TITLE	'LRUNZ  Library Run for ZCPR2 -- a utility for .LBR files'
VERSION EQU	1$0	;82-08-06 Initial source release
	PAGE	60
;
; Requires MAC for assembly.  Due to the complexity of
; the relocation macros, this program may take a while
; to assemble.	Be prepared for periods of no disk activity
; on both passes before pressing panic button.	G.P.N.
;

;--------------------------NOTICE------------------------------
;
;   (c) Copyright 1982	Gary P. Novosielski
;	All rights reserved.
;	
;   The following features courtesy of Ron Fowler:
;	1) command line reparsing and repacking (this allows
;	the former load-only program to become a load & run
;	utility).
;	2) code necessary to actually execute the loaded file
;	3) the HELP facility (LRUN with no arguments)
;	4) modified error routines to avoid warm-boot delay
;	   (return to CCP directly instead)
;	
;	Permission to distribute this program in source or
;	object form without prior written aproval is granted
;	only under the following conditions.
;
;		1. No charge is imposed for the program.
;		2. Charges for incidental costs including
;		   but not limited to media, postage, tele-
;		   communications, and data storage do not
;		   exceed those costs actually incurred.
;		3. This Notice and any copright notices in
;		   the object code remain intact 
;
;			(signed)  Gary P. Novosielski
;
;--------------------------------------------------------------
;
; LRUN is intended to be used in conjunction with libraries
; created with LU.COM, a library utility based upon the
; groundwork laid by Michael Rubenstien, with some additional
; inspiration from Leor Zolman's CLIB librarian for .CRL files.
;
; The user can place the less frequently used command (.COM)
; files in a library to save space, and  still be able to run
; them when required, by typing:
; 	LRUN <normal command line>.
; The name of the library can be specified, but the greatest
; utility will be achieved by placing all commands in one
; library called COMMAND.LBR, or some locally defined name,
; and always letting LRUN use that name as the default.
;

;Syntax:
;	LRUN [-<lbrname>] <command> [<parameters>]
;
;where:
;<lbrname>	is the optional library name.  In the
;		distrubution version, this defaults to
;		COMMAND.LBR.  If the user wishes to use a
;		different name for the default, the 8-byte
;		literal at DFLTNAM below may be changed to
;		suit local requirements. The current drive
;		is searched for the .LBR file, and if not
;		found there, the A: drive is searched.
;		**Note that the leading minus sign (not a part
;		of the name) is required to indicate an
;		override library name is being entered.
;
;<command>	is the name of the .COM file in the library
;
;<line>		is the (possibly empty) set of parameters
;		which are to be passed to <command>, as in
;		normal CP/M syntax.  Notice that if the
;		library name is defaulted, the syntax is
;		simply:
;     LRUN <command line>
;		which is just the normal command line with
;		LRUN prefixed to it.
;
;Wheel Mod	If the 'CMDRUN' facility of ZCPR3 is enabled
		then it is very handy to take all of your less
		often used command files and place them in a
		'COMMAND.LBR' and rename LRUNZ to CMDRUN.
		Then whenever a command is not found by the
		CCP if will run 'CMDRUN' (actually LRUNZ3) which
		will look in the 'COMMAND.LBR' and run the command.
		Furthermore if you enable the 'ROOTONLY' ZCPR3 option
		then the CCP will automatically look at A:15 only
		for 'CMDRUN' which will then look for 'COMMAND.LBR'
		and run the command. This change to enable the 
		Wheel Byte is almost an exact copy of PIP-ZCPR by
 		John D'Amico
               
