;	TITLE  'MEX Overlay for Apple ][ / SSC / Smartmodem'
;
;  MXH-AP52.ASM 
;
REV	EQU	52   		; 01 Nov 1986
; 
; This overlay is specific for the following hardware:
;
;	Apple ][ +/e  with PCPI Applicard
;	Apple Super Serial Card
;
;			- Jim Lill via "Sparrow" 716-377-1113
;------------------------------------------------------------------
; REVISION HISTORY:
;------+---------+----------------+--------------------------------
; Rev. |  Date   |     Author     |       Description
;------+---------+----------------+--------------------------------
; 5.2  |1 Nov 86 | Jim Lill       | -eliminated Modem specific section
;      |         |                |  requires use of Modem overlay
;      |         |                |  such as MXO-SM14 or MXM-2413
;      |         |                |  Seems to work better with MXM-2413
;------+---------+----------------+--------------------------------
; 5.1  |5 Apr 86 | Jim Lill       | -changed CLSMSG and EOSMSG
;      |         |                | -added INITBAUD equate for setting
;      |         |                |  MSPEED and baud in INITMOD
;------+---------+----------------+--------------------------------
; 5.0  |1 Apr 86 | Jim Lill       | created adaption, includes DCD
;      |         |                | and a spot for RND detect.
;------+---------+----------------+--------------------------------
; IMPORTANT NOTE:
;    This overlay is based on MXO-AP50.ASM by Henry Middlebrook
;    Refer to it for additional info. The changes in this overlay
;    could be easily adapted to other Middlebrook work like AP34
;    To find changes, search for "MEXplus"
;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
;			PORT OVERLAY SECTION
;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
;
BELL		EQU	07H	;bell
CR		EQU	0DH	;carriage return
ESC		EQU	1BH	;escape
LF		EQU	0AH	;linefeed
TAB		EQU	09H	;tab
YES		EQU	0FFH
NO		EQU	0
;
;----------------------------------------------------------------------
;	Apple Super Serial Card equates
;	-------------------------------
;
SSCSLOT		EQU	2		;Slot of Super Serial Card
;
INITBAUD	EQU	5		;Initial Baud Rate
					; 0=110   5=1200
					; 1=300   6=2400
					; 2=450   7=4800
					; 3=600   8=9600
					; 4=710   9=19200
;
MODDATP		EQU	0C088H + (SSCSLOT*10H)	;data port of ACIA
MODSTAP		EQU	0C089H + (SSCSLOT*10H)	;status port of ACIA
MODCTLP		EQU	0C08BH + (SSCSLOT*10H)	;control port of ACIA
MODCMDP		EQU	0C08AH + (SSCSLOT*10H)	;command port of ACIA
;
;
RDBYTE		EQU	0FFE0H	;Read a Byte from Apple (A = BYTE)
WRBYTE		EQU	0FFE3H	;Write a Byte to Apple (C = BYTE)
RDWORD		EQU	0FFE6H	;Read 2 Bytes from Apple (DE = BYTES)
WRWORD		EQU	0FFE9H	;Write 2 Bytes to Apple (DE = BYTES)
RDNBYTS		EQU	0FFECH	;Read N Bytes (DE = COUNT, HL = BUFFER)
WRNBYTS		EQU	0FFEFH	;Write N Bytes (DE = COUNT, HL = BUFFER)
;
PEEK1BYTE	EQU	6	;Command to Peek 1 Byte in the Apple
POKE1BYTE	EQU	7	;Command to Poke 1 Byte to the Apple
;
; New DCD routine equate MEXplus
;
CTSMSK		EQU	00100000B	;mask to test for carrier
;
; Status bit equates for CCS serial port
;
MDSNDB		EQU	10H
MDSNDR		EQU	10H
MDRCVB		EQU	08H
MDRCVR		EQU	08H
;
; Equates for PSW (Parity, Stop Bit, Word Length) used by SSC ACIA
;  In these bytes the high nibble is the Word Length mask, the low
;  nibble is the Parity mask for the ACIA PSWFIX routine.
