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- This is to announce version 4.03 of CP/M-80 Kermit. This is a "beta test"
- of a major new release, and will not replace the current version (3.9A),
- until it has proven to be stable.
-
- The major change is the decomposition of the program into a collection of
- modules, a`la MDMxxx, with a new procedure that allows combining custom
- "configuration overlays" with the system-independent portions of the program.
- This allows fixes or new features to be added to the protocol without requiring
- reassembly of the program for each system supported, and conversely, allows
- support for new systems to be added (or old ones fixed) without reassembly for
- the other systems. An added benefit of the breakup of the old monolithic
- source file into smaller files is managability on systems with limited disk
- storage -- at 176K, the version 3.9A source file exceeded the capacity of many
- common floppies.
-
- The modular decomposition is not quite complete, however, since the system-
- dependent code for all systems is still combined in one module, with
- assembly time conditionals for each system. A future release will break
- this module, CP4SYS.ASM, into separate, unconditionalized modules for each
- system.
-
- Here are some of the new features of version 4:
-
- * New systems:
-
- Support has been added for several new systems or configurations:
-
- Apple II, Z80 Softcard, 6551 ACIA
- BigBoard II
- CPT-85xx word processer
- Digicomp Delphi 100
- Morrow Micro Decision I
-
- However, support that was recently added to version 3 of CP/M Kermit for
- systems like the Heath H8 and Compupro Interfacer 3/4 is not included;
- volunteers are needed to do the conversions.
-
- * Terminal support:
-
- For micros without integral consoles, one of several terminals may be
- chosen (among them VT100, VT52, and ADM-3A), as well as the generic "CRT".
-
- * Debugging aids:
-
- SET DEBUG ON will add two fields to the SEND/RECEIVE display, labelled "Spack"
- and "Rpack". These display the last packet sent or received. Of course, this
- slows down the transfer, especially if the console is an external terminal.
- SET DEBUG OFF removes these fields.
-
- The VERSION command displays the name, edit number, and edit date of several
- of the modules that make up Kermit.
-
- * TAC support:
-
- ARPAnet TACs (and probably some other communication devices like modems,
- multiplexers, port contention units) use a printing character (normally "@") as
- an intercept character, to allow commands to be issued to the TAC. In order to
- send this character to the host, it must be typed twice. The command "SET TAC
- CHARACTER" to Kermit enables the TACtrap and asks the user to specify the TAC
- intercept character. This character will be automatically doubled when it
- appears in Kermit protocol messages (sent by the SEND or RECEIVE commands) or
- when it appears in a file being sent with the TRANSMIT command. It is not
- automatically doubled when typed by the user in CONNECT mode. "SET TAC ON"
- enables the TACtrap but does not change the TAC intercept character, which is
- initially "@". "SET TAC OFF" disables the TACtrap.
-
- * File buffering:
-
- Previous versions of Kermit-80 buffered only one sector (128 bytes) at a time
- during file transfer operations. This version buffers 16Kbytes at a time,
- reducing the number of times the floppy drive must be spun up and down, and
- increasing the effective throughput of the link. If the disk transfer rate
- is too slow, howver, the remote Kermit may time out and retransmit packets.
- This will show up on the screen in the "Retries:" field; if this occurs after
- disk activity, you may want to increase the timeout value on the remote
- Kermit, or reassemble Kermit with a smaller value for MAXSEC (in CP4SYS.ASM).
- This buffer is also used by the TRANSMIT command; the log file enabled by
- the LOG command is still written a sector at a time.
-
- * Baud Rate Setting:
-
- The format of the SET BAUD-RATE command has been changed for several systems.
- Rather than requesting the user to enter a letter for the speed, the desired
- baud rate is supplied on the command line (e.g. "SET BAUD 1200"). A list
- of supported baud rates may be obtained by typing "SET BAUD ?". If Kermit
- cannot change the baud rate for your system, it will reply "(not implemented)".
