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SC131 Z180 CP/M Computer Questions

KenUnix

Member
Joined
Nov 26, 2022
Messages
30
I am the proud owner of a SC131 CP/M computer. I have a couple of questions.
Using minicom under Linux how would I transfer a .com file to the SC131?
Be as specific as possible.
If required I also have putty installed.

SC131 Boot messages follow:

RomWBW HBIOS v3.0, 2020-03-27

SC131 Z8S180-N @ 18.432MHz IO=0xC0
0 MEM W/S, 2 I/O W/S, INT MODE 2
512KB ROM, 512KB RAM

ASCI0: IO=0xC0 ASCI W/BRG MODE=115200,8,N,1
ASCI1: IO=0xC1 ASCI W/BRG MODE=115200,8,N,1
MD: UNITS=2 ROMDISK=384KB RAMDISK=384KB
SD: MODE=SC OPR=0x0C CNTR=0xCA TRDR=0xCB DEVICES=1
SD0: SDHC NAME=USD BLOCKS=0x01DC3000 SIZE=15238MB

Unit Device Type Capacity/Mode
---------- ---------- ---------------- --------------------
Char 0 ASCI0: RS-232 115200,8,N,1
Char 1 ASCI1: RS-232 115200,8,N,1
Disk 0 MD1: RAM Disk 384KB,LBA
Disk 1 MD0: ROM Disk 384KB,LBA
Disk 2 SD0: SD Card 15238MB,LBA

SC131 Boot Loader

ROM: (M)onitor (C)P/M (Z)-System (F)orth (B)ASIC (T)-BASIC (P)LAY (U)SER ROM
Disk: (0)MD1 (1)MD0 (2)SD0

Boot Selection?

=================================================================

I was asked about my handle KenUnix. That dates back to my Bell Telephone days
when I started working on AT&T Unix in the mid 1970's and just kept it.

Thanks for any help.
Ken
 
Using minicom with settings 115200 8N1 connect to the tty port. Mine shows up at /dev/ttyUSB0

Type 'c' at the boot prompt to enter CP/M. The CP/M on SC131 boots with two drives: RAM drive 'A', and ROM drive 'B'. ROM drive 'B' is the main drive with all the boot files, and may be write-protected using a jumper on the motherboard. My system is like this, so I can only write files to 'A' drive. The command "XM" is the xmodem program to transfer the file. To receive a file on the SC131 and put it on the writeable A drive:

1: At the B> prompt, type XM R A:FILE.COM to start the xmodem "receive" operation on the SC131

B> XM R A:FILE.COM

2: Type "ctrl-a" then "z" to pull up the minicom menu. Type "s" at the minicom menu to send a file from the computer.
3: Select "xmodem"
4: Select the file using 'goto' to go to the correct directory, 'space bar' to tag the file.
5: Select 'okay' and hit 'enter' to start transmission.

Then it ... might work! You have to select the file to send quickly (within about 15 seconds or less) or else it will error out. Good luck.
 
Last edited:
Thanks bsd64! That worked great.
All I need is some programs to download...
Executable types.

Ken
 
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