;
P8N1		EQU	010H	;8 NONE 1
P7E1		EQU	036H	;7 EVEN 1
P7O1		EQU	032H	;7 ODD 1
P7N1		EQU	030H	;7 NONE 1
;
BRKMSK		EQU	0CH	;mask byte for BREAK function
DISCB		EQU	0AH	;command byte for ACIA to drop DTR
;
;----------------------------------------------------------------------
;
;	MEX Service Processor Calls
;
MEX	EQU	0D00H	;address of the service processor
INMDM	EQU	255	;get char from port to A, CY=no more in 100 ms
TIMER	EQU	254	;delay 100ms * reg B
TMDINP	EQU	253	;B=# secs to wait for char, cy=no char
CHEKCC	EQU	252	;check for ^C from KBD, Z=present
SNDRDY	EQU	251	;test for modem-send ready
RCVRDY	EQU	250	;test for modem-receive ready
SNDCHR	EQU	249	;send a character to the modem (after sndrdy)
RCVCHR	EQU	248	;recv a char from modem (after rcvrdy)
LOOKUP	EQU	247	;table search: see CMDTBL comments for info
PARSFN	EQU	246	;parse filename from input stream
BDPARS	EQU	245	;parse baud-rate from input stream
SBLANK	EQU	244	;scan input stream to next non-blank
EVALA	EQU	243	;evaluate numeric from input stream
LKAHED	EQU	242	;get nxt char w/o removing from input
GNC	EQU	241	;get char from input, cy=1 if none
ILP	EQU	240	;inline print
DECOUT	EQU	239	;decimal output
PRBAUD	EQU	238	;print baud rate
PRNTBL	EQU	237	;print command table in columns (HL=addr)
PRID	EQU	236	;print MEX ID string on console
;
CONOUT	EQU	2	;simulated BDOS function 2: console char out
PRINT	EQU	9	;simulated BDOS function 9: print string
INBUF	EQU	10	;input buffer, same structure as BDOS 10
;
;
;======================================================================
;
	ORG	100H	;we begin
;
; changed jumps for MEXplus
;
	DB	0C3H	;flags a LOADable file (for 8080)
	DS	2	;MEX has a JMP START here	
;
; The following variables are located at the beginning of the program
; to facilitate modification without the need of re-assembly. They will
; be moved in MEX 2.0.
;
PMODEM:	DB	YES	;\ / These two locations are			103H
SMODEM:	DB	NO	;/ \ not referenced by MEX.			104H
TPULSE:	DB	'T'	;Tone/Pulse (used only in Smodem overlay)	105H
CLOCK:	DB	70	;70-72 valid range for PCPI       		106H
MSPEED:	DB	INITBAUD;sets display time for sending a file		107H
			;uses INITBAUD equate, changes during
			;use via PBAUD routine
BYTDLY:	DB	1	;default time to send character in		108H
			;terminal mode file transfer (0-9)
			;0=0 delay, 1=10 ms, 5=50 ms, 9=90 ms
CRDLY:	DB	1	;end-of-line delay in terminal			109H
			;mode file transfer for slow BBS systems
			;0=0 delay, 1=100 ms, 5=500 ms, 9=900 ms
COLUMS:	DB	5	;number of directory columns			10AH
SETFL:	DB	YES	;yes=user-defined SET command			10BH
SCRTST:	DB	YES	;yes=if home cursor and clear screen		10CH
			;routine at CLRSCRN
	DB	0	;was once ACKNAK, now spare			10DH
BAKFLG:	DB	NO	;yes=make .BAK file				10EH
CRCDFL:	DB	YES	;yes=default to CRC checking			10FH
			;no=default to Checksum checking
TOGCRC:	DB	YES	;yes=allow toggling of Checksum to CRC		110H
CVTBS:	DB	NO	;yes=convert backspace to rub			111H
TOGLBK:	DB	YES	;yes=allow toggling of bksp to rub		112H
ADDLF:	DB	NO	;no=no LF after CR to send file in		113H
			;terminal mode (added by remote echo)
TOGLF:	DB	YES	;yes=allow toggling of LF after CR		114H
TRNLOG:	DB	NO	;yes=allow transmission of logon		115H
			;write logon sequence at location LOGON
SAVCCP:	DB	YES	;yes=do not overwrite CCP			116H
LOCNXT:	DB	NO	;yes=local cmd if EXTCHR precedes		117H
			;no=not local cmd if EXTCHR precedes
