;
; Program: SHOW
; Author: Richard Conn
; Version: 1.0
; Date: 5 Mar 84
;
version	equ	10
z3env	SET	0f400h

;
;	The purpose of SHOW is to display various details about the ZCPR3
; System to the ZCPR3 user.  Details on the ZCPR3 Environment Descriptor,
; what facilities are available, and what the status of these facilities
; is are included.
;

;
; Basic Equates
;
fcb	equ	5ch
cr	equ	0dh
lf	equ	0ah
ctrlc	equ	'C'-'@'
ctrlr	equ	'R'-'@'

;
; External References
;
	ext	envptr
	ext	tinit,dinit				;from VLIB
	ext	z3vinit,cls,gotoxy,gxymsg,vprint,at	;from VLIB
	ext	getiop
	ext	retud,pfn1
	ext	getpath,dutdir,bbline,eval16
	ext	capine,cout,crlf,print,pstr,getmsg,padc,pafdc,phl4hc,pa2hc
	ext	shempty,shfull,getsh
	ext	geter1,geterc,puter1,puterc
	ext	getfcp,getrcp,getefcb
	ext	getndr
	ext	strtzex,stopzex

;
; Environment Definition
;
	if	z3env ne 0
;
; External ZCPR3 Environment Descriptor
;
	jmp	start
	db	'Z3ENV'	;This is a ZCPR3 Utility
	db	1	;External Environment Descriptor
z3eadr:
	dw	z3env
start:
	lhld	z3eadr	;pt to ZCPR3 environment
;
	else
;
; Internal ZCPR3 Environment Descriptor
;
	MACLIB	Z3BASE.LIB
	MACLIB	SYSENV.LIB
z3eadr:
	jmp	start
	SYSENV
start:
	lxi	h,z3eadr	;pt to ZCPR3 environment
	endif