					Richard Cole
					  
;
; MACROS TO PROVIDE Z80 EXTENSIONS
;   MACROS INCLUDE:
;
$-MACRO 		;FIRST TURN OFF THE EXPANSIONS
;
;	JR	- JUMP RELATIVE
;	JRC	- JUMP RELATIVE IF CARRY
;	JRNC	- JUMP RELATIVE IF NO CARRY
;	JRZ	- JUMP RELATIVE IF ZERO
;	JRNZ	- JUMP RELATIVE IF NO ZERO
;	DJNZ	- DECREMENT B AND JUMP RELATIVE IF NO ZERO
;	LDIR	- MOV @HL TO @DE FOR COUNT IN BC
;	LXXD	- LOAD DOUBLE REG DIRECT
;	SXXD	- STORE DOUBLE REG DIRECT
;
;
;
;	@GENDD MACRO USED FOR CHECKING AND GENERATING
;	8-BIT JUMP RELATIVE DISPLACEMENTS
;
@GENDD	MACRO	?DD	;;USED FOR CHECKING RANGE OF 8-BIT DISPLACEMENTS
	IF (?DD GT 7FH) AND (?DD LT 0FF80H)
	DB	100H	;Displacement Range Error on Jump Relative
	ELSE
	DB	?DD
	ENDIF
	ENDM
;
;
; Z80 MACRO EXTENSIONS
;
JR	MACRO	?N	;;JUMP RELATIVE
	DB	18H
	@GENDD	?N-$-1
	ENDM
;
JRC	MACRO	?N	;;JUMP RELATIVE ON CARRY
	DB	38H
	@GENDD	?N-$-1
	ENDM
;
JRNC	MACRO	?N	;;JUMP RELATIVE ON NO CARRY
	DB	30H
	@GENDD	?N-$-1
	ENDM
;
JRZ	MACRO	?N	;;JUMP RELATIVE ON ZERO
	DB	28H
	@GENDD	?N-$-1
	ENDM
;
JRNZ	MACRO	?N	;;JUMP RELATIVE ON NO ZERO
	DB	20H
	@GENDD	?N-$-1
	ENDM
;
DJNZ	MACRO	?N	;;DECREMENT B AND JUMP RELATIVE ON NO ZERO
	DB	10H
	@GENDD	?N-$-1
	ENDM
;
LDIR	MACRO		;;LDIR
	DB	0EDH,0B0H
	ENDM
;
LDED	MACRO	?N	;;LOAD DE DIRECT
	DB	0EDH,05BH
	DW	?N
	ENDM
;
LBCD	MACRO	?N	;;LOAD BC DIRECT
	DB	0EDH,4BH
	DW	?N
	ENDM
;
SDED	MACRO	?N	;;STORE DE DIRECT
	DB	0EDH,53H
	DW	?N
	ENDM
;
SBCD	MACRO	?N	;;STORE BC DIRECT
	DB	0EDH,43H
	DW	?N
	ENDM
;
; END OF Z80 MACRO EXTENSIONS
;

@SYS	SET	0
@KEY	SET	1
@CON	SET	2
@RDR	SET	3
@PUN	SET	4
@LST	SET	5
@DIO	SET	6
@RIO	SET	7
@SIO	SET	8
@MSG	SET	9
@INP	SET	10
@RDY	SET	11
@VER	SET	12
@LOG	SET	13
@DSK	SET	14
@OPN	SET	15
@CLS	SET	16
@DIR	SET	17
@NXT	SET	18
@DEL	SET	19
@FRD	SET	20
@FWR	SET	21
@MAK	SET	22
@REN	SET	23
@CUR	SET	25
@DMA	SET	26
@CHG	SET	30
@USR	SET	32
@RRD	SET	33
@RWR	SET	34
@SIZ	SET	35
@REC	SET	36
@LOGV	SET	37	;2.2 only
@RWR0	SET	40	;2.2 only
;
CPMBASE EQU	0
BOOT	SET	CPMBASE
BDOS	SET	BOOT+5
TFCB	EQU	BOOT+5CH
TFCB1	EQU	TFCB
TFCB2	EQU	TFCB+16
TBUFF	EQU	BOOT+80H
TPA	EQU	BOOT+100H
CTRL	EQU	' '-1		;Ctrl char mask
CR	SET	CTRL AND 'M'
LF	SET	CTRL AND 'J'
TAB	SET	CTRL AND 'I'
FF	SET	CTRL AND 'L'
BS	SET	CTRL AND 'H'
FALSE	SET	0
TRUE	SET	NOT FALSE
;
CPM	MACRO	FUNC,OPERAND,CONDTN
	LOCAL	PAST
	IF	NOT NUL CONDTN
	DB	( J&CONDTN ) XOR 8
	DW	PAST
	ENDIF		;;of not nul condtn
	IF	NOT NUL OPERAND
	LXI	D,OPERAND
	ENDIF		;;of not nul operand
	IF	NOT NUL FUNC
	MVI	C,@&FUNC
	ENDIF
	CALL	BDOS
PAST:
	ENDM
;
BLKMOV	MACRO	DEST,SRCE,LEN,COND
	LOCAL	PAST
	JMP	PAST
@BMVSBR:
	MOV	A,B
	ORA	C
	RZ
	DCX	B
	MOV	A,M
	INX	H
	STAX	D
	INX	D
	JMP	@BMVSBR
BLKMOV	MACRO	DST,SRC,LN,CC
	LOCAL	PST
	IF	NOT NUL CC
	DB	( J&CC ) XOR 8
	DW	PST
	ENDIF
	IF	NOT NUL DST
	LXI	D,DST
	ENDIF
	IF	NOT NUL SRC
	LXI	H,SRC
	ENDIF
	IF	NOT NUL LN
	LXI	B,LN
	ENDIF
	CALL	@BMVSBR
	IF	NOT NUL CC
PST:
	ENDIF
	ENDM
PAST:	BLKMOV	DEST,SRCE,LEN,COND
	ENDM