TOGLOC:	DB	YES	;yes=allow toggling of LOCNXTCHR		118H
LSTTST:	DB	YES	;yes=allow toggling of printer on/off		119H
			;in terminal mode. Set to no if using
			;the printer port for the modem
XOFTST:	DB	YES	;yes=allow testing of XOFF from remote		11AH
			;while sending a file in terminal mode
XONWT:	DB	NO	;yes=wait for XON after sending CR while	11BH
			;transmitting a file in terminal mode	
TOGXOF:	DB	YES	;yes=allow toggling of XOFF testing		11CH
IGNCTL:	DB	NO	;yes=do not send control characters		11DH
			;above CTL-M to CRT in terminal mode
			;no=send any incoming CTL-char to CRT
EXTRA1:	DB	0	;for future expansion				11EH
EXTRA2:	DB	0	;for future expansion				11FH
BRKCHR:	DB	'@'-40H	;^@ = Send a 300 ms. break tone			120H
NOCONN:	DB	'N'-40H	;^N = Disconnect from phone line		121H
LOGCHR:	DB	'L'-40H	;^L = Send logon				122H
LSTCHR:	DB	'P'-40H	;^P = Toggle printer				123H
UNSVCH:	DB	'R'-40H	;^R = Close input text buffer			124H
TRNCHR:	DB	'T'-40H	;^T = Transmit file to remote			125H
SAVCHR:	DB	'Y'-40H	;^Y = Open input text buffer			126H
EXTCHR:	DB	'^'-40H	;^^ = Send next character			127H
;
; Equates used only by PMMI routines grouped together here.
;
PRATE:	DB	125	;125=20pps dialing, 250=10pps			128H
	DB	0	;not used					129H
;
; Jump table accessed by MEX to write/read serial port
;
IN$MODSTAP:	JMP	RD$MODSTAP 	;read ACIA status port		12AH
		DS	7
OUT$MODDATP:	JMP	WR$MODDATP	;send character to ACIA		134H
		DS	7
IN$MODDATP:	JMP	RD$MODDATP	;read character from ACIA	13EH
		DS	7
;
; Bit-test routines.  These will be merged with the above
; routines in MEX 2.0 to provide a more reasonable format
;
MASKR:		ANI	MDRCVB ! RET	;bit to test for receive ready	148H
TESTR:		CPI	MDRCVR ! RET	;value of rcv. bit when ready	14BH
MASKS:		ANI	MDSNDB ! RET	;bit to test for send ready	14EH
TESTS:		CPI	MDSNDR ! RET	;value of send bit when ready	151H
;---------------------------------------------------------------------------
; MEXplus changes:
;  - was unused area. >>> MUST total 12bytes <<<
;  - now used for the Ringing and Carrier Detect jumps
;
; Note: There seems to be a conflict between other MXH overlays and
;       what is in the MexPlus Dist. Notes dated 2/20/86 regarding
;       the correct location of the two JMP. Other overlays inspected
;	have DCD at 154H and RNG at 157H. Notes say DCD at 157H and
;       RNG at 15AH. The following does work......
;
DCDTEST:	JMP	DCDVEC		;jump to carrier-detect routine 154H
RNGTEST:	JMP	RNGVEC		;jump to ring detect routine    157H
					;
                DS	6		;remainder of space		   
;
;---------------------------------------------------------------------------
;
LOGON:		DS	2		;not used by MEX  		160H
DIALV:		DS 	3		;dial a digit in A (ref SMOVL)	162H
DISCV:		JMP	DISCON		;drops DTR to hang-up fast!	165H
GOODBV:		JMP	GOODBYE		;called before exit to CPM	168H
INMODV:		JMP	INITMOD		;go to user written routine	16BH
NEWBDV:		JMP	PBAUD		;changes baud with phone #	16EH
NOPARV:		RET  !	NOP  !	NOP	;set modem for no-parity 	171H
PARITV:		RET  !	NOP  !	NOP	;set modem parity         	174H
SETUPV:		JMP	SETCMD		;				177H
SPMENV:		DS 	3		;not used by MEX		17AH
VERSNV:		JMP	SYSVER		;				17DH
BREAKV:		JMP	SENDBRK		;				180H
;
; The following jump vector provides the overlay with access to special
; routines in the main program (retained and supported in the main pro-
; gram for MDM overlay compatibility). These should not be modified by
; the overlay.