;
; Start of Program -- Initialize ZCPR3 Environment
;
	call	z3vinit	;initialize the ZCPR3 Env and the VLIB Env
	shld	dumpstrt	;set beginning address of memory dump
	lda	fcb+1	;check for E option (error handler)
	cpi	' '	;no option, so proceed
	jz	show
	cpi	'E'	;install SHOW as error handler
	jz	errins
	call	print
	db	'SHOW  Version '
	db	(version/10)+'0','.',(version mod 10)+'0'
	db	cr,lf,'Syntax:'
	db	cr,lf,'  SHOW	<-- Invoke Normally'
	db	cr,lf,'  SHOW E	<-- Install as Error Handler'
	db	0
	ret
;
; Install SHOW as an error handler
;
errins:
	call	getefcb	;pt to name of command
	jnz	errins1
	lxi	h,showcmd-1	;pt to command line
errins1:
	inx	h	;pt to first char
	push	h	;save ptr
	lxi	d,8	;skip to file type field
	dad	d
	mvi	m,0	;store ending 0
	pop	h
	call	puterc	;store error handler command line
	mvi	a,0ffh	;turn on error handlers
	call	puter1
	call	print
	db	'SHOW Installed as an Error Handler',0
	ret
;
; Print Menu and Accept Command
;
show:
	call	tinit	;init terminal
	call	stopzex	;stop ZEX if running
	call	banner	;print banner
	call	gxymsg
	db	3,31
	db	'--> ',1,'SHOW Menu',2,' <--',0
	mvi	h,7	;begin on row 7
	mvi	l,10	;column 10
	shld	infoxy
	call	dispxy	;position for display
	call	vprint
	db	'      '
	db	  ' PACKAGE DATA       ',0
	call	dispxy	;position for display
	call	vprint
	db	' C -- '
	db	1,'Command Packages    ',2,0
	call	dispxy	;position for display
	call	vprint
	db	' I -- '
	db	1,'Input/Output Package',2,0
	call	dispxy	;position for display
	call	dispxy	;position for display
	call	vprint
	db	'      '
	db	  ' ENVIRONMENT        ',0
	call	dispxy	;position for display
	call	vprint
	db	' E -- '
	db	1,'Error Handler       ',2,0
	call	dispxy	;position for display
	call	vprint
	db	' M -- '
	db	1,'Memory Utility      ',2,0
	call	dispxy	;position for display
	call	vprint
	db	' N -- '
	db	1,'Named Directory     ',2,0
	call	dispxy	;position for display
	call	vprint
	db	' P -- '
	db	1,'Path Expression     ',2,0
	call	dispxy
	call	vprint
	db	' S -- '
	db	1,'Shell Stack         ',2,0
	mvi	h,7	; row 7
	mvi	l,40	; column 40
	shld	infoxy
	call	dispxy
	call	vprint
	db	'      '
	db	  'ZCPR3 SYSTEM DATA   ',0
	call	dispxy
	call	vprint
	db	' 1 -- '
	db	1,'Env Descriptor      ',2,0
	call	dispxy
	call	vprint
	db	' 2 -- '
	db	1,'Message Buffers     ',2,0
	call	dispxy
	call	vprint
	db	' 3 -- '
	db	1,'CRT and Printer Data',2,0
	call	dispxy
	call	vprint
	db	' 4 -- '
	db	1,'System File Defns   ',2,0
	call	dispxy
	call	dispxy
	call	dispxy
	call	vprint
	db	' X -- '
	db	1,'Exit',2,0
;
; Input Command from User
;
getcmd:
	call	gxymsg	;print prompt
	db	23,10,'SHOW Command? ',0
	call	capine	;get command
getcmd1:
	call	ctabscan	;scan for and process command
	call	print	;print error message
	db	7,0	;beep
	jmp	getcmd
;
; Print Banner
;
banner:
	call	cls	;clear screen
	call	gxymsg	;print banner message
	db	1,27	;row/col
	db	'>>>> '
	db	'SHOW Version '
	db	(version/10)+'0','.',(version mod 10)+'0'
	db	' <<<<',0
	ret
;
; Command Table
;
ctable:
	db	'1'	;Env Desc
	dw	envdes
	db	'2'	;Messages
	dw	msg
	db	'3'	;CRT and Printer
	dw	cpdata
	db	'4'	;File Names
	dw	fnames
	db	'C'	;Command Package Status
	dw	command
	db	'E'	;Error Handler Display
	dw	errorh
	db	'I'	;I/O Package Display
	dw	iopack
	db	'M'	;Memory Utility
	dw	memory
	db	'N'	;Named Directory Data
	dw	namedir
	db	'P'	;Path Display
	dw	pdisp
	db	'S'	;Shell Stack Display
	dw	shstack
	db	'X'	;Exit
	dw	exit
	db	ctrlc	;Exit
	dw	exit
	db	cr	;New Screen
	dw	show
	db	' '	;New Screen
	dw	show
	db	ctrlr	;New Screen
	dw	show
	db	0	;end of table
;
; Scan for and transfer control to command routine
;
ctabscan:
	lxi	h,ctable	;pt to command table
	mov	c,a		;command in C
ctab1:
	mov	a,m		;get char from table
	ora	a		;done?
	rz
	cmp	c		;check for match
	jz	ctab2
	inx	h		;skip address
	inx	h
	inx	h		;pt to next command char
	jmp	ctab1
ctab2:
	inx	h		;pt to address
	mov	a,m		;get low
	inx	h
	mov	h,m		;get high
	mov	l,a		;HL pts to command
	pop	psw		;clear stack
	pchl			;"goto" command
;
; **** Deinitialize Terminal and Exit to ZCPR3 ****