;
OVERLAY SET	0
; Macro Definitions
;
RTAG	MACRO	LBL
??R&LBL EQU	$+2-@BASE
	ENDM
;
RGRND	MACRO	LBL
??R&LBL EQU	0FFFFH
	ENDM
;
R	MACRO	INST
@RLBL	SET	@RLBL+1
	RTAG	%@RLBL
	INST-@BASE
	ENDM
;
NXTRLD	MACRO	NN
@RLD	SET	??R&NN
@NXTRLD SET	@NXTRLD + 1
	ENDM
;
;
; Enter here from Console Command Processor (CCP)
;
	ORG	TPA
CCPIN:
;
;  Branch to Start of Program
;
	jmp	start

;
;******************************************************************
;
;  SINSFORM -- ZCPR2 Utility Standard General Purpose Initialization Format
;
;	This data block precisely defines the data format for
; initial features of a ZCPR2 system which are required for proper
; initialization of the ZCPR2-Specific Routines in SYSLIB.
;

;
;  EXTERNAL PATH DATA
;
EPAVAIL:
	DB	0FFH	; IS EXTERNAL PATH AVAILABLE? (0=NO, 0FFH=YES)
EPADR:
	DW	40H	; ADDRESS OF EXTERNAL PATH IF AVAILABLE

;
;  INTERNAL PATH DATA
;
INTPATH:
	DB	0,0	; DISK, USER FOR FIRST PATH ELEMENT
			; DISK = 1 FOR A, '$' FOR CURRENT
			; USER = NUMBER, '$' FOR CURRENT
	DB	0,0
	DB	0,0
	DB	0,0
	DB	0,0
	DB	0,0
	DB	0,0
	DB	0,0	; DISK, USER FOR 8TH PATH ELEMENT
	DB	0	; END OF PATH

;
;  MULTIPLE COMMAND LINE BUFFER DATA
;
MCAVAIL:
	DB	0FFH	; IS MULTIPLE COMMAND LINE BUFFER AVAILABLE?
MCADR:
	DW	0F900H	; ADDRESS OF MULTIPLE COMMAND LINE BUFFER IF AVAILABLE

;
;  DISK/USER LIMITS
;
MDISK:
	DB	4	; MAXIMUM NUMBER OF DISKS
MUSER:
	DB	15	; MAXIMUM USER NUMBER

;
;  FLAGS TO PERMIT LOG IN FOR DIFFERENT USER AREA OR DISK
;
DOK:
	DB	0FFH	; ALLOW DISK CHANGE? (0=NO, 0FFH=YES)
UOK:
	DB	0FFH	; ALLOW USER CHANGE? (0=NO, 0FFH=YES)

;
;  PRIVILEGED USER DATA
;
PUSER:
	DB	15	; BEGINNING OF PRIVILEGED USER AREAS
PPASS:
	DB	'SYSTEM',0	; PASSWORD FOR MOVING INTO PRIV USER AREAS
	DS	41-($-PPASS)	; 40 CHARS MAX IN BUFFER + 1 for ending NULL

;
;  CURRENT USER/DISK INDICATOR
;
CINDIC:
	DB	'$'	; USUAL VALUE (FOR PATH EXPRESSIONS)

;
;  DMA ADDRESS FOR DISK TRANSFERS
;
DMADR:
	DW	80H	; TBUFF AREA

;
;  NAMED DIRECTORY INFORMATION
;
NDRADR:
	DW	0F800H	; ADDRESS OF MEMORY-RESIDENT NAMED DIRECTORY
NDNAMES:
	DB	14	; MAX NUMBER OF DIRECTORY NAMES
DNFILE:
	DB	'SYS     '	; NAME OF DISK NAME FILE
	DB	'NDR'		; TYPE OF DISK NAME FILE

;
;  REQUIREMENTS FLAGS
;
EPREQD:
	DB	0FFH	; EXTERNAL PATH?
MCREQD:
	DB	0FFH	; MULTIPLE COMMAND LINE?
MXREQD:
	DB	000H	; MAX USER/DISK?
UDREQD:
	DB	0FFH	; ALLOW USER/DISK CHANGE?
PUREQD:
	DB	000H	; PRIVILEGED USER?
CDREQD:
	DB	0FFH	; CURRENT INDIC AND DMA?
NDREQD:
	DB	0FFH	; NAMED DIRECTORIES?
Z3CLASS:
	DB	5	; CLASS 5
	DB	'ZCPR3'
	DS	10	; RESERVED
;
WHEEL	EQU	04BH	;ZCPR3 WHEEL BYTE LOCATION


