ld (INCDIR),a ; store flags
and FN.DEV ; device name specified?
ld a,c
jr z,swinc1 ; no, skip
push ix
pop hl
ld de,F.DEV
add hl,de
ld de,INCDIR+1
ld bc,3
ldir ; copy device name
swinc1: and FN.DIR ; directory specified?
jr z,swinc2 ; no, return
push ix
pop hl
ld de,F.DIR
add hl,de
ld de,INCDIR+1+3
ld bc,9
ldir ; copy directory name
swinc2: ld hl,FNSZ ; restore stack
add hl,sp
ld sp,hl
jp par1 ; and continue
swinc3: ld hl,FNSZ
add hl,sp
ld sp,hl ; restore stack
jp CMDERR ; and report error
swxrf:
;...
jp par1
addhla: add a,l
ld l,a
ret nc
inc h
ret
chkeq: ld hl,(PTR1)
ld a,(hl)
cp '='
ret nz
inc hl
ld (PTR1),hl
ret
;----------------------------------------------------------------------
; Process the command
PROCESS:
; initialize variables
ld hl,(GTKBUF+GT.END)
;; dec hl
ld (MAXMEM),hl ; save max memory address
ld hl,($MEMRY)
ld (SYMTBL),hl ; save start of symbol table
; ld (SYMPTR),hl
ld iy,FFLAGS
ld (iy),0
; parse the command line and setup header fields
call PARSE
ret c ; return on error
; open input file
ld a,(IFNAME+F.ATTR)
and FN.EXT
jr nz,proc1
ld hl,MACEXT
ld de,IFNAME+F.EXT
ld bc,3
ldir
ld a,(IFNAME+F.ATTR)
or FN.EXT
ld (IFNAME+F.ATTR),a
proc1: ld ix,IOB1
ld a,LUNMAC
ld (ix+FC.LUN),a
ld (ix+FC.MODE),1 SHL FM.RD
call FOPEN
jp c,SYSERR
ld hl,CLSFIL
push hl
set 0,(iy) ; input file successfully open
; create object file
ld a,(OFNAME+F.ATTR)
or a ; output file specified?
jr nz,proc2 ; branch if yes
ld c,a
ld a,(OPTSW)
and 01h ; comma present (no object wanted)?
ld a,'Z'
ld (OFLAG),a
jr nz,proc5 ; skip object file creation if yes
ld a,'@'
ld (OFLAG),a
ld a,c
proc2: and FN.NAME ; name specified?
jr nz,proc3 ; branch if yes
ld hl,IFNAME+F.NAME
ld de,OFNAME+F.NAME
ld bc,9
ldir ; if no output name given use input.OBJ
ld a,(OFNAME+F.ATTR)
or FN.NAME
ld (OFNAME+F.ATTR),a
proc3: ld a,(OFNAME+F.ATTR)
and FN.EXT ; extension specified?
jr nz,proc4 ; branch if yes
ld hl,OBJEXT ; else use .OBJ
ld de,OFNAME+F.EXT
ld bc,3
ldir
ld a,(OFNAME+F.ATTR)
or FN.EXT
ld (OFNAME+F.ATTR),a
proc4: ld ix,IOB2
ld (ix+FC.MODE),1 SHL FM.WR
ld de,0
ld c,0
xor a ; non-contiguous file
call FCREAT ; create the file
jp c,SYSERR
set 1,(iy) ; object file successfully created
; create listing file
proc5: ld a,(LFNAME+F.ATTR)
or a ; listing file specified?
jr nz,proc6
ld c,a
ld a,(OPTSW)
and 02h ; /L switch specified?
