To transfer files to and from my Grant Searle based
CPM computer, I started using DOWNLOAD.COM and Grants
windows application for creating compatible "packages".
But, this was tedious, and very error-prone. So I looked
for a better solution, and found one that works for me at
http://oldcomputer.info/others/z80sbc/index.htm

Using the C-Kermit package linked there, along with
standard ckermit on Linux, I have a much more reliable
and convenient way of getting data to and from the CP/M machine.

I use the second serial port of the CP/M machine's SIO/2
attached to a USB serial adapter on the Linux host.

A typical session, involves typing up the assembly code,
then using the crasm assembler to produce an Intel HEX file.
The Hex file gets transferred to the CP/M system "raw":

On the CP/M side I start Recieving of file using:
D> KERMIT
Kermit-80 v4.11 configured for Generic CP/M-80 with Generic (Dumb) CRT Terminal type selected 

For help, type ? at any point in a command
Kermit-80   0D:>SET PORT PTR
Kermit-80   0D:>R


On the Linux side I set up the Sending using:
jonlan@JL-X260:~/Code/z80cpm$ kermit
C-Kermit 9.0.302 OPEN SOURCE:, 20 Aug 2011, for Linux+SSL+KRB5 (64-bit)
 Copyright (C) 1985, 2011,
  Trustees of Columbia University in the City of New York.
Type ? or HELP for help.
(/home/jonlan/Code/z80cpm/) C-Kermit>
(/home/jonlan/Code/z80cpm/) C-Kermit>set modem type none  
(/home/jonlan/Code/z80cpm/) C-Kermit>set line /dev/ttyUSB1
(/home/jonlan/Code/z80cpm/) C-Kermit>set carrier-watch off
(/home/jonlan/Code/z80cpm/) C-Kermit>set speed 115200
(/home/jonlan/Code/z80cpm/) C-Kermit>set flow rts/cts     
(/home/jonlan/Code/z80cpm/) C-Kermit>s file.hex


Finally, back on the CPM host, the HEX file is converted to a
loadable COM file using the CP/M 2.2 LOAD.COM utility:

D>A:LOAD FILE


Cut-and-paste friendly settings for C-Kermit:
CP/M side

set port ptr

Linux side


set modem type none  
set line /dev/ttyUSB1
set carrier-watch off
set speed 115200
set flow rts/cts