; Module:	NZFCP.LIB
; Author:	Carson Wilson
; Version:	1.3
; Date:		9 Oct 89
; Changes:	Prompts for options if SLR true.

; This module is a set of configuration options for the flow control package
; code in NZFCP.Z80.  The options are not fully commented here; see
; "ZCPR3, The Manual" for a detailed discussion of most of them.


;             * * * * * *     N O T I C E     * * * * * *
;
; The main code in Z33FCP.Z80 has been written with relative jump instructions
; for minimum code size.  If the options below are changed, then some of the
; jumps may become out-of-range.  You will then have to change the code based
; on the error messages you get from your assembler.  I cannot think of any
; way to handle the jumps automatically (macros fail because the jump distances
; cannot be resolved fully even in two passes of the assembler).  If you want
; to play things really safe, you can do a global search and replace to change
; all occurrences of the JR instruction to JP (but note that this change is
; irreversible).  I prefer to live with this nuisance so that I can get the
; most out of the code.
;
; Another possible way to clear up a problem with a relative jump that is out
; of range is to take the block of code with the labels IFCTRUE and IFCFALSE
; and move it up or down in the code.  It is placed somewhere in the middle of
; the resident options, so that the options can reach those entry points with
; a relative jump.  You should try to place that code near the middle of the
; options which you have enabled.
;
;			Jay Sage (May 17, 1987)

;=============================================================================
;
;	M A C R O S
;
;=============================================================================

; SLR assemblers allow selection of options during assembly.

SLR	equ	yes

	 if SLR

y 	equ	yes
n 	equ	no	

select	macro	option default comment
	.accept	comment,option		; Prompt user for selection
	endm

	.printx
	.printx	Answer "Y" to include, "N" to exclude commands:
	.printx

	 else

select	macro	option default comment
option	equ	default			; Use selections from file
	endm
	 endif				; SLR

; -------------------------------------------------------------------------

; Command names

; The CTABLE macro, which constructs the command dispatch table, includes a
; line for each command, the first parameter of which is the name of the
; command.  These names may be changed if you wish.  But make sure that you
; do not use a name that is longer than the maximum allowed length.  If you
; do, the name will be truncated and a nonfatal error will occur during
; assembly.  DO NOT CHANGE ANY PARAMETER OTHER THAN THE COMMAND NAME.  Lower
; case letters will be converted to upper case.  The macro COMMAND is defined
; in Z34MAC.LIB.

cmdsize	equ	4		; Maximum length of command names

; Command table		name,	enable,	wheel,	jump_addr
			;	[ DO NOT CHANGE THESE PARAMETERS ]
ctable	macro
ifcmd:	command		if,	yes,	no,	ifstart
	command		and,	andopt,	no,	andstart
	command		or,	oropt,	no,	orstart
	command		else,	yes,	no,	ifelse
	command		fi,	yes,	no,	ifend
	command		ifq,	ifqopt,	no,	ifstat0
	command		xif,	yes,	no,	ifexit
	command		zif,	zifopt,	no,	ifzero
	endm

;-----------------------------------------------------------------------------

; General configuration options

NOISE	equ	no	; Don't display if-state messages

select	COMIF	no	'Enable transient IF processing?        '

PATHROOT equ	yes	; Find transient IF in root of path

ifdrv		equ	'A'		; Drive to use if PATHROOT is off or
					; ..if the path is empty
ifusr		equ	0		; User to use if PATHROOT is off or
					; ..if the path is empty

; ---------------------------------------------------------------------

; Command inclusion options

select	ZIFOPT	yes	'ZIF - unconditionally clear IF states? '
select	IFQOPT	yes	'IFQ - show current if status?          '
select	OROPT	yes	'OR  - set state at current level?      '
select	ANDOPT	yes	'AND - reset state at current level?    '

;-----------------------------------------------------------------------------

; If Condition Options

	 if COMIF	; Different precedence if transient IF available.
select	IFONEG	yes	'Allow negation of conditions?          '
negchar		equ	'~'	; Character to use if negation allowed
select	IFOERROR yes	'ERROR - test program error flag?       '
select	IFONULL	yes	'NULL  - test for no file name?         '
select	IFOREG	yes	'REG   - test register values?          '
select	IFAMBIG	yes	'AMBIG - test for "?" in file spec?     '
select	IFCOMPR	yes	'COMPR - test for compressed filespec?  '
select	IFOEQ	yes	'=     - test tokens for equality?      '
select	IFOINPUT yes	'INPUT - test user input?               '
XEQOPT	equ	yes	; Test only first token for equal sign
select	IFOTRUE	yes	'Allow "IF T" and "IF F" forms?         '
select	IFOWHEEL no	'WHEEL - test wheel byte?               '
select	IFOTCAP	no	'TCAP  - test whether TCAP loaded?      '
select	IFOEXIST yes	'EXIST - test for file existence?       '
select	IFOEMPTY yes	'EMPTY - test files for contents?       '
	 else
select	IFONEG	yes	'Allow negation of conditions?          '
negchar		equ	'~'	; Character to use if negation allowed
select	IFONULL	yes	'NULL  - test for no file name?         '
select	IFOINPUT yes	'INPUT - test user input?               '
select	IFOEQ	yes	'=     - test tokens for equality?      '
XEQOPT	equ	yes	; Test only first token for equal sign
select	IFOERROR yes	'ERROR - test program error flag?       '
select	IFOTRUE	yes	'Allow "IF T" and "IF F" forms?         '
select	IFOEXIST yes	'EXIST - test for file existence?       '
select	IFAMBIG	yes	'AMBIG - test for "?" in file spec?     '
select	IFCOMPR	yes	'COMPR - test for compressed filespec?  '
select	IFOREG	yes	'REG   - test register values?          '
select	IFOWHEEL no	'WHEEL - test wheel byte?               '
select	IFOTCAP	no	'TCAP  - test whether TCAP loaded?      '
select	IFOEMPTY yes	'EMPTY - test files for contents?       '
	 endif	; COMIF

; Miscellaneous configuration information

curusr		equ	z3msg+2eh	; Current logged user address
curdr		equ	z3msg+2fh	; Current logged drive address
curint		equ	'$'		; Path symbol for current drive/user

;  END of NZFCP.LIB