ld a,'Z'
ld (LFLAG),a
jr z,proc9 ; skip listing file creation if not
ld a,'@'
ld (LFLAG),a
ld a,c
proc6: and FN.NAME
jr nz,proc7
ld hl,IFNAME+F.NAME
ld de,LFNAME+F.NAME
ld bc,9
ldir ; if no output name given use input.LST
ld a,(LFNAME+F.ATTR)
or FN.NAME
ld (LFNAME+F.ATTR),a
proc7: ld a,(LFNAME+F.ATTR)
and FN.EXT
jr nz,proc8
ld hl,LSTEXT
ld de,LFNAME+F.EXT
ld bc,3
ldir
ld a,(LFNAME+F.ATTR)
or FN.EXT
ld (LFNAME+F.ATTR),a
proc8: ld ix,IOB3
ld (ix+FC.MODE),1 SHL FM.WR
ld de,0
ld c,0
xor a ; non-contiguous file
call FCREAT
jp c,SYSERR
set 2,(iy) ; listing file successfully created
; header line message
proc9: ld hl,IFNAME+F.NAME
ld de,HOFNAM
ld bc,9
ldir ; set file name
ld hl,-8
add hl,sp ; allocate 8-byte buffer
ld sp,hl
SC .GDAT ; get system time
jr c,dt1
ld ix,0
add ix,sp
ld hl,HOFDAT ; address to store date
ld a,(ix+3) ; day
call CNV2HX
ld a,(ix+2) ; month
call BCD2BIN
dec a ; make it base 0
add a,a
add a,a ; *4
ex de,hl ; DE = dst
ld hl,MONTHS
call ADDHLA ; HL = src
ld bc,5
ldir ; store month name and separators
ex de,hl
ld a,(ix+0) ; year
call CNV2HX
ld a,(ix+1) ; year
call CNV2HX
ld hl,HOFTIM ; address to store time
ld a,(ix+4) ; hours
call CNV2HX
ld (hl),':'
inc hl
ld a,(ix+5) ; min
call CNV2HX
ld (hl),':'
inc hl
ld a,(ix+6) ; sec
call CNV2HX
dt1: ld hl,8
add hl,sp
ld sp,hl ; cleanup stack
xor a
ld (INCLVL),a
dec a
ld (QFLAG),a
pop hl ; the assembler will call the
; file close functions
jp Z80ASM ; call the assembler and return
CLSFIL: bit 0,(iy) ; input file open?
jr z,clsf1
ld ix,IOB1 ; yes, close it
call FCLOSE
clsf1: bit 1,(iy) ; object file open?
jr z,clsf2
ld ix,IOB2 ; yes, close it
call FCLOSE
clsf2: bit 2,(iy) ; listing file open?
ret z
ld ix,IOB3 ; yes, close it
call FCLOSE
ret
MACEXT: db 'MAC'
OBJEXT: db 'OBJ'
LSTEXT: db 'LST'
MONTHS: db '-Jan-Feb-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec-'
SUBTTL Console, Printer and File I/O
; WLINE - Write line to list device and append newline
; HL -> buffer, term = null
WLINE: call PUTSTR
ld c,LF
call PUTCH
ld c,CR
jp PUTCH
; CLINE - Write line to console and append newline
; HL -> buffer, term = null
CLINE: ld c,LF
call PUTCH
call PUTSTR
ld c,CR
jp PUTCH
; GNB - Get next byte (IOB1)
GNB: push ix
push hl
push de
push bc
ld ix,IOB1
call FGETCH
jr nc,GNB1
cp E.EOF
call nz,SYSERR
ld a,EOF
GNB1: and 7Fh ; strip parity bit
bit FM.TT,(ix+FC.MODE)
jr z,GNB2
cp CR
jr nz,GNB2
ld a,LF
GNB2: pop bc
pop de
pop hl
pop ix
ret
; REWIND - Rewind input file
REWIND: ld a,(INCLVL)
or a
jr z,REW1
call CLSLIB ; close any open INCLUDE files
jr REWIND
REW1: push ix
ld de,0
ld bc,0
ld ix,IOB1
call FSEEK
call c,SYSERR
pop ix
ret
; CLSINP - Close input file
CLSINP: ld a,(INCLVL)
or a
jr z,CLS0
call CLSLIB ; close any open INCLUDE files
jr CLSINP
CLS0: ld ix,IOB1
jp FCLOSE
; WNB - Write next byte (LST)
; Byte in A reg
WNB: ld iy,FFLAGS
bit 2,(iy)
scf
ret z
push ix
and 7Fh ; strip parity bit
ld ix,IOB3
call FPUTCH
pop ix
ret nc
res 2,(iy)
jp SYSERR
; WNB2 - Write next byte (OBJ)
WNB2: ld iy,FFLAGS
bit 1,(iy)
scf
ret z
push ix
ld ix,IOB2
call FPUTCH
pop ix
ret nc
res 1,(iy)
jp SYSERR
; CLOSE1 - Close LST file
CLOSE1: push ix
ld ix,IOB3
jr CLOSE
; CLOSE2 - Close OBJ file
CLOSE2: push ix
ld ix,IOB2
CLOSE: call FCLOSE
call c,SYSERR
pop ix
ret
; OPNLIB - Open MACLIB or INCLUDE file
; HL points to file name
;