;
; Note that for MEX 2.0 compatibility, you should not try to use these
; routines, since this table will go away with MEX 2.0 (use the MEX
; service call processor instead).
;
ILPRTV:		DS	3	;replace with MEX function 9 		183H
INBUFV:		DS	3	;replace with MEX functin 10		186H
ILCMPV:		DS	3	;replace with table lookup funct 247	189H
INMDMV:		DS	3	;replace with MEX function 255		18CH
NXSCRV:		DS	3	;not supported by MEX			18FH
TIMERV:		DS	3	;replace with MEX function 254		192H
;
; Clear/screen and clear/end-of-screen. Each routine must use the
; full 9 bytes alloted (may be padded with nulls).
;
;
CLREOS:		LXI	D,EOSMSG	;				195H
		MVI	C,PRINT
		CALL	MEX
		RET			;				19DH
;
CLS:		LXI	D,CLSMSG	;				19EH
		MVI	C,PRINT
		CALL	MEX
		RET			;				1A6H
;
;
;		*** END OF FIXED FORMAT AREA ***
;--------------------------------------------------------------------------
; Make sure MEXplus has all of its' reserved area..
;
		ORG	0200H		

;--------------------------------------------------------------------------
;		Overlay  Fixed  Messages  Area
;
; these codes changed to match PCPI CONFIGSV values for Televideo 950
;
;
EOSMSG:	DB	ESC,89,0,0,'$'		;clear to end of screen message
;
CLSMSG:	DB	ESC,42,0,0,'$'		;clear screen message
;
VERMSG:	DB	CR,LF,'MEX for Apple ][ / PCPI / SSC, '
	DB	'Overlay Version: ',REV/10+'0','.'
	DB	REV MOD 10+'0'
	DB	CR,LF,LF,'$'
	DB	0,'Overlay by Middlebrook/Lill',0,'$'
;
;----------------------------------------------------------------------
; These routines are specific to the Apple ][+ with Applicard.  The
; routines read modem hardware (Apple Super Serial Card ACIA) directly
; from the Applicard.
;
; Read the Command Port of ACIA
;
RD$MODCMDP:	PUSH	D
		LXI	D,MODCMDP
		CALL	PEEK
		POP	D
		RET
;
; Write to the Command Port of ACIA
;
WR$MODCMDP:	PUSH	D
		LXI	D,MODCMDP
		CALL	POKE
		POP	D
		RET
;
; Read the Status Port of the ACIA
;
RD$MODSTAP:	PUSH	D
		LXI	D,MODSTAP
		CALL	PEEK
		POP	D
		RET
;
; Write to the Control Port of the ACIA
;
WR$MODCTLP:	PUSH	D
		LXI	D,MODCTLP
		CALL	POKE
		POP	D
		RET
;
; Read the Control Port of the ACIA
;
RD$MODCTLP:	PUSH	D
		LXI	D,MODCTLP
		CALL	PEEK
		POP	D
		RET
;
; Read Data Port of ACIA
;
RD$MODDATP:	PUSH	D
		LXI	D,MODDATP
		CALL	PEEK
		POP	D
		RET
;
; Write to the Serial Data Port of the ACIA
;
WR$MODDATP:	PUSH	D
		LXI	D,MODDATP
		CALL	POKE
		POP	D
		RET
;
; Peek at 1 byte from Apple 6502 address space
; ENTRY: DE = Address in Apple
; EXIT:	A = Data
;
PEEK:	PUSH	B
	MVI	C,PEEK1BYTE
	CALL	WRBYTE
	CALL	WRWORD
	CALL	RDBYTE
	POP	B
	RET
;
; Poke 1 byte to Apple 6502 address space
; ENTRY: DE = Address in Apple
; EXIT:	A = Data
;
POKE:	PUSH	B
	MOV	B,A
	MVI	C,POKE1BYTE
	CALL	WRBYTE
	CALL	WRWORD
	MOV	C,B
	CALL	WRBYTE
	POP	B
	RET
;
;----------------------------------------------------------------------
; The new stuff for MEXplus
;
; Data Carrier Detect Routine
;
DCDVEC:		CALL	RD$MODSTAP	;read SSC status port
		ANI	CTSMSK		;isolate carrier bit
		JNZ	NOCARR		;0=carrier detected
		CMA			;make it 0ffh
		RET			;
NOCARR:		XRA	A		;make it 0
		RET 			;
;
; Ring Detect Routine
;
RNGVEC:		JMP	DCDVEC		;overlay doesn't know
;
;----------------------------------------------------------------------
;
; This routine sends a timed Break to modem from SSC card.