;
exit:
	call	strtzex		;resume ZEX if running
	jmp	dinit		;deinit terminal
;
; **** Memory Dumper ****
;
memory:
	call	banner
	call	gxymsg
	db	3,25
	db	'--> ',1,'Memory Display at ',0
	lhld	dumpstrt	;start of dump address
	call	phl4hc
	call	vprint
	db	2,' <--',cr,lf,0
	mvi	b,16
mem1:
	shld	cline	;set current line ptr
	call	crlf	;new line
	call	phl4hc	;print address
	call	vprint
	db	1,' --',2,0
	mvi	c,16	;count for elements
mem2:
	mov	a,c	;extra space?
	ani	3
	mvi	a,' '	;extra space
	cz	cout
	mov	a,m	;get next byte
	call	pa2hc	;print as hex
	mvi	a,' '	;space
	call	cout
	inx	h	;pt to next
	dcr	c	;count down
	jnz	mem2
	call	vprint
	db	1,'| ',2,0
	lhld	cline	;pt to current line again
	mvi	c,16	;count again
mem3:
	mov	a,m	;get next byte
	ani	7fh	;mask MSB
	cpi	' '
	jnc	mem4
	mvi	a,'.'	;dot fill
mem4:
	call	cout
	inx	h	;pt to next
	dcr	c	;count down
	jnz	mem3
	dcr	b	;count down major loop
	jnz	mem1
	call	gxymsg	;print prompt
	db	23,10
	db	1,'Command (<=last, >=next, A=adr, SHOW Cmd)? ',2,0
	call	capine	;get input
	cpi	'A'	;address?
	jz	memadr
	cpi	'>'	;advance?
	jz	memnext
	cpi	'.'	;advance?
	jz	memnext
	cpi	'<'	;backup?
	jz	memback
	cpi	','	;backup?
	jz	memback
	jmp	getcmd1	;process otherwise
memadr:
	call	print
	db	'ddress (Hex)? ',0
	mvi	a,0ffh	;capitalize
	call	bbline	;get line from user
mema1:
	mov	a,m	;skip leading spaces
	inx	h	;pt to next char
	cpi	' '
	jz	mema1
	dcx	h	;pt to first char
	call	eval16	;evaluate as hex
	xchg		;result in HL
	shld	dumpstrt	;set new start address
	jmp	memory	;restart
memnext:
	lhld	dumpstrt	;advance 1 page
	inr	h
	shld	dumpstrt
	jmp	memory	;restart
memback:
	lhld	dumpstrt	;backup 1 page
	dcr	h
	shld	dumpstrt
	jmp	memory	;restart
;
; **** ZCPR3 Messages ****
;
msg:
	call	banner
	call	gxymsg
	db	3,25
	db	'--> ',1,'ZCPR3 System Messages',2,' <--',0
	mvi	h,5	; row 5
	mvi	l,5	; column 5
	shld	infoxy
	mvi	a,22h	; offset
	call	compenv	; pt to address of messages
	mov	a,m
	inx	h
	mov	h,m
	mov	l,a	; HL pts to first message
	call	dispxy
	call	vprint
	db	1,'Error Handler Defined? ',2,0
	mov	a,m	; get flag
	call	pryn
	mov	a,m	; get flag again
	ora	a	; defined?
	jz	msg1
	push	h
	lxi	d,10h	; pt to error command line
	dad	d
	call	dispxy
	call	vprint
	db	1,' Error Handler:        ',2,0
	call	pstr
	pop	h
msg1:
	inx	h
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'Current IF Level:      ',2,0
	mvi	b,8	; set IF count
	mov	c,m	; get IF flag
iftst:
	mov	a,c	; get flag
	rlc
	mov	c,a	; save flag
	jc	iftst1
	dcr	b	; count down
	jnz	iftst
iftst1:
	mov	a,b	; get char
	call	padc
	inx	h	; pt to IF active flag
	inx	h	; pt to command status
	shld	cstat	; save address
	inx	h	; pt to error address
	inx	h
	inx	h	; pt to program error code
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'Program Error Code:    ',2,0
	mov	a,m
	call	padc
	inx	h	; pt to ZEX message byte
	inx	h	; pt to ZEX running flag
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'ZEX Running?           ',2,0
	mov	a,m
	call	pryn
	mov	a,m	; make sure we have char
	inx	h	; skip ZEX data
	inx	h
	inx	h
	ora	a	; ZEX running?
	jz	nozex
	mov	e,m	; get low-order
	inx	h
	mov	d,m	; get high-order
	call	dispxy
	call	vprint
	db	1,'Address of ZEX Buffer: ',2,0
	xchg
	call	phl4hc	; print address
	xchg
	jmp	scb	; process shell control byte now
nozex:
	inx	h
scb:
	inx	h	; pt to shell control byte
	push	h
	mvi	h,5	; row 5
	mvi	l,40	; column 40
	shld	infoxy
	pop	h
	call	dispxy
	call	vprint
	db	1,'Shell Control --',2,0
	call	dispxy
	call	vprint
	db	1,' Enable Shell Comment? ',2,0
	mov	a,m
	ani	1
	call	pryn
	call	dispxy
	call	vprint
	db	1,' Enable Shell Echo?    ',2,0
	mov	a,m
	ani	10b
	call	pryn
	call	dispxy
	call	vprint
	db	1,' Enable Shell Wait?    ',2,0
	mov	a,m
	ani	80h
	call	pryn
	push	h	; save ptr to next message byte
	lhld	cstat	; get ptr to command status
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'Command Status:        ',2,0
	mov	a,m	; get it
	ani	3	; 2 LSBs
	jz	csnorm
	cpi	1
	jz	csshell
	call	print
	db	'Error',0
	inx	h	; pt to error address
