Category Archives: experiment

Connecting SNES Controller to the Steckschwein

Posted on 15. January 2020 by

Recently, Michael Steil published a blog post about connecting NES and SNES Controller to a 6502-based system showing how to use NES and SNES controllers on a C64 without the need for any special hardware, by just connecting them to … Continue reading →

Posted in Allgemein, experiment, joystick

V9958 – “The WAIT” – investigation of the CPU/VDP /WAIT interface

Posted on 22. October 2018 by

… on the way back to munich, we had some time to do a little code review of our gfx library. thinking about the cpu to video chip timings and again read the well known datasheets of the V9938/V9958. suddenly … Continue reading →

Posted in 64k, 6502, 65c02, 9918, Allgemein, assembly, cpu, experiment, nop, steckschwein, timing, tms9929, V9958, vdp, video, video chip, waitstate

WOZMON – a memory monitor in 256 bytes

Posted on 22. July 2018 by

The woz monitor, also known as WOZMON, is a pretty simple memory monitor and was the system software located in the 256 byte PROM on the Apple I. Wozmon is used to inspect and modify memory contents or to execute … Continue reading →

Posted in debugging, experiment, hexdump, software

Mehr Mut: Es werde Code!

Posted on 12. February 2014 by

Nachdem uns nach einiger Zeit dann doch langweilig wurde, den Prozessor beim NOPs ausführen zu beobachten musste der nächste Kick her: Es soll Code ausführen! Also ein wenig Code geschrieben (dieser ist leider nicht überliefert, enthielt lediglich einige NOPs und … Continue reading →

Posted in code, experiment, urschleim

Am Anfang war das NOP

Posted on 12. February 2014 by

Wenn man 20 Jahre lang den Jugendtraum mit sich rumträgt, einen 8bit-Rechner selber zu bauen, dann hat man 20 Jahre Zeit, einzurosten. Langsames Rantasten an das große Ziel ist angesagt. In diesem Fall soll unser 65c02 erstmal nur NOPs ausführen … Continue reading →

Posted in experiment, nop, urschleim