;
;  END OF SINSFORM -- STANDARD DEFAULT PARAMETER DATA
;
;******************************************************************
;
DFLTNAM:
	DB	'COMMAND ' ; <---change this if you like---
LBRLIT:
	DB	'LBR'
;
SIGNON:
	DB	'LRUNZ  Version '	;Signon message
	DB	VERSION/10+'0'
	DB	'.'
	DB	VERSION MOD 10+'0'
	DB	CR,LF
	DB	'$',CTRL AND 'Z'
	DB	' Copyright (c) 1982  Gary P. Novosielski '
	DB	CR,LF
	DB	' Modified for Use Under ZCPR2 by Richard Conn'
	DB	'$',CTRL AND 'Z'
;
;
;  START OF PROGRAM
;
START: 
	LDA	WHEEL		;load wheel byte
	MVI	E,9
	CMP	E		;binary subtract
	JC	MSGA		;jump to abort message if carry flag set
	JMP	START1		;jump to lrunz if not aborted
MSG:	
	DB	'Wheel Byte Not Set ==> Aborting $'
MSGA:	
	MVI	C,09H		;bdos print function
	LXI	D,MSG		;pointer to abort message
	CALL	05H		;do it
	JMP	0000H		;warm boot if aborted
START1: 		
	LXI	H,0		;get the CCP entry stackpointer
	DAD	SP		;(used only if HELP request
	SHLD	SPSAVE		; is encountered)
	CPM	MSG,SIGNON;	;Display signon
	CALL	SETUP		;initialize.
	LHLD	BDOS+1		;find top of memory
	MOV	A,H		;page address
				;Form destination...
	SUI	PAGES	 	;...address in
	MOV	D,A		;DE pair.
	MVI	E,0
	PUSH	D		;save on stack
;
	BLKMOV	,@BASE,SEGLEN	;Move the active segment.
;
;The segment is now moved to high memory, but not
;properly relocated.  The bit table which specifies
;which addresses need to be adjusted is located
;just after the last byte of the source segment,
;so (HL) is now pointing at it.
	POP	D	;beginning of newly moved code.
	LXI	B,SEGLEN;length of segment
	PUSH	H	;save pointer to reloc info
	MOV	H,D	;offset page address
;
;Scan through the newly moved code, and adjust any
;page addresses by adding (H) to them.	The word on
;top of the stack points to the next byte of the
;relocation bit table.	Each bit in the table
;corresponds to one byte in the destination code.
;A value of 1 indicates the byte is to be adjusted.
;A value of 0 indicates the byte is to be unchanged.
;
;Thus one byte of relocation information serves to
;mark 8 bytes of object code.  The bits which have
;not been used yet are saved in L until all 8
;are used.
;
FIXLOOP:
	MOV	A,B
	ORA	C		;test if finished
	JRZ	FIXDONE
	DCX	B		;count down
	MOV	A,E
	ANI	07H		;on 8-byte boundry?
	JRNZ	NEXTBIT
;
NEXTBYT:
;Get another byte of relocation bits
	XTHL
	MOV	A,M
	INX	H
	XTHL
	MOV	L,A		;save in register L
;
NEXTBIT:
	MOV	A,L		;remaining bits from L
	RAL			;next bit to CARRY
	MOV	L,A		;save the rest
	JRNC	NEXTADR
;
;CARRY was = 1.  Fix this byte.
	LDAX	D
	ADD	H		;(H) is the page offset
	STAX	D
;
NEXTADR:
	INX	D
	JR	FIXLOOP
;
;Finished.  Jump to the first address in the new
;segment in high memory.
;
;First adjust the stack.  One garbage word was
;left by fixloop.
;
FIXDONE:
	INX	SP
	INX	SP
;
;(HL) still has the page address
;