;
SENDBRK:CALL	RD$MODCMDP	;get current command status
	STA	CMDSV
	ORI	BRKMSK		;mask to make ACIA send BREAK
	CALL	WR$MODCMDP	;send command
	MVI	B,5
	MVI	C,TIMER		;wait 500 msecs
	CALL	MEX
	LDA	CMDSV		;get old command state
	CALL	WR$MODCMDP	;put it back
	RET
;
;.....
;
; You can add your own routine here to set DTR low and/or send a break
; tone to disconnect when exiting to CPM.
;
GOODBYE:	RET		;just return so exit to system
				;will not cause disconnect
;.....
;
; The following is used to initialize the SSC card for eight data bits,
; no parity, one stop bit, and baud=INITBAUD     
;
INITMOD:MVI	A,0BH		;default No Parity byte for ACIA
	STA	PARSV		;save it
	MVI	A,10H		;default 8 Data, 1 Stop Bits for ACIA
	STA	WRDSV		;save it
	MVI	A,INITBAUD      ;set to initial baud equate
	JMP	PBAUD		;let PBAUD setup ACIA
;
; This is the secondary entry used by the overlay to set baud,
; parity, and stop bit parameters of ACIA.
;
INITMOD1:
	LDA	PARSV		;get current parity byte
	ORI	0BH		;enable DTR, RECV IRQ, and RTS
	STA	CMDSV		;save byte for other uses
	CALL	WR$MODCMDP	;send to command port
	PUSH	H
	LXI	H,BAUDSV	;get address of current baud byte
	LDA	WRDSV		;get current word length byte
	ORA	M		;put 'em together
	STA	CTLSV		;...and save for other uses
	POP	H
	CALL	WR$MODCTLP	;now send to control port
	RET
;
CMDSV:	DB	0		;temporary storage
CTLSV:	DB	0		;temporary storage
;
;.....
;
; This routine drops DTR to force modem to disconnect.  Does NOT do
; any initialization.
;
DISCON:	CALL	RD$MODCMDP	;get current command status
	STA	CMDSV		;save it
	MVI	A,DISCB		;get disconnect byte (drops DTR)
	CALL	WR$MODCMDP	;send to ACIA
	MVI	B,10
	MVI	C,TIMER		;wait 1 second
	CALL	MEX
	LDA	CMDSV		;get back command status
	CALL	WR$MODCMDP	;put it back in ACIA register
	MVI	B,10
	MVI	C,TIMER		;wait another second
	CALL	MEX
	RET			;back to program
;
;.....
;
; This routine changes the modem baud rate with phone list entry
;
; Set baud-rate code in A (if supported by your modem overlay).  PMMI
; supports only five rates, which are validated here. NOTE: this routine
; (ie, the one vectored through NEWBDV) should update MSPEED with the
; passed code, but ONLY if that rate is supported by the hardware.
;
PBAUD:	PUSH	H		;don't alter anybody
	PUSH	D
	PUSH	B
	MOV	E,A		;code to DE
	MVI	D,0
	LXI	H,BAUDTB	;offset into table
	DAD	D
	MOV	A,M		;fetch code
	ORA	A		;0 means unsupported code
	JZ	PBEXIT		;exit if so
	STA	BAUDSV 		;good rate, save it for INITMOD1
	CALL	INITMOD1	;set baud (and PSW)
	MOV	A,E		;get speed code back
	STA	MSPEED		;make it current
	JMP	PBEXIT + 1	;jump error flag set
PBEXIT:	STC			;set return error for STBAUD caller
	POP	B		;all done
	POP	D
	POP	H
	RET
;
; Table of baud rate parameters for supported rates
;
BAUDTB:	DB	03H,06H,0,07H,0		;110,300,450,610,710
	DB	08H,0AH,0CH,0EH,0FH	;1200,2400,4800,9600,19200
BAUDSV: DB	06H			;current baud byte
;
;.....