	mov	a,m	; get low
	inx	h
	mov	h,m	; get high
	mov	l,a
	call	dispxy
	call	vprint
	db	1,' Error Command         ',2,0
	call	dispxy
	call	print
	db	'     ',0
erprt:
	mov	a,m	; get char
	cpi	' '+1	; end of command with space or less?
	jc	csdone
	cpi	';'	; end of command with new command?
	jz	csdone
	call	cout	; print char
	inx	h
	jmp	erprt
csnorm:
	call	print
	db	'Normal',0
	jmp	csdone
csshell:
	call	print
	db	'Shell',0
csdone:
	pop	h	; restore ptr
	lxi	d,35	; jump to registers
	dad	d
	push	h
	mvi	h,17	; row 17
	mvi	l,5	; column 5
	shld	infoxy
	pop	h
	call	dispxy
	call	vprint
	db	1,'Registers --',2,0
	call	dispxy	; new line
	mvi	b,10	; 10 times
	mvi	c,0
regl:
	call	vprint
	db	1,'  ',0
	mvi	a,10+'0'	; compute reg char
	sub	b	; get value
	call	cout
	call	vprint
	db	'=',2,0
	mov	a,m	; get value
	inx	h	; pt to next
	call	padc	; print
	inr	c	; every 4
	mov	a,c	; get count
	ani	3
	cz	dispxy	; new line
	dcr	b	; count down
	jnz	regl
	lxi	d,6	; skip to user-defined values
	dad	d
	push	h
	mvi	h,17	; row 17
	mvi	l,40	; column 40
	shld	infoxy
	pop	h
	call	dispxy
	call	vprint
	db	1,'User-Defined Area --',2,0
	call	dispxy	; new line
	mvi	b,16	; 16 times
	mvi	c,0
regl1:
	call	vprint
	db	'   ',0
	mov	a,m	; get value
	inx	h	; pt to next
	call	padc	; print
	inr	c	; every 4
	mov	a,c	; get count
	ani	3
	cz	dispxy	; new line
	dcr	b	; count down
	jnz	regl1
	jmp	getcmd
;
; **** System File Definitions ****
;
fnames:
	call	banner
	call	gxymsg
	db	3,27
	db	'--> ',1,'System File Names',2,' <--',0
	mvi	h,5	; row 5
	mvi	l,24	; column 24
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,'Shell Variable File: ',2,0
	mvi	a,47h	; offset
	call	compenv
	xchg		; DE pts to file name
	call	pfn	; print file name
	call	dispxy
	mvi	b,'1'	; set counter
fnames1:
	lxi	h,11	; offset to next file
	dad	d	; pt to next file name
	xchg
	call	dispxy
	call	vprint
	db	1,'File Name ',0
	mov	a,b
	call	cout	; print number
	call	vprint
	db	':         ',2,0
	call	pfn	; print file name
	inr	b	; next name
	mov	a,b	; get next
	cpi	'4'+1	; done?
	jnz	fnames1
	jmp	getcmd
;
; Print File Name for FNAMES
;
pfn:
	ldax	d	; get first char
	cpi	' '	; none?
	jnz	pfn1	; print name
	lxi	h,8	; check type
	dad	d
	mov	a,m	; get first char of type
	cpi	' '	; none?
	jnz	pfn1	; print name
	call	print
	db	'Undefined',0
	ret
;
; **** CRT and Printer Data ****
;
cpdata:
	call	banner
	call	gxymsg
	db	3,26
	db	'--> ',1,'CRT and Printer Data',2,' <--',0
	mvi	h,5	; row 5
	mvi	l,5	; column 5
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,'CRT -- Selection: ',2,0
	mvi	a,2fh	; offset
	call	prbyte	; print byte value there
	call	dispxy
	call	vprint
	db	1,' CRT 0',2,0
	mvi	a,31h	; print data at 31H
	call	cprt
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'LST -- Selection: ',2,0
	mvi	a,30h	; offset
	call	prbyte	; print byte value there
	call	dispxy
	call	vprint
	db	1,' LST 0',2,0
	mvi	a,37h	; offset
	call	lprt
	call	dispxy
	call	dispxy
	call	vprint
	db	1,' LST 2',2,0
	mvi	a,3fh	; offset
	call	lprt
	mvi	h,6	; row 6
	mvi	l,40	; column 40
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,' CRT 1',2,0
	mvi	a,34h	; print data at 34H
	call	cprt
	call	dispxy
	call	dispxy
	call	dispxy
	call	vprint
	db	1,' LST 1',2,0
	mvi	a,3bh	; offset
	call	lprt
	call	dispxy
	call	dispxy
	call	vprint
	db	1,' LST 3',2,0
	mvi	a,43h	; offset
	call	lprt
	jmp	getcmd
;
; Print CRT Data
;
cprt:
	call	compenv	; compute offset
	call	dispxy
	call	vprint
	db	1,'   Width:      ',2,0
	mov	a,m
	call	padc
	call	vprint
	db	' Cols',0
	call	dispxy
	call	vprint
	db	1,'   Lines/Text: ',2,0
	inx	h
	mov	a,m
	call	padc
	call	vprint
	db	' / ',0
	inx	h
	mov	a,m
	call	padc
	ret
;
; Print LST Data
;
lprt:
	call	compenv	; compute offset
	call	dispxy
	call	vprint
	db	1,'   Width:      ',2,0
	mov	a,m
	call	padc
	call	vprint
	db	' Cols',0
	call	dispxy
	call	vprint
	db	1,'   Lines/Text: ',2,0
	inx	h
	mov	a,m
	call	padc
	call	vprint
	db	' / ',0
	inx	h
	mov	a,m
	call	padc
	inx	h
	call	dispxy
	call	vprint
	db	1,'   Form Feed?  ',2,0
	mov	a,m
	call	pryn
	ret

