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Assuming standard VGA with 256 KiB VRAM, 8bpp display modes resembling MCGA/VGA mode 13h, and an ISA bus in the 7 to 11 MHz range: For hardware-accelerated scrolling in eight directions, you need to make the virtual screen slightly larger in both dimensions than the actual screen. Let's say 336x224 ...

Gameboy seems to have this odd middle ground where it has a pile of good games, but also generally seen as simple enough that making a new C game doesn't seem "bad" but a lot of people have a deep love for it, possibly retrospectively thanks to the "music scene" around it. That and the most obvious...

pinobatch/snrom-template covers both SGROM/SNROM and UNROM/UOROM, at least for assembly language. To make it compatible with the compo's size limit, delete banks 3 through 14 from the linker script like so: # unrom512kbit.cfg by Damian Yerrick MEMORY { ZP: start = $10, size = $f0, type = rw; # use ...

That's mapper 28, not 29.

If you're interested in using MMC1, I'd consider UNROM instead. Setup is similar to MMC1. If you need the switchable nametable mirroring, you can make an A53 native ROM.

The point is that a properly calibrated TV won't show $0D as noticeably darker than $0F, despite that $0D's signal level is lower, because calibration would cause luma signal levels less than the 0 point to be clipped to 0.

Help text from 240p Test Suite, for comparison (with my emphasis): The PLUGE (picture line-up generation equipment) pattern is used to adjust the TV's "brightness" or black level. The inner bars are a signal level slightly lower than standard black, which causes some TVs to distort or even lose sync...

tl;dr Let me summarize pages 1-7. There was a noticeable gap in the pre-1997 NES library: original IP, safe for work, not unplayably rushed, featuring a solo, unmasked, humanoid-looking, post-puberty action girl player character. After asking around to see what if any homebrew games met those crite...

DMA and the increment register can be set to write to only low bytes or only high bytes of 16-bit VRAM words. However, if you want to add a drop shadow, that's on the CPU.

And congratulations on City Trouble . The game did what it set out to do and then some. I don't know how much this topic had to do with it, but Nebs 'n Debs , Wo xiang niao niao , Cheril the Goddess , and Lala the Magical all ended up as platformers with female leads. I'm not sure, however, quite wh...

Zapper in emulators is typically bound to the mouse. This means yes, I can test the emulated Zapper, as I did for Zap Ruder and for the Zapper test in 240p Test Suite. I also have a vintage TV and PowerPak against which to compare game behavior.

This post in November 2020 ten years later brought this old topic to mind, and I wanted to make readers who find this topic through search aware of subsequent developments as well as explore one (admittedly academic) option I had missed at the time. Nintendo were careful, and all these workarounds ...

I too am curious about the rationale behind the bumps. I'll hazard a guess though: What some deem superfluous others do not. On the other hand, if you're bumping something, I have found it helpful to "hang a lampshade" on it , that is, hide it by acknowledging it. Mention the time in months since th...

Kemco too? I thought it was just Koei.

See topic: Koei bytecode

Would it be helpful to define "ROM bank" for Super NES purposes as the portion of ROM occupying some fraction of a 65816 bank?

On S-Video you can see the vertical stripes, which are 60% finer than the vertical stripes you already see in half of the Genesis library.