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0.4.99.99 is not the latest version. The latest version, to date that is 0/4/99/103, (sources) can be found on Guthub: https://github.com/OpenCBM/OpenCBM

The binary Windows download link for this version is https://spiro.trikaliotis.net/download/opencbm-0.4.99.103/opencbm-0.4.99.103.zip

Just for any confused newcomers ;)

opencbm-0.4.99.103.zip

Hi,
New to CBM scene, just getting started with C64 & 1541.

make -f LINUX/Makefile opencbm plugin-xa1541
builds but says nothing to be done for plugin-xa1541

make -f LINUX/Makefile install install-plugin-xa1541
...
install -m 755 ..//LINUX/plugin_helper_tools /usr/local/bin/opencbm_plugin_helper_tools
mark that there is no default plugin yet.
..//LINUX/plugin_helper_tools setdefaultplugin "/etc" 00opencbm.conf ""
------ setting new default to: ''.
...

/sbin/modprobe cbm
/sbin/insmod cbm
no such file or directory

find -name cbm.o
./opencbm/compat/cbm.o
./opencbm/lib/cbm.o

Seems I ma missing xa1541 plugin?
Many thanks
Tomas

@Spiro, I plan to build XM1541 one, is just four diodes.

It is VIA chipset.
[ 19.935433] parport_pc: VIA 686A/8231 detected
[ 19.935441] parport_pc: probing current configuration
[ 19.935463] parport_pc: Current parallel port base: 0x378
[ 19.935616] parport0: PC-style at 0x378, irq 7 [PCSPP,EPP]
[ 20.032711] parport_pc: VIA parallel port: io=0x378, irq=7
[ 23.336040] ppdev: user-space parallel port driver

uname -a
Linux lynx 4.19.0-8-686-pae #1 SMP Debian 4.19.98-1 (2020-01-26) i686 GNU/Linux

make -f LINUX/Makefile plugin-xa1541a
make: Nothing to be done for 'plugin-xa1541

opencbm-0.4.99.103$ ls
cbm4wingui gui4cbm4win.vb6.old opencbm README-OSX.txt xu1541 xum1541cfg
dirs LINUX README.md windrv xum1541

no xa1541 directory in the source

ii linux-headers-4.19.0-13-686-pae 4.19.160-2
ii linux-headers-4.19.0-8-686-pae 4.19.98-1+deb10u1

there was header mismatch
Apologies for the confusion

make -f LINUX/Makefile install install-plugin-xa1541
...
install -m 644 [ -f cbm.ko ] && echo cbm.ko || echo cbm.o /lib/modules/4.19.0-8-686-pae/kernel/drivers/char
install -d -m 755 /etc/udev/rules.d/
install -m 644 45-opencbm-xa1541.rules /etc/udev/rules.d/
...
depmod -a
make[1]: depmod: Command not found
make[1]: [LINUX/Makefile:36: install] Error 127 (ignored)
...

/sbin/modprobe cbm
cbm.ko not found in directory /lib/modules/4.19.0-8-686-pae

/sbin/insmod cbm
insmod: ERROR: could not load module cbm: No such file or directory

...
$ find -name cbm.ko
./opencbm/sys/linux/cbm.ko

/sbin/insmod ./opencbm/sys/linux/cbm.ko

actually no physical connection yet, just testing to load module, taking a long time to load

[ 2971.564018] cbm: loading out-of-tree module taints kernel.
[ 2971.564285] cbm: module verification failed: signature and/or required key missing - tainting kernel
[ 2971.581242] cbm_init: using passive (XM1541) cable (auto), irq 7
[ 2971.581249] cbm: resetting devices
[ 2971.684562] cbm: waiting for free bus...
[ 2983.668541] cbm: quitting because of timeout

$ lsmod | grep cbm
cbm 20480 0
parport 40960 3 cbm,parport_pc,ppdev

Apologies for the confusion

--> actually no physical connection yet, just testing to load module, taking a long time to load

This is normal without a cable. The driver tries to reset a floppy. It resets it and waits for the reaction of the floppy. If there is none connected, it will stay there until a timeout occurs ("cbm: quitting because of timeout")

But why is cbm.ko missing at the right location? What does find /lib/ -iname cbm.ko show?

depmod should be in the Debian package named 'kmod'.

Please by careful with the diodes for the XM1541 cable, use only recommended ones as written on http://sta.c64.org/xm1541.html and http://sta.c64.org/xm1541c.html.

$ find /lib/ -iname cbm.ko
/lib/modules/4.19.0-8-686-pae/kernel/drivers/char/cbm.ko

/sbin/depmod on the system, so are incmod, modrobe

depmod was not run during install as it needs be given /sbin path explicitly as system binary
probably
...
see above

modprobe looks inside /lib/modules/4.19.0-8-686-pae/ by default

by running /sbin/depmod manually we got entries in

4.19.0-8-686-pae$ grep cbm modules.alias
alias char-major-10-177 cbm
alias opencbm cbm

and
4.19.0-8-686-pae$ grep cbm modules.dep
kernel/drivers/char/cbm.ko: kernel/drivers/parport/parport.ko

@Spiro
Many thanks so far, will use 4x1N5819
-->Please by careful with the diodes for the XM1541 cable, use only recommended ones

could be something wrong with my deb setup, as /sbin is not searched
$ /sbin/modprobe cbm
modprobe: ERROR: could not insert 'cbm': Operation not permitted

$ id
....100(users),...

$ cat /etc/udev/rules.d/45-opencbm-xa1541.rules
ACTION!="add", GOTO="opencbm_plugin_xa1541_rules_end"
# xa1541/xm1541 parallel port driver
KERNEL=="cbm", GROUP="users", MODE="0664"

LABEL="opencbm_plugin_xa1541_rules_end"

/sbin/modprobe cbm still requires root privileges

perhaps need to rebuild initrd.img ?