git.defcon.no Git - z80cpm/blob - kermit.txt

   1 To transfer files to and from my Grant Searle based
   2 CPM computer, I started using DOWNLOAD.COM and Grants
   3 windows application for creating compatible "packages".
   4 But, this was tedious, and very error-prone. So I looked
   5 for a better solution, and found one that works for me at
   6 http://oldcomputer.info/others/z80sbc/index.htm
   7
   8 Using the C-Kermit package linked there, along with
   9 standard ckermit on Linux, I have a much more reliable
  10 and convenient way of getting data to and from the CP/M machine.
  11
  12 I use the second serial port of the CP/M machine's SIO/2
  13 attached to a USB serial adapter on the Linux host.
  14
  15 A typical session, involves typing up the assembly code,
  16 then using the crasm assembler to produce an Intel HEX file.
  17 The Hex file gets transferred to the CP/M system "raw":
  18
  19 On the CP/M side I start Recieving of file using:
  20 D> KERMIT
  21 Kermit-80 v4.11 configured for Generic CP/M-80 with Generic (Dumb) CRT Terminal type selected
  22
  23 For help, type ? at any point in a command
  24 Kermit-80   0D:>SET PORT PTR
  25 Kermit-80   0D:>R
  26
  27
  28 On the Linux side I set up the Sending using:
  29 jonlan@JL-X260:~/Code/z80cpm$ kermit
  30 C-Kermit 9.0.302 OPEN SOURCE:, 20 Aug 2011, for Linux+SSL+KRB5 (64-bit)
  31  Copyright (C) 1985, 2011,
  32   Trustees of Columbia University in the City of New York.
  33 Type ? or HELP for help.
  34 (/home/jonlan/Code/z80cpm/) C-Kermit>
  35 (/home/jonlan/Code/z80cpm/) C-Kermit>set modem type none
  36 (/home/jonlan/Code/z80cpm/) C-Kermit>set line /dev/ttyUSB1
  37 (/home/jonlan/Code/z80cpm/) C-Kermit>set carrier-watch off
  38 (/home/jonlan/Code/z80cpm/) C-Kermit>set speed 115200
  39 (/home/jonlan/Code/z80cpm/) C-Kermit>set flow rts/cts
  40 (/home/jonlan/Code/z80cpm/) C-Kermit>s file.hex
  41
  42
  43 Finally, back on the CPM host, the HEX file is converted to a
  44 loadable COM file using the CP/M 2.2 LOAD.COM utility:
  45
  46 D>A:LOAD FILE
  47
  48
  49 Cut-and-paste friendly settings for C-Kermit:
  50 CP/M side
  51
  52 set port ptr
  53
  54 Linux side
  55
  56
  57 set modem type none
  58 set line /dev/ttyUSB1
  59 set carrier-watch off
  60 set speed 115200
  61 set flow rts/cts