-
- * Generic CP/M 2.2 Support:
-
- The "generic" Kermit-80 for CP/M 2.2 (assembly switch GENER) supports six
- port selections, to improve the chances of finding one that works. Kermit
- reads from PTR: and writes to PTP: by default; if this does not work, try
- "SET PORT TTY". The following table lists the CP/M devices used for each
- option:
-
- SET PORT xxx input from output to
- CRT CRT: CRT:
- PTR PTR: PTP:
- TTY TTY: TTY:
- UC1 UC1: UC1:
- UR1 UR1: UP1:
- UR2 UR2: UP2:
-
- In all cases, the console (CON:) and list (LST:) devices used are those
- selected when Kermit is started.
-
- * How to Get It:
-
- The files are in KER:CP4*.* on CU20B, available via anonymous FTP. CU20B is
- Internet host [192.5.43.128]. The source files have the extension (file type)
- .ASM, the hex files .HEX. There is also a new Kermit User Guide chapter in
- KER:CP4KER.DOC and .MSS (Scribe text formatter source). A list of known bugs
- and deficiencies is in KER:CP4KER.BWR (this file will be updated as reports
- come in).
-
- Note that a new, somewhat more complicated, installation procedure is required.
- Two hex files -- the system-dependent part, and the "configuration overlay" --
- must be combined and then loaded. Detailed instructions are given in
- KER:CP4KER.DOC.
-
- The program may be built with the public-domain assembler and linker,
- LASM and MLOAD, or on the DEC-10 or DEC-20 with Bruce Tanner's MAC80 and
- LINK80. Unfortunately, it can no longer be built with ASM and LOAD because
- multiple files are used (this is the price we pay for modularity).
- LASM, MLOAD, MAC80, and LINK80 are all in the <KERMIT-TOOLS> area on CU20B,
- for those who need them. <KERMIT-TOOLS> can be referred to as KT:, as in
- KT:MLOAD.HEX.
-
- The following systems are supported:
-
- Symbol Filename System
- ------ -------- ------
- AP6551 CP4APL Apple II, Z80 Softcard, 6551 ACIA in serial interface
- APMMDM CP4APM Apple II, Z80 Softcard, Micromodem II in slot 2
- BBII CP4BB2 BigBoard II (terminal required)
- BRAIN CP4BRN Intertec SuperBrain.
- CPM3 CP4CP3 "generic": CP/M 3.0 (CP/M Plus) systems (terminal req'd)
- CPT85XX CP4CPT CPT-85xx word processors with CompuPak CP/M
- DELPHI CP4DEL Digicomp Delphi 100 (terminal required)
- DMII CP4DM2 DECmate II with CP/M option
- GENER CP4GEN "generic": CPM 2.2 systems with IOBYTE (terminal req'd)
- HEATH CP4H89 Heath/Zenith H89.
- KPII CP4KPR Kaypro-II (and 4; probably supports all Kaypro systems)
- MDI CP4MDI Morrow Decision I (terminal required)
- MIKKO CP4MIK MikroMikko
- MMDI CP4UDI Morrow Micro Decision I (terminal required)
- OSBRN1 CP4OSB Osborne 1
- OSI CP4OSI Ohio Scientific
- ROBIN CP4ROB DEC VT180
- TELCON CP4TEL TELCON Zorba portable
- TRS80LB CP4TLB TRS-80 model II with Lifeboat 2.25C CP/M Display
- TRS80PT CP4TPT TRS-80 model II with Pickles + Trout CP/M Display
- VECTOR CP4VEC Vector Graphics.
- Z100 CP4Z00 Z-100 under CP/M-85
-
- The "symbol" is used in CP4SYS.ASM for assembly purposes. The filename
- shows where to find the .HEX file in KER: on CU20B, e.g. KER:CP4Z00.HEX.
-
-
- Please try out the new version and report any bugs to Info-Kermit@CU20B.
- Also, please feel free to add support to CP4SYS.ASM for systems that are
- not supported, and to make enhancements to those that are; for instance,
- most systems are still not able to send a 250ms BREAK signal.
-
- Version 3.9A of CP/M-80 Kermit continues to be available as KER:CPM*.*
- on CU20B, but will eventually be phased out.
-