;
; Sign-on message
;
SYSVER:	LXI	D,VERMSG
	MVI	C,PRINT
	CALL	MEX
	RET
;
;.....
;
; Newline on console
;
CRLF:	MVI	A,CR
	CALL	TYPE
	MVI	A,LF		;fall into TYPE
;
; type char in A on console
;
TYPE:	PUSH	H		;save 'em
	PUSH	D
	PUSH	B
	MOV	E,A		;align output character
	MVI	C,CONOUT	;print via MEX
	CALL	MEX
	POP	B
	POP	D
	POP	H
	RET
;
;----------------------------------------------------------------------
;
; The remainder of this overlay implements a very versatile SET command
; -- if you prefer not to write a SET for your modem, you may delete the
; code from here to the END statement. Control is passed here after
; MEX parses a SET command.
;
;
SETCMD:	MVI	C,SBLANK	;any arguments?
	CALL	MEX
	JC	SETSHO		;if not, go print out values
	LXI	D,CMDTBL	;parse command
	CALL	TSRCH		;from table
	PUSH	H		;any address on stack
	RNC			;if we have one, execute it
	POP	H		;nope, fix stack
SETERR:	LXI	D,SETEMS	;print error
	MVI	C,PRINT
	CALL	MEX
	RET
;
SETEMS:	DB	CR,LF,'SET command error',CR,LF,'$'
;
; SET command table ... note that tables are constructed of command-
; name (terminated by high bit=1) followed by word-data-value returned
; in HL by MEX service processor LOOKUP.  Table must be terminated by
; a binary zero.
;
; Note that LOOKUP attempts to find the next item in the input stream
; in the table passed to it in HL ... if found, the table data item is
; returned in HL; if not found, LOOKUP returns carry set.
;
CMDTBL:	DB	'?'+80H			;"set ?"
	DW	STHELP
	DB	'BAU','D'+80H		;"set baud"
	DW	STBAUD
	DB	'PS','W'+80H		;"set PSW"
	DW	STPSW
	DB	'TON','E'+80H		;'set TONE/PULSE byte to 'T'
	DW	STTONE
	DB	'PULS','E'+80H		;'set TONE/PULSE byte to 'P'
	DW	STPULSE
	DB	0			;<<=== table terminator
;
; SET <no-args>: print current statistics
;
SETSHO:	LXI	H,SHOTBL	;get table of SHOW subroutines
SETSLP:	MOV	E,M		;get table address
	INX	H
	MOV	D,M
	INX	H
	MOV	A,D		;end of table?
	ORA	E
	RZ			;exit if so
	PUSH	H		;save table pointer
	XCHG			;adrs to HL
	CALL	GOHL		;do it
	CALL	CRLF		;print newline
	MVI	C,CHEKCC	;check for console abort
	CALL	MEX
	POP	H		;it's done
	JNZ	SETSLP		;continue if no abort
	RET
;
GOHL:	PCHL
;
; Table of SHOW subroutines
;
SHOTBL:	
	DW	BDSHOW		;displays current baud
	DW	PSWSHOW		;displays current PSW
	DW	TPSHOW		;displays current TPULSE byte (0105H)
	DW	CRLF
	DW	0		;<<== table terminator
;
; SET ?  processor
;
STHELP:	CALL 	CLS			;clear screen
	LXI	D,HLPMSG
	MVI	C,PRINT
	CALL	MEX
	RET
;
; The help message
;
HLPMSG:	DB	CR,LF,'SET Commands available are:',CR,LF,LF
	DB	'SET BAUD  <110, 300, 600, 1200, 2400, 4800,'
	DB	' 9600, or 19200>',CR,LF
	DB	'SET PSW   <8N1, 7E1, 7O1, or 7N1> -- Word Length,'
