Category Archives: assembly

Weird bug in SD card code

Posted on 16. October 2019 by

Frank van den Hoef, who is adapting the Steckschwein SPI & FAT32 code for his tiny65 machine made me aware of a classic mistake for a 6502 assembly coder to make. Namely in our sdcard driver, when waiting for the … Continue reading →

Posted in assembly, code, debugging, murphy, SD-Karte, SPI

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

VCFB 2018 It was great…

Posted on 13. October 2018 by

VCF 2018 in Berlin was great! We’ve met interesting people there. Got a handshake with Scot W. Stevenson who for(th)ced us to use his TaliForth2 😉 Later on Saturday Daniel Illgen – maintainer of the Adlib Tracker II for Linux – … Continue reading →

Posted in Allgemein, assembly, code, cpu, debugging, py65mon, quality, software, stackpointer, steckschwein, Steckschwein live, tests, unit tests