	MOV	L,A	;move zero to l
;
;  Set User/Disk for Return
;
	LDA	CDISK	;Set Disk
	MOV	B,A
	LDA	CUSER	;Set User
	MOV	C,A
	PCHL		;Stack is valid
;
;Any one-shot initialization code goes here.
;
SETUP:
	LXI	H,NOLOAD
	SHLD	CCPIN+1 	;Prevent reentry
;
	CALL	REPARS		;Re-parse command line
;
	LXI	D,MEMBER+9	;Check member filetype
	LDAX	D
	CPI	' '		;If blank,
	BLKMOV	,COMLIT,3,Z	; default to COM.
;
	LXI	D,LBRFIL+9	;Check library filetype
	LDAX	D
	CPI	' '		;If blank,
	BLKMOV	,LBRLIT,3,Z	; default to LBR
;
	LXI	D,LBRFIL+1	;Check name
	LDAX	D
	CPI	' '		;If blank,
	BLKMOV	,DFLTNAM,8,Z	; use default name.
;
;  Set Current Disk and User and then Search Along ZCPR2 Path for
;    the Library File
;
	CPM	CUR		;Get Current Disk
	STA	CDISK		;Save It
	CPM	USR,0FFH	;Get Current User
	STA	CUSER		;Save It
	CPM	OPN,LBRFIL	;Try to Open Library File Now
	INR	A		;Zero Means Not Found
	JRNZ	DIROK		;Process if Found
	XRA	A		;Set to Select Current Disk
	STA	LBRFIL
	LXI	H,INTPATH	;Point to Internal Path
	LDA	EPAVAIL		;External Path Available?
	ORA	A		;Zero = No
	JRZ	INPATH
	LHLD	EPADR		;Get Address of External Path
INPATH:
	MOV	A,M		;Get Drive
	ORA	A		;0=Command Not Found
	JZ	NODIR		;Not Found
	ANI	7FH		;Mask MSB
	MOV	B,A		;Save in B for a While
	LDA	CINDIC		;Get Current Indicator
	CMP	B		;Compare for Current
	JRNZ	INPATH1		;Good Disk In B
	LDA	CDISK		;Get Current Disk
	INR	A		;Add 1 to be good
	MOV	B,A		;Disk In B
INPATH1:
	DCR	B		;Disk in Range 0-15
	INX	H		;Pt to User Number
	MOV	A,M		;Get User Number
	INX	H		;Pt to Next Disk
	PUSH	H		;Save Ptr
	ANI	7FH		;Mask User Number
	MOV	C,A		;User in C for now
	LDA	CINDIC		;Compare to Current Indicator
	CMP	C		;See if Current User
	JRNZ	INPATH2		;Good User In C
	LDA	CUSER		;User Current User
	MOV	C,A		;User in C
INPATH2:
	MOV	E,B		;Select Disk
	PUSH	B		;Save User in C
	CPM	DSK		;Set Disk
	POP	D		;Get User in E
	CPM	USR		;Set User
	CPM	DIR,LBRFIL	;See if File Exists in this Directory
	POP	H		;Restore Path Pointer
	INR	A		;Error Code (Not Found) is Zero
	JRZ	INPATH		;Continue Thru Path
DIROPN:
	CPM	OPN,LBRFIL	;Open for directory read.
DIROK:
	CPM	DMA,TBUFF	;Set DMA for Block Read
FINDMBR:
	CPM	FRD,LBRFIL	;Read the directory
	ORA	A
	JNZ	FISHY		;Empty file, Give up.
	LXI	H,TBUFF
	MOV	A,M
	ORA	A
	JNZ	FISHY		;Directory not active??
	MVI	B,8+3		;Check for blanks
	MVI	A,' '
VALIDLOOP:
	INX	H
	CMP	M
	JNZ	FISHY
	DCR	B
	JRNZ	VALIDLOOP
;
	LHLD	TBUFF+1+8+3	;Index must be 0000
	MOV	A,H
	ORA	L
	JNZ	FISHY
;
	LHLD	TBUFF+1+8+3+2	;Get directory size
	DCX	H		;We already read one.
	PUSH	H		;Save on stack
	JR	FINDMBRN	;Jump into loop
FINDMBRL:
	POP	H		;Read sector count from TOS
	MOV	A,H
	ORA	L		;0 ?
	JZ	NOMEMB		;Member not found in library
	DCX	H		;Count down
	PUSH	H		;and put it back.
	CPM	FRD,LBRFIL	;Get next directory sector
	ORA	A
	JNZ	FISHY


