Search found 21992 matches

by tepples
Wed Nov 25, 2020 8:09 am
Forum: Other Retro Dev
Topic: DOS VGA Tricks
Replies: 25
Views: 492

Re: DOS VGA Tricks

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 ...
by tepples
Wed Nov 25, 2020 7:40 am
Forum: SNESdev
Topic: Are High SNES Homebrew Expectations Justified?
Replies: 97
Views: 9662

Re: Are High SNES Homebrew Expectations Justified?

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...
by tepples
Tue Nov 24, 2020 5:57 pm
Forum: 2020 NESdev Competition
Topic: Is MMC1 "Mapper 28 Compatible" - CC65 Setup
Replies: 3
Views: 70

Re: Is MMC1 "Mapper 28 Compatible" - CC65 Setup

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 ...
by tepples
Tue Nov 24, 2020 5:49 pm
Forum: 2020 NESdev Competition
Topic: Is MMC1 "Mapper 28 Compatible" - CC65 Setup
Replies: 3
Views: 70

Re: Is MMC1 "Mapper 29 Compatible" - CC65 Setup

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.
by tepples
Mon Nov 23, 2020 9:20 pm
Forum: NESdev
Topic: Broken Palette Links / and another Palette Choice
Replies: 15
Views: 5207

Re: Broken Palette Links / and another Palette Choice

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.
by tepples
Mon Nov 23, 2020 8:06 pm
Forum: NESdev
Topic: Broken Palette Links / and another Palette Choice
Replies: 15
Views: 5207

Re: Broken Palette Links / and another Palette Choice

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...
by tepples
Sun Nov 22, 2020 4:58 pm
Forum: General Stuff
Topic: Homebrews with female characters
Replies: 122
Views: 30749

Re: Homebrews with female characters

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...
by tepples
Sun Nov 22, 2020 2:50 pm
Forum: SNESdev
Topic: Can the SNES use 1bpp tiles?
Replies: 15
Views: 634

Re: Can the SNES use 1bpp tiles?

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.
by tepples
Fri Nov 20, 2020 8:09 am
Forum: General Stuff
Topic: Homebrews with female characters
Replies: 122
Views: 30749

Re: Homebrews with female characters

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...
by tepples
Thu Nov 19, 2020 8:49 pm
Forum: NESdev
Topic: Fceux Qt/SDL Port Testing
Replies: 30
Views: 4154

Re: Fceux Qt/SDL Port Testing

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.
by tepples
Thu Nov 19, 2020 7:58 pm
Forum: NESdev
Topic: FDS homebrew ?
Replies: 39
Views: 13448

KYODAKU (256 bytes)

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 ...
by tepples
Thu Nov 19, 2020 2:56 pm
Forum: General Stuff
Topic: Homebrews with female characters
Replies: 122
Views: 30749

Re: Homebrews with female characters

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...
by tepples
Wed Nov 18, 2020 8:54 pm
Forum: NESdev
Topic: Programming the NES with a high level programming language
Replies: 10
Views: 447

Re: Programming the NES with a high level programming language

Kemco too? I thought it was just Koei.

See topic: Koei bytecode
by tepples
Wed Nov 18, 2020 7:05 pm
Forum: SNESdev
Topic: SNES Development and 64tass
Replies: 12
Views: 862

Re: SNES Development and 64tass

Would it be helpful to define "ROM bank" for Super NES purposes as the portion of ROM occupying some fraction of a 65816 bank?
by tepples
Wed Nov 18, 2020 6:52 pm
Forum: SNESdev
Topic: What is the point of the pseudo hi-res mode?
Replies: 6
Views: 1567

Re: What is the point of the pseudo hi-res mode?

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.