SpritesMind.Net

You may have to wait for the next hblank in your code. ------------- *>>> >>>>>>>>===== ------------- Pretty ascii art. Say the h irq fires at *, which is too late for your code to hit hblank. Insert nops or other constant-time waiting, >, the right amount so that your code, =, hits exactly the righ...

I suppose you could interleave video and lower quality audio in the normal 1x (150kb/s) read rate, though with the finicky system each cd hickup will mean a small freeze then.

Beyond the cd issue, I don't think usb gives enough power? The original PSU was something like 10V 1.2A = 12W, while usb only gives 5V 0.5A = 2.5W. Maybe you're connecting to a standalone usb charger rated for 2.5A, using usb charging cables (not regular data cables!), but that's a slightly rare set...

I suppose he wants to emulate a WAV using either synth or PSG, like those ancient speech synthesizers did. It'd sound bad/metallic/robotic/etc, and I don't think any such kit exists for Genesis.

m68k has been saved.

Software solution to a hardware problem The quick solution would have been a composite out for your computer.

This is still cool, and one more use of the usb connection is good.

Posted.

The m68k backend is at risk of being dropped from gcc release 11. It uses some old conventions, and needs to be updated. There's a bounty open, currently 5,3k $: https://www.bountysource.com/issues/80706251-m68k-convert-the-backend-to-mode_cc-so-it-can-be-kept-in-future-releases Having a modern gcc ...

You have another sprite covering your high-prio-bit sprite. That low-prio-bit sprite is higher in sprite priority, which means it covers your high-prio-bit sprite, but lower in the plane bit priority, which means it's below the high-prio plane. Tricks like this are commonly used back to the NES era ...

You can try addr2line with the generated .elf file and that PC address. Verify with a debugging emulator, use the memory view and see what asm is at the pc address.

The linker script puts code first, then rodata. It's very unlikely for you to ever have 2mb of code.

"load ROMs quickly for development and debugging" -> both have an usb connection for that. ARM is just a detail.

And the second UMDK and Mega Everdrive x7.

Well yes, GOAC + output mixer + glue would be cheap to make, however the total market for any expansion is low. Even for official Sega ones.

Are the japanese disc docs in japanese?