FINDMBRN:
	LXI	H,TBUFF   	;Point to buffer.
	MVI	C,128/32	;Number of directory entries
;
FINDMBR1:
	CALL	COMPARE 	;Check if found yet.
	JZ	GETLOC		;Found member in .DIR
	DCR	C
	JRZ	FINDMBRL
;
	LXI	D,32		;No match, point to next one.
	DAD	D
	JR	FINDMBR1
;
GETLOC: 	;The name was found now get index and length
	POP	B	;Clear stack garbage
	XCHG		;Pointer to sector address.
	MOV	E,M	;Get First
	INX	H
	MOV	D,M
	XCHG
	SHLD	INDEX	;Save it
	XCHG
	INX	H	;Get Size to DE
	MOV	E,M
	INX	H
	MOV	D,M
	XCHG		; Size to HL
	SHLD	LENX
	CALL	PACKUP	;Repack command line arguments
	CPM	CON,CR	;do <cr> only (look like CCP)
	RET
;		End of setup.
;
;	Utility subroutines
NEGDE:			;DE = -DE
	MOV	A,D
	CMA
	MOV	D,A
;
	MOV	A,E
	CMA
	MOV	E,A
	INX	D
	RET
;
;	REPARSE re-parses the fcbs from the command line,
;	to allow the "-" character to prefix the library name
;
REPARS:
	LXI	D,MEMBER	;first reinitialize both fcbs
	CALL	NITF
	LXI	D,LBRFIL
	CALL	NITF
	LXI	H,TBUFF 	;store a null at the end of
	MOV	E,M		; the command line (this is
	MVI	D,0		; done by CP/M usually, except
	XCHG			; in the case of a full com-
	DAD	D		; mand line
	INX	H
	MVI	M,0
	XCHG			;tbuff pointer back in hl
SCANBK:
	INX	H		;bump to next char position
	MOV	A,M		;fetch next char
	ORA	A		;reached a null? (no arguments)
	JZ	HELP		;interpret as a call for help
	CPI	' '		;not null, skip blanks
	JRZ	SCANBK
	CPI	'-'		;library name specifier?
	JRNZ	NOTLBR		;skip if not
	INX	H		;it is, skip over flag character
	LXI	D,LBRFIL	;parse library name into FCB
	CALL	GETFN
NOTLBR:
	LXI	D,MEMBER	;now parse the command name
	CALL	GETFN
	LXI	D,HOLD+1	;pnt to temp storage for rest of cmd line
	MVI	B,-1		;init a counter
CLSAVE:
	INR	B		;bump up counter
	MOV	A,M		;fetch a char
	STAX	D		;move it to hold area
	INX	H		;bump pointers
	INX	D
	ORA	A		;test whether char was a terminator
	JRNZ	CLSAVE		;continue moving line if not
	MOV	A,B		;it was, get count
	STA	HOLD		;save it in hold area
	RET
;
;	PACKUP retrieves the command line stored at
;	HOLD and moves it back to tbuff, then reparses
;	the default file control blocks so the command
;	will never know it was run from a library
;
PACKUP:
	LXI	H,HOLD		;point to length byte of HOLD
	MOV	C,M		;get length in BC
	MVI	B,0
	INX	B		;bump up to because length byte doesn't
	INX	B		;  include itself or null terminator
	BLKMOV	TBUFF		;moving everybody to Tbuff
	LXI	H,TBUFF+1	;point to the command tail
	LXI	D,TFCB1 	;first parse out tfcb1
	CALL	GETFN
	LXI	D,TFCB2 	;then tfcb2
	CALL	GETFN
	RET
;
;	Here when HELP is requested (indicated
;	by LRUN with no arguments)
;
HELP:
	CPM	MSG,HLPMSG	;print the HELP message
EXIT:
	LHLD	SPSAVE		;find CCP re-entry adrs
	SPHL			;fix & return
	RET
;
;	the HELP message
;
HLPMSG:
	DB	CR,LF,'Correct syntax is:'
	DB	CR,LF
	DB	LF,TAB,'LRUN [-<lbrname>] <command line>'
	DB	CR,LF
	DB	LF,'Where <lbrname> is the optional library name'
	DB	CR,LF,'(Note the preceding "-".  ) If omitted,'
	DB	CR,LF,'the default command library is used.'
	DB	LF
	DB	CR,LF,'<command line> is the name and parameters'
	DB	CR,LF,'of the command being run from the library,'
	DB	CR,LF,'just as if a separate .COM file were being run.'
	DB	CR,LF,'$'
;
;
COMPARE:		;Test status, name and type of
	PUSH	H		;a directory entry.
	MVI	B,1+8+3
	XCHG			;with the one we're
	LXI	H,MEMBER	;looking for.
COMPAR1:
	LDAX	D
	CMP	M
	JRNZ	COMPEXIT
	INX	D
	INX	H
	DCR	B
	JRNZ	COMPAR1
COMPEXIT:			;Return with DE pointing to
	POP	H		;last match + 1, and HL still
	RET			;pointing to beginning.
;
;
;	File name parsing subroutines
;
; getfn gets a file name from text pointed to by reg hl into
; an fcb pointed to by reg de.	leading delimeters are 
; ignored.
; entry hl	first character to be scanned
;	de	first byte of fcb
; exit	hl	character following file name
;
;
;
GETFN:
	CALL	NITF	;init 1st half of fcb
	CALL	GSTART	;scan to first character of name
	RZ		;end of line was found - leave fcb blank
	CALL	GETDRV	;get drive spec. if present
	CALL	GETPS	;get primary and secondary name
	RET


