SUBJECT :  IMP overlay list

FROM	:  Irv Hoff

DATE	:  01 May 86


	IMP is the first (and currently the only) modem program that
takes advantage of the automatic 1k protocol offered by XMODEM 112 and
higher, and any KMD program (a replacement for XMODEM).  It also is one
of the few programs to use the automatic stepdown feature of the new
2400 bps modems to adjust the computer speed to match that of the an-
swering system.  (The US Robotics only steps down from 2400 to 1200,
not to 300.  The Paradyne ARK, Racal-Vadic 2400, Hayes 2400 and others
automatically stepdwon from 2400 to 1200 to 300.  IMP takes full advan-
tage of this feature.)

	At the bottom of this note is a list of the overlays that are
currently available for the IMP modem program.

	There are a number of options which the user may select to cus-
tomize IMP to suit his needs.  As with nearly any program, there may be
things you "wish you could do".  We tried to cover many of those, while
still keeping the overlays as short and simple as possible for "most of
the users".  An attempt was made to include enough features to allow
the sophisticated user enough tools to write his own routines if/where
appropriate, in the overlay.

	Read the IMP.CUS file for notes on how to select/use some of the
features offered in each IMP overlay.  (Such as changing the lead-in
character for the local commands while in the terminal mode to something
other than ESC, etc.)


			CURRENT IMP OVERLAYS
			--------------------

I2A2	Apple //c with various cards
I2A3	Apple ///
I2AC	Actrix computer  (Dart at 5.0688 MHz)
I2AD	Advanced Digital Super Six  (Z80 Dart and 8116)
I2AM	Ampro "Little Board"  (Z80 Dart and 8430 CTC timer)
I2AP	Apple //e  (2651 for CCP and 6551 for SSC)
I2B2	Big Board II (Z80 SIO and 8430 CTC timer)
I2BW	Bondwell 12/14 (Z80 SIO and 8253 baudrate generator
I2C8	Commodore C128 (no serial port, special handling)
I2CC	CCS 2719 and CCS 2830  (Z80 Dart and 8430 CTC timer)
I2CP	CompuPro interfacer 3/4  (2651 w/baudrate generator)
I2DM	Dynabye Monarch (Z80 SIO and 8116 baudrate generator)
I2DP	Datapoint 1560	(8251A and 8430 CTC timer)
I2DV	Datavue 3000  (Z80 SIO and 8430 CTC timer)
I2EA	Eagle II and III  (Z80 SIO and 8430 CTC timer)
I2EP	Epson QX-10  (Z80 SIO and Intel 8253)
I2EQ	Insight Enterprises EQ-4  (Z80 SIO and 8116 baudrate generator)
I2H8	Heath/Zenith 89  (8250 w/baudrate generator)
I2HZ	Heath/Zenith 100 series  (2661, w/baudrate generator)
I2KP	Kaypro with external modem  (Z80 and 8116 baudrate generator)
I2LO	Lobo MZX-80  (Z80 SIO and 8116 baudrate generator)
I2MC	Molecular Series X  (Z80 Dart and 8430 CTC timer)
I2MD	Morrow MD3  (8251 and 8254-2 baudrate generator)
I2MDA	Morrow MD3 (old, new, disk - 8251, etc.)
I2ME	Morrow MD5/MD11 (Z80 SIO)
I2MO	Morrow MD3 (older units, 8251, no baudrate generator)
I2MT	Memotech SDX-512 (Z80 Dart and 8430 CTC timer)
I2NA	North Star Advantage (8251)
I2NH	North Star Horizon, standard, no baudrate generator (8251)
I2NS	North Star Horizon  (8251 and HSIO-4 serial board)
I2OS	Osborne OS-1 computer (6850 ACIA)
I2OV	Osborne Vixen  (8251 and 8155 baudrate generator)
I2OX	Osborne Executive  (Dart and Intel 8253 baudrate generator)
I2R4	TRS-80 Model 4 with Montezuma Micro  (TR1602 and BR19411)
I2S2	Sanyo 1200/1250 (8251 no baudrate generator)
I2SB	Intertec Super Brain (8251 and BR1941 baudrate generator)
I2SS	CompuPro System Support 1  (2651 w/baudrate generator)
I2SY	Sanyo 1000/1100/1200/1250 (8251 no baudrate generator)
I2TV	TeleVideo 802/803  (SIO and 8430 CTC timer)
I2US	US Robotics S-100 plug in modem (8251 no baudrate generator)
I2VI	Visual 1050 (8251 and 8253 ?? baudrate generator ??)
I2XE	Xerox 820  (SIO and 8116 baudrate generator)
I2ZB	Zorba  (8251A and 8254-2 baudrate generator)
;
;
I2PR	(overlay to adapt Penril 1200-AD modem to IMP)
I2RV	(overlay to adapt Racal-Vadic autodial 3451 or 212PA modems)
I2VB	(overlay for 300/1200 modems that only have verbose mode,
	   such as the AVATEK.

	Others will be added as they are developed.  If you have a
	computer not already mentioned, you can perhaps use one of
	the above that matches your I/O (such as Dart, SIO, 8251,
	etc.) by selecting the correct ports, etc.  Otherwise you
	can try calling me at the below voice number from 10 am to
	midnight Pacific, and perhaps we can get something for you
	to use (then add it to this list for others).

					- Irv Hoff
					  Los Altos Hills, CA
					  (415) 948-2166