; Input file structure as saved in high memory:
;
; db STINPF ; type = include/input file state
; dw len ; length of the following fields:
; ds 4 ; current file position
; ds 1 ; current FC.MODE
; db lun ; current LUN
; ds FINFSZ ; current file name block
OPNLIB: ld a,(INCLVL)
cp 5 ; check nested include level
jp nc,FNERR1 ; error if above maximum
push hl
ld bc,4+1+1+FINFSZ ; file pos + LUN + mode + file name
ld e,STINPF ; type = file
call MALLOC ; allocate block
pop de
ret c ; on error, return
push hl ; save block address
push de ; save pointer to file name
ld ix,IOB1
call FPOS
call c,SYSERR
ld (hl),c ; store source file position
inc hl
ld (hl),b
inc hl
ld (hl),e
inc hl
ld (hl),d
inc hl
ld a,(IOB1+FC.MODE)
ld (hl),a ; store FC.MODE
inc hl
ld a,(IOB1+FC.LUN)
ld (hl),a ; store LUN
inc a
ld (IOB1+FC.LUN),a ; new LUN
inc hl
ex de,hl ; DE = address to store FDB
ld hl,IFNAME
ld bc,FINFSZ
ldir ; store FDB
pop hl ; restore ptr to filename
ld ix,IFNAME ; FDB address in IX
call PFN ; parse file name
push hl
jp c,FNERR ; bad file name
ld a,(ix+F.ATTR)
and FN.EXT
jr nz,OPN1
ld de,IFNAME+F.EXT
ld hl,MACEXT ; default include extension is .MAC
ld bc,3
ldir
OPN1: ld ix,IOB1
ld (ix+FC.MODE),1 SHL FM.RD
call FOPEN ; open file
jr nc,OPN4 ; branch on success
ld a,(IFNAME+F.ATTR)
and FN.DEV OR FN.DIR ; include file with explicit device and/or dir?
jr nz,FNERR ; yes, error
ld a,(INCDIR)
or a ; search include path specified?
jr z,FNERR ; no, return error
ld c,a
and FN.DEV ; search path specifies a device?
ld a,c
jr z,OPN2 ; no, try directory
ld hl,INCDIR+1
ld de,IFNAME+F.DEV
ld bc,3
ldir ; else copy device name
ld c,a
ld hl,IFNAME+F.ATTR
ld a,(hl)
or FN.DEV ; set bit in attributes field
ld (hl),a
ld a,c
OPN2: and FN.DIR ; search path specifies a directory?
jr z,OPN3 ; no, skip
ld hl,INCDIR+1+3
ld de,IFNAME+F.DIR
ld bc,9
ldir ; else copy directory name
ld hl,IFNAME+F.ATTR
ld a,(hl)
or FN.DIR ; set bit in attributes field
ld (hl),a
OPN3: ld (ix+FC.MODE),1 SHL FM.RD
call FOPEN ; try again
jr c,FNERR ; no can do
OPN4: pop hl
ex (sp),hl ; drop block address, save record pointer
ld hl,INCLVL
inc (hl)
pop hl ; restore record pointer
or a
ret
FNERR: pop hl
ex (sp),hl ; restore block address, save record pointer
push hl ; push block address
ld de,4
add hl,de
ld a,(hl)
ld (IOB1+FC.MODE),a
inc hl
ld a,(hl)
ld (IOB1+FC.LUN),a ; restore old LUN
inc hl
ld de,IFNAME
ld bc,FINFSZ
ldir ; restore old FDB
pop hl ; pop block address
dec hl
dec hl
dec hl
call MFREE ; free allocated block
pop hl ; restore record pointer
FNERR1: ld a,'V'
ld (ERRFLG),a ; set error flag
scf
ret
; CLSLIB - Close current MACLIB or INCLUDE file
CLSLIB: ld a,(INCLVL)
or a
ret z ; nothing to do, no INCLUDEs active
dec a
ld (INCLVL),a
ld ix,IOB1
call FCLOSE ; close current file
ld c,STINPF
call FNDREC ; get previous file record
; jp c,... ; should not happen
push hl ; save start of file record
inc hl
inc hl
inc hl
ld c,(hl) ; get starting file position
inc hl
ld b,(hl)
inc hl
ld e,(hl)
inc hl
ld d,(hl)
inc hl
ld a,(hl) ; get FC.MODE
res FS.BV,a ; buffer is no longer valid
ld (IOB1+FC.MODE),a
inc hl
ld a,(hl) ; get LUN
ld (IOB1+FC.LUN),a
inc hl
push bc
push de
ld de,IFNAME
ld bc,FINFSZ
ldir ; restore FDB
pop de
pop bc
ld ix,IOB1
call FSEEK ; restore prev file position
call c,SYSERR
pop hl ; pop start of record
call MFREE ; release storage
or 0FFh ; NZ
ret