;
; **** Print Environment Descriptor Data ****
;
envdes:
	call	banner
	call	gxymsg
	db	3,25
	db	'--> ',1,'Environment Descriptor',2,' <--',0
	mvi	h,5	; row 5
	mvi	l,5	; column 5
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,'>> Addresses <<',2,0
	call	dispxy
	call	vprint
	db	1,' Command Line Buffer:    ',2,0
	mvi	a,18h	; offset
	call	pradr	; print address
	call	dispxy
	call	vprint
	db	1,' Command-Search Path:    ',2,0
	mvi	a,9	; offset
	call	pradr	; print address
	call	dispxy
	call	vprint
	db	1,' Environment Descriptor: ',2,0
	lhld	envptr	; get ptr
	call	phl4hc
	call	dispxy
	call	vprint
	db	1,' Externals --',2,0
	call	dispxy
	call	vprint
	db	1,'   File Control Block:   ',2,0
	mvi	a,24h
	call	pradr
	call	dispxy
	call	vprint
	db	1,'   System Stack:         ',2,0
	mvi	a,26h
	call	pradr
	call	dispxy
	call	vprint
	db	1,' Message Buffer:         ',2,0
	mvi	a,22h
	call	pradr
	call	dispxy
	call	vprint
	db	1,' Named Directory Buffer: ',2,0
	mvi	a,15h
	call	pradr
	call	dispxy
	call	vprint
	db	1,' Packages --',2,0
	call	dispxy
	call	vprint
	db	1,'    Flow Command:        ',2,0
	mvi	a,12h
	call	pradr
	call	dispxy
	call	vprint
	db	1,'    Input/Output:        ',2,0
	mvi	a,0fh
	call	pradr
	call	dispxy
	call	vprint
	db	1,'    Resident Command:    ',2,0
	mvi	a,0ch
	call	pradr
	call	dispxy
	call	vprint
	db	1,' Shell Stack Buffer:     ',2,0
	mvi	a,1eh
	call	pradr
	call	dispxy
	call	vprint
	db	1,' Wheel Byte:             ',2,0
	mvi	a,29h
	call	pradr
	mvi	h,5	; row 5
	mvi	l,40	; column 40
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,'>> Data Elements <<',2,0
	call	dispxy
	call	vprint
	db	1,' Sizes --',2,0
	call	dispxy
	call	vprint
	db	1,'   Command Line:      ',2,0
	mvi	a,1ah
	call	prbyte
	call	vprint
	db	' Chars',0
	call	dispxy
	call	vprint
	db	1,'   External Path:     ',2,0
	mvi	a,0bh
	call	prbyte
	call	vprint
	db	' Elts',0
	call	dispxy
	call	vprint
	db	1,'   Named Dir Entries: ',2,0
	mvi	a,17h
	call	prbyte
	call	dispxy
	call	vprint
	db	1,'   Package, FCP:      ',2,0
	mvi	a,14h
	call	prbyte
	call	pr128
	call	dispxy
	call	vprint
	db	1,'   Package, IOP:      ',2,0
	mvi	a,11h
	call	prbyte
	call	pr128
	call	dispxy
	call	vprint
	db	1,'   Package, RCP:      ',2,0
	mvi	a,0eh
	call	prbyte
	call	pr128
	call	dispxy
	call	vprint
	db	1,'   Shell Stack Elts:  ',2,0
	mvi	a,20h
	call	prbyte
	call	dispxy
	call	dispxy
	call	vprint
	db	1,' DU Form Allowed?     ',2,0
	mvi	a,2eh
	call	compenv
	mov	a,m	; get byte
	call	pryn
	call	dispxy
	call	vprint
	db	1,' Max Disk and User:   ',2,0
	mvi	a,2ch
	call	compenv
	mov	a,m
	adi	'@'
	call	cout
	inx	h
	mov	a,m
	call	pafdc
	call	dispxy
	call	vprint
	db	1,' Processor Speed:     ',2,0
	mvi	a,2bh
	call	prbyte
	call	vprint
	db	' MHz',0
	call	dispxy
	call	vprint
	db	1,' Quiet Operation?     ',2,0
	mvi	a,28h
	call	compenv
	mov	a,m	; get byte
	call	pryn
	jmp	getcmd
;
; Print 128-Byte Block Message
;
pr128:
	call	vprint
	db	' Blocks',0
	ret
;
; Print address pted to by A offset as 4 hex chars
;
pradr:
	call	compenv	; pt to address
	mov	e,m	; get address
	inx	h
	mov	d,m
	xchg
	jmp	phl4hc
;
; Print byte pted to by A offset as dec chars
;
prbyte:
	call	compenv	; compute offset (in HL)
	mov	a,m	; get byte
	jmp	padc
;
; Add A to Base Address in ENVPTR
;  Return Result in HL
;
compenv:
	lhld	envptr	; get base address
	add	l	; add offset
	mov	l,a
	mov	a,h
	aci	0
	mov	h,a
	ret
;
; **** Display Input/Output Package Function ****
;
iopack:
	call	banner
	call	gxymsg
	db	3,26
	db	'--> ',1,'Input/Output Package',2,' <--',0
	call	getiop	;check for initialization
	mov	a,h
	ora	l	;must NOT be zero
	jnz	iopack0
	call	gxymsg
	db	5,23,'Input/Output Packages Not Available',0
	jmp	getcmd
iopack0:
	call	status	;check for drivers
	jnz	iopack1
	call	gxymsg
	db	5,22,'Input/Output Redirection Not Available',0
	jmp	getcmd
iopack1:
	call	dispcon	;successive displays
	call	disprdr
	call	gxymsg
	db	23,10,'Strike Any Key For Next Screen - ',0
	call	capine
	call	banner
	call	gxymsg
	db	3,26
	db	'--> ',1,'Input/Output Package',2,' <--',0
	call	disppun
	call	displst
	jmp	getcmd
dispcon:
	call	vprint
	db	cr,lf,cr,lf,1,'Console',0
	mvi	a,0	;select CON:
	call	disp
	jmp	curr
displst:
	call	vprint
	db	cr,lf,cr,lf,1,'Printer',0
	mvi	a,3	;select LST:
	call	disp
	jmp	curr
disprdr:
	call	vprint
	db	cr,lf,cr,lf,1,'Reader ',0
	mvi	a,1	;select RDR:
	call	disp
	jmp	curr
disppun:
	call	vprint
	db	cr,lf,cr,lf,1,'Punch  ',0
	mvi	a,2	;select PUN:
	call	disp
;
;  Print Name of Current Device
;
curr:
	push	h	;save ptr
	mov	b,a	;save number in B
	push	b	;save B
	call	vprint
	db	cr,lf,1,' Assignment is ',2,0
	push	b	;save B
	call	status	;get status
	pop	b	;get B
	inr	b	;add 1 for offset
	dcx	h	;back up
curr1:
	inx	h	;pt to next
	inx	h
	dcr	b	;count down
	jnz	curr1
	pop	b	;get logical number in B
	mov	c,m	;get physical number in C
	call	pname0	;print first part of name only
	pop	h	;get ptr
	ret
;
;  Print Names of All Physical Devices for a Logical Device
;
disp:
	push	h	;save char ptr
	push	psw	;save device number
	call	vprint
	db	' Devices --',2,0
	mov	b,a	;logical device in B
	push	b	;save for later
	push	b	;save it
	call	status	;get status report
	pop	b	;get logical device number
	inr	b	;add 1 for offset
	dcx	h	;back up
	dcx	h
disp1:
	inx	h	;pt to next
	inx	h
	dcr	b	;count down
	jnz	disp1
	pop	b	;get B back
	mov	c,m	;get count of devices
	mov	a,c	;check for none
	ora	a
	jz	disp3
disp2:
	push	b	;save values
	dcr	c	;pt to next name
	call	print
	db	cr,lf,'    ',0
	call	pnamer	;print name (B=logical, C=physical)
	pop	b	;get count
	dcr	c	;count down
	jnz	disp2
disp3:
	pop	psw
	pop	h
	ret
;
;  Routine to Print Name of Selected Device
;	B=logical number, C=physical number
;
pnamer:
	push	b	;save BC
	call	pname0	;print first part of name
	call	vprint	;print separator
	db	1,' - ',2,0
	call	pstr	;print rest as string
	pop	b	;restore BC
	ret
;
;  Print first part of selected device name
;
pname0:
	call	namer	;get ptr to string
	mvi	b,8	;at most 8 chars
pname1:
	mov	a,m	;get char
	inx	h	;pt to next char
	cpi	' '	;end of name?
	jz	pname2
	call	cout	;print char
	dcr	b	;count down
	jnz	pname1
	ret
pname2:
	mvi	a,' '	;print spaces
	call	cout
	dcr	b	;count down
	jnz	pname2
	ret

