Denial

Ingo's dedicated opinion is not a good basis to get things done, Well, given that these things are passion projects, not financial items, I think it's as good a basis as any if one expects Ingo to do the work. The promise of open source was that lots of people would contribute to source code, but t...

Jim, I think it would be best to modify the implementation to not use 1581 sub-partitions, quite honestly. sub partition support in sd2iec requires a ton of code to make it work (one has to implement formatting inside an image, and the code for sub-partitions cannot be shared with any other drive t...

I think it would be best to modify the implementation to not use 1581 sub-partitions, quite honestly. sub partition support in sd2iec requires a ton of code to make it work (one has to implement formatting inside an image, and the code for sub-partitions cannot be shared with any other drive type), ...

With apologies to those who think $ffff should be at the bottom, it is more common for 0 to be at the bottom and $MAX to be at the top: https://www.google.com/search?q=memory+map&client=firefox-b-1-d&tbm=isch&source=iu&ictx=1&fir=KdgyaK_ZB_qykM%252C-IK5sMTdXGbYiM%252C%252Fm%252F0...

For the brave, the adventurous, the ones willing to try new things, after an incredibly long wait, I present the MasC=uerade. This unit remaps control lines from the VIC-20 onto a pseudo C64 cartridge socket, potentially allowing C64 I/O cartridges to operate in the VIC-20. At $11.00, it's almost to...

Ah, I missed that those are JOYPORT 1 pins. Duly noted.

Back in the day, there were second joyport adapters for the VIC. That's what I thought those were. IN any case, I wonder what pinout they used. (Can't check right now, but I know it was a thing).

Jim

PA2 on the 64 (M) is VIC CB2 SP2 on the 64 (7) is LIGHTPEN (PA5) on the VIC. So, SP2 is easy to grab, and it looks like you can coax CB2 into providing the needed result. Interestingly, though, VIC already plans PA2,3,4,5 as joystick #2 direction pins, so If you're already using the VIC second joypo...

That was the only reason I could see for such variety.

With the differences between the CIA and VIA, can the same process the code uses to read SP2 and CA2 in the 64 be used to read the respective lines in the VIA?

Jim

Mike, with all due respect, you're missing my point. I am wondering why the HW designers felt the need to rearrange the mappings in such a haphazard way. Yes, I understand that it's 10 binary values, and no matter how messed up they are, at most it takes 10 reads and 10 writes to correctly assemble ...

No idea why the others put the directions on placesmother than 0-3/4-7, as that makes the most sense and take the least code. The designers of the Protovision adapter likely wanted to map the register bits the same way as with the C64 standard joysticks, the sole exception being fire of the second ...

As do I, and especially the Hitmen one:
http://hitmen.c02.at/files/hardware/4player/4player.txt

No idea why the others put the directions on placesmother than 0-3/4-7, as that makes the most sense and take the least code. You can't tell me routing 8 IO lines forced their hand.

Jim

Wonder why they put the two different fire buttons on separate data pins? The sample code doesn't take advantage of that at all. Is there a use case where knowing the state of both fire buttons at the same time is important but the direction of the joyport is not?

Jim

True, but VIC-MIDI with the CPLD and the 512kB FLASH is equally cheap. Sure, the PCB has a ton of unused footprints, but it's done and working. Or, of course, just fire up the CAD and delete all the unused stuff.

Jim

Well, UltiMEM fits in a standard CBM case, so that's not a huge issue. Box and artwork would be a different story.

JIm

Your common 40/80 column card will very likely occupy the vectors of CHRIN and CHROUT to make the screen editor work. There's the resource clash, as the SD card drive will also need these two vectors for file I/O with PRINT#/INPUT# (respectively, their KERNAL call equivalents). I'm assuming the car...