In general, IC orientation is designated by the notch in the centre on one end of the IC. (Don't make assumptions based on the text direction, although typically it will flow left to right from the notched side.)
And yes, typically, board designers will orient ICs in the same direction(s); but again, don't make assumptions.
On the PCB, the notch is typically ...
The only way to detect an emulator that doesn't use emulator ID (all modern ones) is to exploit a difference between that emulator and real hardware. This only works until the emulator gets fixed.
Writing such code is useful only insofar as it helps emulators improve, by providing a test case.
The floating line test has false positives when used to detect ...
It’s good ol’ buffer overflow.
I diagnosed this in VICE. It turns out that supercat’s hunch that this is caused by clobbering a register of the CIA chip is mostly correct (they only got the register wrong), though the cause is relatively easily discovered even without that hint.
Since the primary symptom is the keyboard becoming unresponsive, I decided to ...
Most — if not all — CSDB demos expect a PAL C64. VICE or TheC64 (which should be referred to as “Hall of Shame VICE”) typically start up as NTSC.
This demo seems to run adequately in VICE 3.5 for me when invoked with:
x64sc --model pal KRESTAGE3.D64
And now this: disk drive outputs the video signal through the serial bus connector!
"Freespin" Demo by Matthias Kramm (Quiss/Reflex):
Technical details are described on the author's website:
Every single raster line, we have generate sync pulse by pulling both
DATA and CLK ...
The c0pperdragon C64 Component Video Mod outputs YPrPb (Component Video) via RCA jacks, then the Retrotink Comp2RGB adapter converts that to RGBS over SCART.
Because the mod grabs the digital signals directly and bypasses the chrominance/luminance signal generation, in theory it should produce a better signal than the VIC-II's S-Video output. Specifically, ...
As it turns out, it would require some kind of active converter/transcoder to do this since the RGB signal is not already separate.
As stated by snips-n-snails, one could mod the Commodore 64 to output component RGB, then convert that signal using the Retrotink Comp2RGB. This would give me the best possible picture/output available.
However, if one doesn't ...