;
;  Basic Interface Routines
;
status:
	lxi	d,0	;Offset 0
runit:
	call	getiop	;device driver base
	dad	d
	pchl
select:
	lxi	d,3	;Offset 3
	jmp	runit
namer:
	lxi	d,6	;Offset 6
	jmp	runit

;
; **** Display Path Function ****
;
pdisp:
	call	banner
	call	gxymsg
	db	3,28
	db	'--> ',1,'Path Expressions',2,' <--',0
	mvi	h,6	; row 6
	mvi	l,10	; column 10
	shld	infoxy
	call	dispxy
	call	vprint
	db	1,'Symbolic Form',2,0
	call	dispxy
	call	vprint
	db	'     ',0
	call	getpath	; pt to external path
pdisp1:
	mov	a,m	; get disk
	ora	a	; done?
	jz	adisp
	cpi	'$'	; current?
	jz	pdisp2
	adi	'@'	; convert to letter
pdisp2:
	call	cout	; print disk letter
	inx	h	; pt to user
	mov	a,m	; get user number
	cpi	'$'	; current?
	jnz	pdisp3
	call	cout	; print current indicator
	jmp	pdisp4
pdisp3:
	call	pafdc	; print user number
pdisp4:
	call	colon
	inx	h	; pt to next element
	mov	a,m	; done?
	ora	a	; 0=yes
	cnz	arrow
	jmp	pdisp1
;
;  Print Absolute Path
;
adisp:
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'DU Form      ',2,0
	call	dispxy
	call	vprint
	db	'     ',0
	call	retud	; get current user/disk
	call	getpath	; pt to external path
adisp1:
	mov	a,m	; get disk
	ora	a	; done?
	jz	ndisp
	cpi	'$'	; current?
	jnz	adisp2
	mov	a,b	; get current disk
	inr	a	; adjust to 1 to n
adisp2:
	adi	'@'	; convert to letter
	call	cout	; print disk letter
	inx	h	; pt to user
	mov	a,m	; get user
	cpi	'$'	; current?
	jnz	adisp3
	mov	a,c	; get current user
adisp3:
	call	pafdc	; print user
	call	colon
	inx	h	; pt to next
	mov	a,m	; done?
	ora	a
	cnz	arrow
	jmp	adisp1
;
;  Print Named Path
;
ndisp:
	call	dispxy
	call	dispxy
	call	vprint
	db	1,'DIR Form     ',2,0
	call	dispxy
	call	vprint
	db	'     ',0
	call	getpath	; pt to external path
ndisp1:
	call	retud	; get current user and disk in C and B
	mov	a,m	; get disk
	ora	a	; done?
	jz	getcmd
	cpi	'$'	; current?
	jz	ndisp2
	mov	b,a	; disk in B
	dcr	b	; adjust to 0 to n-1
ndisp2:
	inx	h	; pt to user
	mov	a,m	; get it
	cpi	'$'	; current?
	jz	ndisp3
	mov	c,a	; user in C
ndisp3:
	inx	h	; pt to next
	push	h	; save ptr
	call	udscan	; scan dirs for user/disk and print its name
	pop	h	; get ptr
	call	colon
	mov	a,m	; done?
	ora	a
	cnz	arrow
	jmp	ndisp1