;
; nitf fills the fcb with dflt info - 0 in drive field
; all-blank in name field, and 0 in ex,s1,s2 and rc flds
;
NITF:
	PUSH	D	;save fcb loc
	XCHG		;move it to hl
	MVI	M,0	;zap dr field
	INX	H	;bump to name field
	MVI	B,11	;zap all of name fld
NITLP1:
	MVI	M,' '
	INX	H
	DJNZ	NITLP1
	MVI	B,4	;zero others
NITLP2:
	MVI	M,0
	INX	H
	DJNZ	NITLP2
	XCHG		;restore hl
	POP	D	;restore fcb pointer
	RET
;
; gstart advances the text pointer (reg hl) to the first
; non delimiter character (i.e. ignores blanks).  returns a
; flag if end of line (00h or ';') is found while scaning.
; exit	hl	pointing to first non delimiter
;	a	clobbered
;	zero	set if end of line was found
;
GSTART:
	CALL	GETCH	;see if pointing to delim?
	RNZ		;nope - return
	CPI	';'	;end of line?
	RZ		;yup - return w/flag
	ORA	A
	RZ		;yup - return w/flag
	INX	H	;nope - move over it
	JR	GSTART	;and try next char
;
; getdrv checks for the presence of a drive spec at the text
; pointer, and if present formats it into the fcb and
; advances the text pointer over it.
; entry hl	text pointer
;	de	pointer to first byte of fcb
; exit	hl	possibly updated text pointer
;	de	pointer to second (primary name) byte of fcb
;
GETDRV:
	INX	D	;point to name if spec not found
	INX	H	;look ahead to see if ':' present
	MOV	A,M
	DCX	H	;put back in case not present
	CPI	':'	;is a drive spec present?
	RNZ		;nope - return
	MOV	A,M	;yup - get the ascii drive name
	SUI	'A'-1	;convert to fcb drive spec
	DCX	D	;point back to drive spec byte
	STAX	D	;store spec into fcb
	INX	D	;point back to name
	INX	H	;skip over drive name
	INX	H	;and over ':'
	RET
;
; getps gets the primary and secondary names into the fcb.
; entry hl	text pointer
; exit	hl	character following secondary name (if present)
;
GETPS:
	MVI	C,8	;max length of primary name
	CALL	GETNAM	;pack primary name into fcb
	MOV	A,M	;see if terminated by a period
	CPI	'.'
	RNZ		;nope - secondary name not given
			;return default (blanks)
	INX	H	;yup - move text pointer over period
FTPOINT:
	MOV	A,C	;yup - update fcb pointer to secondary
	ORA	A
	JRZ	GETFT
	INX	D
	DCR	C
	JR	FTPOINT
GETFT:
	MVI	C,3	;max length of secondary name
	CALL	GETNAM	;pack secondary name into fcb
	RET
;
; getnam copies a name from the text pointer into the fcb for
; a given maximum length or until a delimiter is found, which
; ever occurs first.  if more than the maximum number of
; characters is present, characters are ignored until a
; a delimiter is found.
; entry hl	first character of name to be scaned
;	de	pointer into fcb name field
;	c	maximum length
; exit	hl	pointing to terminating delimiter
;	de	next empty byte in fcb name field
;	c	max length - number of characters transfered
;
GETNAM:
	CALL	GETCH	;are we pointing to a delimiter yet?
	RZ		;if so, name is transfered
	INX	H	;if not, move over character
	CPI	'*'	;ambigious file reference?
	JRZ	AMBIG	;if so, fill the rest of field with '?'
	STAX	D	;if not, just copy into name field
	INX	D	;increment name field pointer
	DCR	C	;if name field full?
	JRNZ	GETNAM	;nope - keep filling
	JR	GETDEL	;yup - ignore until delimiter
AMBIG:
	MVI	A,'?'	;fill character for wild card match
QFILL:
	STAX	D	;fill until field is full
	INX	D
	DCR	C
	JRNZ	QFILL	;fall thru to ingore rest of name
GETDEL:
	CALL	GETCH	;pointing to a delimiter?
	RZ		;yup - all done
	INX	H	;nope - ignore antoher one
	JR	GETDEL
;
; getch gets the character pointed to by the text pointer
; and sets the zero flag if it is a delimiter.
; entry hl	text pointer
; exit	hl	preserved
;	a	character at text pointer
;	z	set if a delimiter
;
GETCH:
	MOV	A,M	;get the character
	CPI	'.'
	RZ
	CPI	','
	RZ	  
	CPI	';'
	RZ
	CPI	' '
	RZ
	CPI	':'
	RZ
	CPI	'='
	RZ
	CPI	'<'
	RZ
	CPI	'>'
	RZ
	ORA	A	;Set zero flag on end of text
	RET
;
;
; Error routines:
;
NODIR:
	CALL	ABEND
	DB	'Library not found'
	DB	'$'
FISHY:
	CALL	ABEND
	DB	'Name after "-" isn''t a library'
	DB	'$'
NOMEMB:
	LXI	H,MEMBER+1	;Pt to first char of Command Name
	MVI	B,8		;Print 8 Chars
NOMEMBL:
	MOV	E,M		;Print Char
	INX	H		;Pt to Next
	PUSH	H		;Save Ptr and Count
	PUSH	B
	CPM	CON
	POP	B
	POP	H
	DJNZ	NOMEMBL
	CALL	ABEND1		;No Initial New Line
	DB	' -- Command not in directory'
	DB	'$'
NOLOAD:
	CALL	ABEND
	DB	'No program in memory'
	DB	'$'
NOFIT:
	POP	B	;Clear Stack
	CALL	ABEND
	DB	'Program too large to load'
	DB	'$'
;
COMLIT:
	DB	'COM'
;
ABEND:
	CPM	MSG,NEWLIN
ABEND1:
	POP	D
	CPM	MSG
	CPM	DEL,SUBFILE
	CPM	MSG,ABTMSG
	JMP	EXIT
ABTMSG:
	DB	' -- Aborting$'
NEWLIN:
	DB	CR,LF,'$'
CDISK:
	DS	1	;CURRENT DISK BUFFER
CUSER:
	DS	1	;CURRENT USER BUFFER
SPSAVE:
	DS	2		;stack pointer save
;
	PAGE
;Adjust location counter to next 256-byte boundry
@BASE	ORG	($ + 0FFH) AND 0FF00H
@RLBL	SET	0
;
; The segment to be relocated goes here.
; Any position dependent (3-byte) instructions
; are handled by the "R" macro.
;*************************************************
;
	PUSH	B	;Save Original User/Disk
 R	<LHLD	LENX>	;Get length of .COM member to load.
	MVI	A,TPA/128
	ADD	L	;Calculate highest address
	MOV	L,A	;To see if it will fit in
	ADC	H	;available memory
	SUB	L
	MOV	H,A
	REPT	7
	DAD	H
	ENDM
	XCHG	
	CALL	NEGDE	;IT'S STILL IN LOW MEMORY
 R	<LXI	H,PROTECT>
	DAD	D
	JNC	NOFIT	;Haven't overwritten it yet.
;
; The library file is still open.  The open FCB has been
; moved up here into high memory with the loader code.
;
LBROPN:
 R	<LHLD	INDEX>		;Set up for random reads
 R	<SHLD	RANDOM>
	XRA	A
 R	<STA	RANDOM+2>
;
	LXI	H,TPA
 R	<SHLD	LOADDR>

