Search found 1293 matches

by nocash
Mon Jan 18, 2021 4:15 pm
Forum: Other Retro Dev
Topic: Video Game Consoles with games stored in single-sided cards
Replies: 10
Views: 319

Re: Video Game Consoles with games stored in single-sided cards

Like double-ended Atari 2600 cartridges by Xonox ? I didn't knew those. Looking at a picture of the interiors... they contain two PCBs with separate ROMs... A single PCB with single ROM might have been more elegant. Four-enders should also work, perhaps with a dial to rotate a square PCB inside of ...
by nocash
Sun Jan 17, 2021 4:56 pm
Forum: Other Retro Dev
Topic: Video Game Consoles with games stored in single-sided cards
Replies: 10
Views: 319

Re: Video Game Consoles with games stored in single-sided cards

Makes me wonder if there are double sided 2-in-1 multicarts, or games with extra levels on side B : )
by nocash
Sun Jan 17, 2021 1:16 am
Forum: Homebrew Projects
Topic: Animated Optical Illusions
Replies: 4
Views: 235

Re: Animated Optical Illusions

Here is a spinning cube running on the SNES. That is pretty cool. There should be better ways to get better animations even on the oldest consoles... but it's really cool as a hidden joke aimed at people whom happen to have a closer look at the program-code, or at the laundry drum shaped BG-layer. ...
by nocash
Sun Jan 17, 2021 12:41 am
Forum: General Stuff
Topic: problemkaputt.de is gone
Replies: 15
Views: 2724

Re: problemkaputt.de is gone

50cent/mo for both hosting and domain is dreaming, when just a domain goes for ~10/year. No, that's real. The domain is included, my old hoster did have that, too, 0.49 eur/month. I don't know how they handle support and logistics for that price. I needed to contact support only once in 5 years, wh...
by nocash
Thu Jan 14, 2021 11:52 pm
Forum: Other Retro Dev
Topic: NDS Wifi specs
Replies: 22
Views: 10639

Re: NDS Wifi specs

I don't really know the IEEE specs for the Duration values. I guess they are reserving extra time for responses? And also don't know if the NDS durations are used or adjusted by hardware or software (or if that differs per packet type). What I have observed when logging incoming multiplyer REPLY's i...
by nocash
Thu Jan 14, 2021 11:02 pm
Forum: SNESdev
Topic: Using high bank lines as address decoder?
Replies: 6
Views: 664

Re: Using high bank lines as address decoder?

That was referring to your example. You were using A22=1 (BA6) to enable SRAM, which does confilct with WRAM in bank 7Eh-7Fh. The SRAM mapping may work in other banks, but the WRAM stops working with that example. Oh, and latching: The whole address bus is supposed to stay constant throughout the wh...
by nocash
Wed Jan 13, 2021 2:28 pm
Forum: Other Retro Dev
Topic: NDS Wifi specs
Replies: 22
Views: 10639

Re: NDS Wifi specs

Now I have managed to receive Empty Replies, too. Receiving those is enabled by setting RXFILTER.bit8. What is weird is that I've received different types of empty packets (both with HWHDR[0]=801Fh, Rate=2Mbit/s, 18h-byte IEEE header, and 0-byte frame body): FC=0000, Duration=00A2, Addr1=Own, Addr2=...
by nocash
Tue Jan 12, 2021 5:56 pm
Forum: General Stuff
Topic: problemkaputt.de is gone
Replies: 15
Views: 2724

Re: problemkaputt.de is gone

Didn't know that. Sounds interesting... except github is always spear-heading not to support older computers (I wouldn't feel comfortable with having a webpage if I couldn't access it myself).
by nocash
Tue Jan 12, 2021 4:45 pm
Forum: General Stuff
Topic: problemkaputt.de is gone
Replies: 15
Views: 2724

problemkaputt.de is gone

Hmm, I was just browsing through some folders via Core FTP LE, and after returning to the top level folder of my webpage... most folders and files seem to have disappeared... I do have a backup of the webpage on my harddisk, but the public webpage is gone for now, whoops. Well, that's making things ...
by nocash
Tue Jan 12, 2021 3:29 pm
Forum: SNESdev
Topic: Using high bank lines as address decoder?
Replies: 6
Views: 664

Re: Using high bank lines as address decoder?

Really not recommended, but I think this should work... ROM./CS=/ROMSEL SRAM./CS=A15 and SRAM.CS2=A23 The SRAM would be accessible at 80h-BFh:6000h-7FFFh, but that location isn't compatible with SRAM mapping in standard LoROM carts & standard LoROM emulation. And it would cause bus conflicts when ac...
by nocash
Tue Jan 12, 2021 2:58 pm
Forum: Other Retro Dev
Topic: NDS Wifi specs
Replies: 22
Views: 10639

Re: NDS Wifi specs

Now I've logged the Multiplay Master side, too. Here's a summary of the log... Flowchart (at Master side) After starting transfer via TXREQ and TXBUF_CMD write: TXBUSY=2 (formerly 0) (after TXBUF_CMD write, or sometimes a bit later) After about 50-500 microseconds: ;\ RF_STAT=3 (TXing) (formerly 2) ...
by nocash
Sun Jan 10, 2021 5:29 pm
Forum: Other Retro Dev
Topic: NDS Wifi specs
Replies: 22
Views: 10639

Re: NDS Wifi specs

I've logged the register changes that are happening on slave side on real hardware. Here's a summary: Flowchart (at Slave side) At incoming CMD DATA packet: ;\ RF_STATUS=6 ;RX processing incoming stuff ; After RX preamble: ; CMD IRQ6 (RX Start, for CMD DATA) ; DATA After RX data: ; IRQ0 (RX Done, fo...
by nocash
Fri Jan 08, 2021 9:25 pm
Forum: Newbie Help Center
Topic: Getting started (in 2021)
Replies: 10
Views: 1479

Re: Getting started (in 2021)

Also have a look at a NES hardware reference (spam warning: try my own everynes.htm document, for example). Ie. something that gives an overview about which registers are there, and what are they doing. Without other docs, tutorials can sound like black magic... why do they want me write that value ...
by nocash
Mon Jan 04, 2021 2:14 pm
Forum: Other Retro Dev
Topic: NDS Wifi specs
Replies: 22
Views: 10639

Re: NDS Wifi specs

Two months later - new year, new try. I've given up on disassembling the DSi's DS Download Play tool, and instead switched to disassembling the much older Metroid First Hunt cartridge (which looks only half as complicated: less special-case-do-this-if-that stuff, and also I/O port access less obscur...
by nocash
Tue Dec 29, 2020 12:47 pm
Forum: SNESdev
Topic: Generate a read signal when accessing 0x8000
Replies: 3
Views: 515

Re: Generate a read signal when accessing 0x8000

Yeah, sounds timing related. The /CART signal is derived from some address logic for selecting LoROM and HiROM areas, excluding the WRAM area. That might make /CART a bit slower as when using the raw address bus signals. For the standard LoROM addresses, you could try using /RD=0, A15=1, A22=0 with ...