;
;  Print Colon
;
colon:
	mvi	a,':'	; print colon
	jmp	cout

;
;  Print Arrow
;
arrow:
	call	vprint
	db	1,' --> ',2,0
	ret

;
;  Scan directories for user and disk in C and B
;	Print name if found or "Noname" if not
;
udscan:
	call	dutdir	; convert to name
	jz	udscan1	; error return if no name
	mvi	b,8	; 8 chars max
udsprn:
	mov	a,m	; get name char
	cpi	' '	; done?
	rz
	call	cout	; print char
	inx	h	; pt to next
	dcr	b	; count down
	jnz	udsprn
	ret
udscan1:
	call	vprint
	db	'Noname',0
	ret

;
; **** Print Named Directory Info ****
;
namedir:
	call	banner
	call	gxymsg
	db	3,26
	db	'--> ',1,'Named Directory Data',2,' <--',0
	call	getndr	;get location of directory
	jnz	ndir1
	call	gxymsg
	db	5,22
	db	'Named Directory Buffer Not Available',0
	jmp	getcmd
;
; Print Names of Directory Elements
;
ndir1:
	call	gxymsg
	db	5,25
	db	'-- Named Directory Entries --',0
	mvi	d,7	;set row
	mvi	e,7	;set column
	xchg
	call	gotoxy	;position cursor
	xchg
	mvi	c,0	;set entry count
	mvi	b,1	;set disk 1
;
; Print Each Resident Command Name
;
ndir2:
	mov	a,m	;get table entry
	ora	a	;end of table?
	jz	getcmd
;
; DE is carried over all of this as starting row/column
;
	cmp	b	;same disk?
	jz	ndir3
;
; Advance to Next Set of Entries for New Disk
;
	mvi	c,0	;reset counter
	mov	b,a	;set new disk
	xchg		;position for new disk
	inr	h	;blank line
	inr	h
	call	gotoxy	;position on screen
	xchg
ndir3:
	push	b	;save counters
;
; Print DU:
;
	mov	a,m	;get disk
	adi	'@'	;convert to letter (A to P)
	call	cout
	inx	h	;pt to user
	mov	a,m	;get user
	call	padc	;print user number
	call	print	;print separator
	db	': ',0
	inx	h	;pt to name
;
; Print DIR
;
	mvi	b,8	;print name
ndir4:
	mov	a,m	;get char
	call	cout
	inx	h	;pt to next
	dcr	b	;count down
	jnz	ndir4
;
; Advance to Next and Print Separator
;
	lxi	b,8	;skip over password
	dad	b
	call	print	;print separator
	db	'  ',0
	pop	b	;get counters
;
; New Line Counter
;
	inr	c	;increment entry counter
	mov	a,c	;check for done
	ani	3	;every 4
	jnz	ndir2
;
; Position in Next Line
;
	xchg		;position cursor
	inr	h	;next row
	call	gotoxy
	xchg
	jmp	ndir2

;
; **** Print Command Status ****
;
command:
	call	banner
	call	gxymsg
	db	3,25
	db	'--> ',1,'Command Package Status',2,' <--',0
	call	gxymsg
	db	5,25
	db	'---- ',1,'FLOW COMMAND PACKAGE',2,' ----',0
	call	getfcp	;get FCP data
	jnz	flow0
	call	gxymsg
	db	7,20
	db	'Flow Command Facility Not Available',0
	jmp	rcp
;
; Check for Flow Command Package Loaded
;
flow0:
	mov	a,m	;get first byte
	ora	a	;0=none loaded
	jnz	flow1
	call	gxymsg
	db	7,25
	db	'No Flow Command Package Loaded',0
	jmp	rcp
;
; Print Flow Command Package Info
;
flow1:
	call	gxymsg
	db	7,20
	db	1,'Flow Commands:',2,0
	lxi	d,5	;skip to command size byte
	dad	d
	mov	b,m	;get command size
	inx	h	;pt to first command
	call	at
	db	8,22
;
; Print Flow Command Names
;
flow2:
	mov	a,m	;get first char
	ora	a	;end of table?
	jz	flow4
	push	b	;save counter
flow3:
	mov	a,m	;get char
	inx	h	;pt to next
	call	cout	;print char
	dcr	b	;count down
	jnz	flow3
	call	print
	db	'  ',0
	inx	h	;skip over address
	inx	h
	pop	b	;get counter
	jmp	flow2
;
; Print Flow Command Arguments
;
flow4:
	call	gxymsg
	db	9,20
	db	1,'IF Options:',2,0
	call	at
	db	10,22
	inx	h	;pt to first option
;
; Print Each Option
;
flow5:
	mov	a,m	;get next char
	ora	a	;done?
	jz	flow6
	call	cout	;print char
	inx	h	;pt to 2nd char
	mov	a,m	;get it and print
	call	cout
	call	print
	db	'  ',0	;space over
	inx	h	;skip address
	inx	h
	inx	h
	jmp	flow5
;
; Print Current IF Level
;
flow6:
	call	gxymsg
	db	11,20
	db	1,'Current IF Level: ',2,0
	call	getmsg	;pt to ZCPR3 messages
	inx	h	;pt to IF byte
	mov	a,m	;get IF byte
	mvi	c,'0'	;assume level 0
	ora	a	;see if at last IF level
	jz	flow8
flow7:
	inr	c	;advance to next level
	rrc		;rotate bits
	ani	7fh	;mask out MSB
	jnz	flow7	;continue looping until no 1 bits
flow8:
	mov	a,c	;get digit
	call	cout	;print it
;
; Print RCP Data
;
rcp:
	call	gxymsg
	db	14,23
	db	'---- ',1,'RESIDENT COMMAND PACKAGE',2,' ----',0
	call	getrcp	;get RCP data
	jnz	rcp0
	call	gxymsg
	db	16,20
	db	'Resident Command Facility Not Available',0
	jmp	getcmd
;
; Check for Resident Command Package Loaded
;
rcp0:
	mov	a,m	;get first byte
	ora	a	;0=none loaded
	jnz	rcp1
	call	gxymsg
	db	16,23
	db	'No Resident Command Package Loaded',0
	jmp	getcmd
;
; Print Resident Command Package Info
;
rcp1:
	call	gxymsg
	db	16,20
	db	1,'Resident Commands:',2,0
	lxi	d,5	;skip to command size byte
	dad	d
	mov	b,m	;get command size
	mvi	c,0	;set count
	inx	h	;pt to first command
	mvi	d,17	;set row
	mvi	e,22	;set column
	xchg
	call	gotoxy	;position cursor
	xchg
;
; Print Each Resident Command Name
;
rcp2:
	mov	a,m	;get table entry
	ora	a	;end of table?
	jz	getcmd
	push	b	;save counters
rcp3:
	mov	a,m	;get char
	inx	h	;pt to next
	call	cout
	dcr	b	;count down
	jnz	rcp3
	call	print
	db	'  ',0
	inx	h	;pt to next command
	inx	h
	pop	b	;get counters
	inr	c	;increment entry counter
	mov	a,c	;check for done
	ani	7	;every 8
	jnz	rcp2
	xchg		;position cursor
	inr	h	;next row
	call	gotoxy
	xchg
	jmp	rcp2