;
; This high memory address and above, including CCP, must be
; protected from being overlaid by loaded program
;
PROTECT:
;
LOADLOOP:			;Load that sucker.
 R	<LHLD	LENX>		;See if done yet.
	MOV	A,L
	ORA	H
	JRZ	LOADED
	DCX	H
 R	<SHLD	LENX>
;
 R	<LHLD	LOADDR> 	;Increment for next time
	MOV	D,H
	MOV	E,L
	LXI	B,80H
	DAD	B
 R	<SHLD	LOADDR>
	CPM	DMA		;but use old value (DE)
;
 R	<LXI	D,LBRFIL>
	CPM	RRD		;Read the sector
	ORA	A		;Ok?
	JRNZ	ERR		;No, bail out.
;
 R	<LHLD	RANDOM> 	;Increment random record field
	INX	H
 R	<SHLD	RANDOM>
;
	JR	LOADLOOP	;Until done.
;
ERR:
	MVI	A,( JMP )	;Prevent execution of bad code
	STA	TPA
	LXI	H,BOOT
	SHLD	TPA+1
;
 R	<LXI	D,LDMSG>
	CPM	MSG
 R	<LXI	D,SUBFILE>	;Abort SUBMIT if in progress
	CPM	DEL
LOADED:
	CPM	DMA,TBUFF	;Restore DMA adrs for user pgm
	CPM	CON,LF		;Turn up a new line on console
	POP	B		;Restore Current User/Disk
	PUSH	B		;Save it again
	MOV	E,B		;Restore Disk
	CPM	DSK		;Log In Disk
	POP	D		;E=USER
	CPM	USR		;Log In User
	JMP	TPA
;
LDMSG:
	DB	CR,LF,'Bad Load$'
INDEX:
	DW	0
LENX:
	DW	0
SUBFILE:
	DB	1,'$$$     SUB',0,0,0,0
	;If used, this FCB will clobber the following one.
	;but it's only used on a fatal error, anyway.
LBRFIL:
	DS	32		;Name placed here at setup
	DB	0		;Normal FCB plus...
OVERLAY SET	$		;(Nothing past here but DS's)
RANDOM:
	DS	3		;...Random access bytes
MAXMEM:
	DS	2
LOADDR:
	DS	2
;*************************************************
;End of segment to be relocated.
	IF	OVERLAY EQ 0
OVERLAY SET	$
	ENDIF
;
PAGES	EQU	($-@BASE+0FFH)/256+8
;
SEGLEN	EQU	OVERLAY-@BASE
	ORG	@BASE+SEGLEN
	PAGE
;	Build the relocation information into a
; bit table immediately following.
;
@X	SET	0
@BITCNT SET	0
@RLD	SET	??R1
@NXTRLD SET	2
	RGRND	%@RLBL+1	;define one more label
;
	REPT	SEGLEN+8
	IF	@BITCNT>@RLD
	NXTRLD	%@NXTRLD	;next value
	ENDIF
	IF	@BITCNT=@RLD
@X	SET	@X OR 1 	;mark a bit
	ENDIF
@BITCNT SET	@BITCNT + 1
	IF	@BITCNT MOD 8 = 0
	DB	@X
@X	SET	0	;clear hold variable for more
	ELSE
@X	SET	@X SHL 1	;not 8 yet. move over.
	ENDIF
	ENDM
;
	DB	0
HOLD:
	DB	0,0		;0 length, null terminator
	DS	128-2		;rest of HOLD area
MEMBER:
	DS	16
;
	END	CCPIN