SUBJECT :  IMP overlay list

FROM	:  Irv Hoff

DATE	:  06 June 87


	IMP is the first (and with the commercial TERM3 the only) modem
program that takes advantage of the automatic 1k protocol offered by
KMD and XMODEM.  It also uses the automatic stepdown feature of the 2400
bps modems to adjust the computer speed to match that of the answering
system.  (The US Robotics only steps down from 2400 to 1200, not to 300.
The Hayes 2400, Racal-Vadic 2400, Paradyne, Prometheus ProModem 2400 and
others automatically stepdown from 2400 to 1200 to 300.  IMP takes full
advantage of this feature.)

	IMP was originally written for exclusive use with the new 2400
bps modems.  It was later expanded to accept 1200 bps modems as well.
It never was intended for use with 300 baud modems.

	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
			--------------------

I218-4	SB180 MicroMint SB180  (Hitatchi 64180, similar to Z80)
I2A2-3	Apple //c with various cards
I2A3-3	Apple ///  (6551 with built-in baudrate generator)
I2AC-2	Actrix computer  (Dart at 5.0688 MHz and 8430 CTC timer)
I2AD-2	Advanced Digital Super Six  (Z80 Dart and 8116)
I2AL-3	Altos Series 8000 and Series 5	(Z80 Dart and 8430 CTC timer)
I2AM-4	Ampro "Little Board"  (Z80 Dart and 8430 CTC timer)
I2AP-10 Apple //e universal overlay  (2651 for CCP and 6551 for SSC)
I2AV-1	Apple //e PCPI Applicard with VERSAcard  (6850 ACIA)
I2B2-2	Big Board II  (Z80 SIO and 8430 CTC timer)
I2B3-2	Bondwell 2 laptop portable  (8251 and 8253 baudrate generator)
I2BT-4	Beehive Topper	(Z80 Dart and 8430 CTC timer)
I2BW-3	Bondwell 12/14	(Z80 SIO and 8253 baudrate generator
I2C8-2	Commodore C128	(no serial port, special handling)
I2CC-5	CCS 2719 and CCS 2830  (Z80 Dart and 8430 CTC timer)
I2CP-2	CompuPro interfacer 3/4  (2651 w/baudrate generator)
I2DA-2	Davidge DST3-4/6  (Z80 and 8430 CTC timer)
I2DG-2	Digital Group with IOP	(8251A and 8430 CTC timer)
I2DM-2	Dynabyte Monarch  (Z80 SIO and 8116 baudrate generator)
I2DP-2	Datapoint 1560	(8251A and 8430 CTC timer)
I2DV-2	Datavue 3000  (Z80 SIO and 8430 CTC timer)
I2EA-2	Eagle II and III  (Z80 SIO and 8430 CTC timer)
I2EP-2	Epson QX-10  (Z80 SIO and Intel 8253)
I2EQ-4	Insight Enterprises EQ-4  (Z80 SIO and 8116 baudrate generator)
I2FT-2	Facit DTC computers  (Z80 SIO and 8430 CTC timer)
I2H8-5	Heath/Zenith 89  (8250 w/baudrate generator)
I2HZ-6	Heath/Zenith 100 series  (2661B, w/baudrate generator)
I2KP-2	Kaypro with external modem  (Z80 SIO and 8116 baudrate gen.)
I2LO-2	Lobo MAX-80  (Z80 SIO and 8116 baudrate generator)
I2MC-2	Molecular Series X  (Z80 Dart and 8430 CTC timer)
I2MD-2	Morrow MD3  (8251 and 8254-2 baudrate generator)
I2MDA-3 Morrow MD3  (old; new; disk - 8251, etc.)
I2ME-3	Morrow MD5/MD11  (Z80 SIO)
I2MM-4	MicroMint SB180  (Hitachi HD64180 - similar to Z80)
I2MO-2	Morrow MD3  (older units, 8251, no baudrate generator)
I2MT-2	Memotech SDX-512  (Z80 Dart and 8430 CTC timer)
I2NA-3	North Star Advantage  (8251 and 8253 baudrate generator)
I2NC-2	NCR Decision Mate 5  (2661C w/baudrate generator)
I2NE-2	NEC 8801  (8251, no baudrate generator)
I2NH-3	North Star Horizon, standard, no baudrate generator  (8251)
I2NS-6	North Star Horizon  (8251 and HSIO-4 serial board)
I2OA-2  Otrona Attache  (Z80 SIO)
I2OS-5	Osborne OS-1 computer  (6850 ACIA)
I2OV-3	Osborne Vixen  (8251 and 8155 baudrate generator)
I2OX-2	Osborne Executive  (Dart and Intel 8253 baudrate generator)
I2R2-2	TRS-80 Model II/12  (Z80 SIO and 8430 CTC timer)
I2R4-2	TRS-80 Model 4 with Montezuma Micro  (TR1602 and BR19411)
I2S2-2	Sanyo 1200/1250  (8251 no baudrate generator)
I2SB-2	Intertec Super Brain  (8251 and BR1941 baudrate generator)
I2SD-2	SD Systems SBC-200  (8251 no baudrate generator)
I2SP-2	Coleco Adam with EVE SP-1 interface and ext. modem  (2651, gen)
I2SS-3	CompuPro System Support 1  (2651 w/baudrate generator)
I2SV-2	SVI-238  (8251 no baudrate generator)
I2SY-3	Sanyo 1000/1100/1200/1250  (8251 no baudrate generator)
I2TD-2  TurboDOS 1.4x  (?? and 8116 baudrate generator)
I2TS-2  Timex-Sinclair 2068  (8251 no baudrate generator)
I2TV-5	TeleVideo 801/802/804  (Z80 SIO and 8430 CTC timer) - [cont'd]
	  and TeleVideo 803/TPC-1  (Mostek 3801 and 8430 CTC timer)
I2US-1	US Robotics S-100 plug in modem  (8251 no baudrate generator)
I2VG-2	Vector Graphics 3 or 4	(8251 and 8253 baudrate generator)
I2VI-2	Visual 1050  (8251 and 8253 ?? baudrate generator ??)
I2WM-3	WaveMate Bullet  (Z80 Dart and 8430 CTC timer)
I2XE-2	Xerox 820  (Z80 SIO and 8116 baudrate generator)
I2ZB-2	Zorba  (8251A and 8254-2 baudrate generator)
;
;
I2RV-5	(overlay to adapt Racal-Vadic autodial 3451 or 212PA modems)
	   (Needed for IMP245, use I2RV-4.ASM for IMP244.)
I2VB-3	(overlay for 300/1200 modems that only have verbose mode,
	   such as the AVATEK.  (Needed for IMP245, use I2VB-2.ASM
	   for IMP244.)

	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