;
; **** Print Error Handler Data ****
;
errorh:
	call	banner
	call	gxymsg
	db	3,27
	db	'--> ',1,'Error Handler Data',2,' <--',0
	call	getmsg	;get message address
	jnz	errh1
	call	gxymsg
	db	5,20
	db	'ZCPR3 Messages Not Available on this System',0
	jmp	getcmd
errh1:
	call	gxymsg
	db	5,27
	db	1,'Error Handler Engaged? ',2,0
	call	geter1	;error handler engaged?
	push	psw
	call	pryn	;print yes/no
	pop	psw
	jz	getcmd	;exit display
	call	gxymsg
	db	6,27
	db	1,'Error Handler Command: ',2,0
	call	geterc	;get command line
	call	pstr
	call	gxymsg
	db	7,30
	db	1,'Command Status: ',2,0
	mvi	a,22h	; offset to message ptr
	call	compenv	; pt to message ptr
	mov	a,m
	inx	h
	mov	h,m
	mov	l,a	; HL pts to messages
	inx	h	; pt to command status message
	inx	h
	inx	h
	mov	a,m	; get it
	ani	3	; 2 LSBs
	jz	errh3
	cpi	1
	jz	errh4
	call	print
	db	'Error',0
	inx	h	; pt to error address
	mov	a,m	; get low
	inx	h
	mov	h,m	; get high
	mov	l,a
	call	gxymsg
	db	9,5
	db	1,'Error Command --',2,0
	call	vprint
	db	cr,lf,1,' --> ',2,0
errh2:
	mov	a,m	; get char
	inx	h	; pt to next
	ora	a	; end of line?
	jz	errh5
	cpi	';'	; end of command with new command?
	jnz	errh2a
	call	vprint
	db	1,';',2,cr,lf,1,' --> ',2,0
	jmp	errh2
errh2a:
	call	cout	; print char
	jmp	errh2
errh3:
	call	print
	db	'Normal',0
	jmp	errh5
errh4:
	call	print
	db	'Shell',0
errh5:
	jmp	getcmd

;
; **** Print Shell Stack Data ****
;
shstack:
	call	banner
	call	gxymsg
	db	3,28
	db	'--> ',1,'Shell Stack Data',2,' <--',0
	call	getsh	;get shell data
	jnz	shs0
	call	gxymsg
	db	5,20
	db	'Shell Stack NOT Available on this System',0
	jmp	getcmd
;
; Print Empty/Full Messages
;
shs0:
	call	gxymsg
	db	5,30
	db	'Shell Stack Empty? ',0
	call	shempty
	jz	shsem
	mvi	a,0	; set not empty
	jmp	shsnem
shsem:
	mvi	a,1	; set empty
shsnem:
	call	pryn
	call	gxymsg
	db	6,30
	db	'Shell Stack Full?  ',0
	call	shfull
	jz	shsfu
	mvi	a,0	; set not full
	jmp	shsnfu
shsfu:
	mvi	a,1	; set full
shsnfu:
	call	pryn
;
; Print Shell Stack Content Data
;
	call	gxymsg
	db	8,27
	db	'--- Shell Stack Content ---',0
	mvi	h,10	;row 10
	mvi	l,20	;col 20
	shld	infoxy	;save position
	call	getsh	;get shell stack data
	mov	e,b	;get element size in DE
	mvi	d,0
	mov	b,a	;get element count in B
	mvi	c,'1'	;get digit in C
shs1:
	mov	a,m	;check for element in stack
	ora	a	;0=empty
	jz	shs2
	call	dispxy	;position for display
	call	vprint
	db	1,'Elt ',0
	mov	a,c	;get digit
	call	cout	;print as decimal
	inr	c	;next digit
	call	vprint
	db	' -- ',2,0
	push	h
	call	pstr	;print entry
	pop	h
	dad	d	;pt to next
	dcr	b	;count down
	jnz	shs1
shs2:
	mov	a,c	;see if anything printed
	cpi	'1'
	jnz	getcmd
	lhld	infoxy	;position on screen
	call	gotoxy
	call	print
	db	'     Empty',0
	jmp	getcmd

;
; Position Display at INFOXY address and advance
;
dispxy:
	push	h	;save HL
	lhld	infoxy	;get screen position
	call	gotoxy	;go there
	inr	h	;advance to next line
	shld	infoxy	;set screen position
	pop	h	;restore HL
	ret
;
; If A=0, print Yes, else print No
;
pryn:
	ora	a
	jnz	pryes
	call	print
	db	'NO',0
	ret
pryes:
	call	print
	db	'YES',0
	ret

;
; Buffers
;
showcmd:
	db	'SHOW    ',0
infoxy:
	ds	2	;address on screen of next line to print
cstat:
	ds	2	;command status ptr
dumpstrt:
	ds	2	;address of next byte to start memory dump
cline:
	ds	2	;address of current line

	end