20 years, and over 400 scanner drivers

August 24th, 2018

Quite exactly 20 years ago I purchased my first scanner, after saving for years for my first computer: A Pentium 120, at first even running with our old ISA VGA card from my farther’s ageing 386sx25. Lafter, after saving more for my first VGA card, an ELSA Victory 3D w/ S3/Virge3D, it was also time for the first peripherals and of course to get analog material into the digital world I needed a scanner: a c’t mgazine well rated AVision AV630CS. But as Windows crashed too often than not on me, it was also time to migrate to Linux. Remember that was 1998 when few actually heard about it. And of course I had to write my own SANE scanner driver - and the rest is history:


[self note:@”gdb”];

August 11th, 2018

set solib-search-path ./lib64
# or: set solib-absolute-prefix ./lib64
file usr/bin/something
core-file core

Bluetooth apt-X finally works w/ OpenSource!

June 6th, 2018

I also finally hcidump’ed which codecs my Sennheiser Momentum 2.0 supports, as the marketing material is often not that detailed and trustworthy. So besides the standard SBC; only apt-X:

# hcidump | grep -i codec
Media Codec - non-A2DP (aptX)
Media Codec - SBC
Media Codec - non-A2DP (aptX)

CLI, manual Bluez connection

June 4th, 2018

# bluetoothctl

power on
agent on
scan on
pair xx:…
connect xx:…

Notes. installing Irix, Octane, O2

April 21st, 2018

Empty HD:

boot -f dksc(1,3,8)sash64
# boot -f dksc(1,3,8)sashARCS

boot -f dksc(1,3,7)stand/fx.64 –x
# boot -f dksc(1,3,7)stand/fx.ARCS –x

Install System Software

2 to open media
# insert all CDs

then to install:

keep *
install standard

in case of conflicts:

conflict 1a 2a .. .. ..

Obviously, more detailed tips at the usual: nekochan.net, …

The best Kritharaki receipe

April 9th, 2018

- Zwiebel mit 250g Mett anbrutzeln
- kleine oder halbe Zucchini
- 1, 2 Mönchen, schön klein scheiden
- Knoblauch, wenn man will
- Paprika
alles dazugeben und mit anbrutzeln, nicht zu viel
dann 1/4 Liter Wasser, Brühwürfel und Kritharaki direkt mit dazu
wenn es köchelt ein bisschen (mehr) Tomatenmark (ca. halbe Tube)
ca 15 Minuten kochen und
immer wieder gut umrühren, ggf. Wasser nachgießen
ggf. wenn man mag mit Sahne oder Schwand abschmecken
und/oder mit Feta (oder Mozzarella) Käse dekorieren

AT command notes

March 15th, 2018

so it is that time of the decade again, that you need to poke with some AT modem commands, e.g. for 3G / LTE networks, …

Does the SIM card need a PIN?

Enter the PIN if required:

Current network:

Update: special service numbers, e.g. balance:

List of early computing systems [WIP]

March 12th, 2018

I think we initially had a 286 without HD, nor color graphics
my father’s 386sx25 w/ 2MB RAM for what feels forever
gifted free NEC V20 XT clone thing
Pentium 120
IDT WinChip2 240
AMD K7 Athlon 600
AMD K7 Athlon 1GHz?
Sun Ultra 5 4/2002
Sgi Octane 11/2005
iBook G3 750?

GCC becomes slower and slower

January 18th, 2018

As visible on my other posts, also on twitter and instagram I’m working on some vintage machines with our #t2sde the other weeks. Now only did the new GCC versions feel slower and slower, where even EPYC datacenter servers took like twice as long to bootstrap some $sysroot, … I did a quick mips64 build and install to the R10000 mips64 Sgi Octane. A hello-world.c compile is like 20% slower from 4.9.4 to 7.2.0 (N32 user-land):

# gcc –version
gcc (GCC) 4.9.4
# time gcc hello.c
user 0m1.080s


# gcc –version
gcc (GCC) 7.2.0
# gcc hello.c
user 0m1.290s

glibc minimum linux kernel version

December 31st, 2017

Note to self:

glibc-2.13: at least 2.6.12… ok (mips64)
glibc-2.19: minimum kernel version reset to 2.6.16 (mips64)
glibc-2.21: at least 2.6.32 (mips64)

to be extended.

Also, turns out the FP NAN representation was recently changed for IEEE 754-2008 on MIPS around Linux kernel version 4.5.0, and glibc 2.23.

Update: On a similar note: GCC 4.4 now supports the MIPS R10K, R12K, R14K and R16K processors.

Update 2: i386 removed with Linux kernel 3.8, last glibc without NPTL for i386 LinuxThreads: 2.3.6?

Update 3: sparc32/sun4c removed with Linux kernel 3.5.