Commander X16

Could the issue be simply that on VGA, you will get 480 visible lines (525 total lines) in 1 frame, and on NTSC and RGB, you get 525 total lines (or 526 in 240p) in two frames. Therefore, each scanline scans out at (approximately) half the speed? Therefore 63 NOPs would only consume half a line, as ...

The way FX works takes advantage of the hardware design, particularly the way the SRAM can be accessed by the FPGA. It can write to a nibble at a time without affecting the adjacent memory, which is why 4bpp mode can work so well with it. If you were to introduce a trick to *modify* data by writing ...

As part of Team FX along with @Jeffrey, I'm proud to announce the release of the Commander X16 port/remake of Second Reality. After hundreds upon hundreds of hours of development, and almost exactly one year from inception, it premiered at VCF Midwest on Sunday, the 8th of September, 2024 at David M...

The r42 changes, particularly the need to prepend @: to filenames when overwriting, broke all of my software. This particular change brought the emulator (HostFS) into alignment with the behavior of real hardware (or SD card image on emulator). CMDR-DOS on SD card has always required `@:` for overw...

The ZSMKIT Binary doesn't work on R43, Only R44+ :). (and yes I know it is your code.) :) This thread is about forward compatibility (things written for R43 that work properly on R43 continuing to work on later releases), not for things that require new features or fixed bugs to work. ZSMKit requir...

I think I understand now. So as long as I stay within $0022-$007F, $0400-$9EFF, and RAM banks other than bank 0, I should be safe from having anything clobbered if I use a kernel procedure. I hope I've got that right. And that is final and can be depended upon? Yup, that memory should be untouched ...

Memory map in terms of documented APIs, yes, that should be finalized. Undocumented KERNAL memory has no such guarantees. I cannot recommend having cartridge software depend on the specific layout of the internals of the kernal that is not exposed via an API.

The arrangement of RAM (ZP $80-$FF, system RAM $200-$3FF, and RAM Bank 0) is not "locked in" and are not guaranteed to be static. New features will probably continue to be added from time to time and bug fixes applied. We do have some ideas for mitigating the missing access to certain kern...

There was a recent change in the ROM joystick scanning code (just prior to R45's release) which caused bad behavior in the emulator, and we merged a fix moments ago. Please try this ROM.

https://nightly.link/x16community/x16-r ... 6622152310

Updated 2023-10-22, lots of little bugfixes and some quality of life improvements. Space bar pauses and unpauses. Tab advances to the next song (random song if Shuffle mode) The right arrow key will warp the file browser cursor to the currently playing song, if applicable. The VIA1 timer option make...