	DB	' Parity, Stop Bits',CR,LF
	DB	'SET TONE  (Sets flag for TONE  dialing)',CR,LF
	DB	'SET PULSE (Sets flag for PULSE dialing)'
	DB	CR,LF,LF,'$'
;
; SET BAUD processor
;
STBAUD:	MVI	C,BDPARS	;function code
	CALL	MEX	
	JC	SETERR		;invalid code
	CALL	PBAUD		;try to set it
	JC	SETERR		;unsupported code
BDSHOW:	CALL	ILPRT		;display baud
	DB	'Baud rate:',TAB,' ',0
	LDA	MSPEED
	MVI	C,PRBAUD	;use MEX routine
	CALL	MEX
	RET
;
; SET PSW processor
;
STPSW:	MVI	C,SBLANK
	CALL	MEX
	JC	SETERR		;SET PSW should have had argument
	LXI	D,PSWTBL	;look for PSW match in table
	CALL	TSRCH
	JC	SETERR		;not there, so report error
	CALL	FIXPSW		;routine to set PARSV and WRDSV
	CALL	INITMOD1	;now fix ACIA registers
;
PSWSHOW:
	CALL	ILPRT
	DB	'PSW setting:',TAB,' ',0
	LDA	PSWSET
	CPI	P8N1
	JNZ	PSW1
	CALL	ILPRT
	DB	'8N1',0
	RET
PSW1:	CPI	P7E1
	JNZ	PSW2
	CALL	ILPRT
	DB	'7E1',0
	RET
PSW2:	CPI	P7O1
	JNZ	PSW3
	CALL	ILPRT
	DB	'7O1',0
	RET
PSW3:	CPI	P7N1
	JNZ	PSW4
	CALL	ILPRT
	DB	'7N1',0
	RET
PSW4:	CALL	ILPRT
	DB	'<< ERROR >>',0
	RET
;
;
PSWSET:	DB	010H		;storage and default (8N1)
PARSV:	DB	0BH		;storage and default (no parity)
WRDSV:	DB	010H		;storage and default (8 data, 1 stop bits)
;
FIXPSW:	MOV	A,L		;PSW byte from table
	STA	PSWSET		;save it
	ANI	0F0H		;mask for word length bits
	STA	WRDSV		;put in storage
	LDA	PSWSET		;get back PSW byte
	ANI	0FH		;mask for parity bits
	RLC			;first shift into upper nibble..
	RLC			;...away we go...
	RLC			;.....and go...
	RLC			;......and done
	ORI	0BH		;mask needed for ACIA command register
	STA	PARSV		;put in storage
	RET
;
PSWTBL:	DB	'8N','1'+80H
	DW	P8N1		;filled in with equ's
	DB	'7E','1'+80H
	DW	P7E1		; - ditto -
	DB	'7O','1'+80H
	DW	P7O1		; - ditto -
	DB	'7N','1'+80H
	DW	P7N1		; - ditto -
	DB	0		;<<==== table terminator
;
;.....
;
; These routines set TPULSE flag at 0105H to either 'T' or 'P' so that
; MODEM (specifically MXO-SM13.ASM) overlay will dial in TONE or PULSE
; mode.  The settings are mutually exclusive.
;
STTONE:	MVI	A,'T'		;get T flag
	STA	TPULSE		;put into proper place
	JMP	TPSHOW		;display dial mode
;
STPULSE:
	MVI	A,'P'		;get P flag
	STA	TPULSE
;
TPSHOW:	CALL	ILPRT
	DB	'Dial Mode:',TAB,' ',0
	LDA	TPULSE
	CPI	'T'
	JNZ	TP1
	CALL	ILPRT
	DB	'TONE',0
	RET
TP1:	CPI	'P'
	JNZ	TP2
	CALL	ILPRT
	DB	'PULSE',0
	RET
TP2:	CALL	ILPRT
	DB	'<< ERROR >>',0
	RET
;
;......
;
; Compare next input-stream item in table @DE; CY=1 if not found,
; else HL = matched data item
;
TSRCH:	MVI	C,LOOKUP	;get function code
	JMP	MEX		;pass to MEX processor
;
; Print in-line message ... blows away C register
;
ILPRT:	MVI	C,ILP		;get function code
	JMP	MEX		;go do it
;
;
;	>>>>   End of MXH-APnn   <<<<