Search found 1314 matches

by nocash
Sun Feb 21, 2021 2:17 pm
Forum: SNESdev
Topic: How to generate a solar-storm waveform with SPC700?
Replies: 5
Views: 1047

Re: How to generate a solar-storm waveform with SPC700?

Next cooler thing: Jasmine Harrison has just become the first person ever to cross the Atlantic in a rowing boat with chocolate as main food source.
Edit: Or not the very first person, Katie Spotz seems to have done it earlier, but it's cool anywas.
by nocash
Sun Feb 21, 2021 11:16 am
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 26
Views: 28376

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

Yes, the note under the table on http://problemkaputt.de/fullsnes.htm#sn ... tsmadchips does say just that:
"when using two ROMs, Addr2 is used as upper ROM address line (eg. Addr2=A20 for a cart with two 1Mbyte ROM chips)"
by nocash
Sat Feb 20, 2021 10:27 pm
Forum: Other Retro Dev
Topic: NDS Cartridge ROM specs
Replies: 8
Views: 5971

Re: NDS Cartridge ROM specs

I've dumped the SanDisk ROM in Walk with Me. It's doing some uncommon things: reads are forcefully 200h-byte aligned attempts to read more than 200h bytes is padded with unencrypted FFh bytes And, it's one of those super-slow cheap new ROMs. That chips could be more or less reasonably fast when read...
by nocash
Fri Feb 19, 2021 9:12 pm
Forum: Other Retro Dev
Topic: NDS Cartridge ROM specs
Replies: 8
Views: 5971

Re: NDS Cartridge ROM specs

I've got a "Walk with Me" cartridge - mostly because I was interested in the built-in infrared port & external pedometer - however, the SanDisk ROM chip is also pretty weird: The 4th byte of the ROM's chip_id has bit6 set. That was believed to indicate a DSi cartridge. But, this is a NDS game (with ...
by nocash
Sun Feb 07, 2021 10:28 am
Forum: SNESdev
Topic: SNES Parallel port RAM cart
Replies: 7
Views: 1190

Re: SNES Parallel port RAM cart

It's an internal mod for the console, it can disable /RD and /ROMSEL so there will be no conflict with the cart databus even when having a cartridge inserted (but the circuit can activate the cart memory after upload). The other issue are address/data signals from CPU during upload, that's solved by...
by nocash
Sun Feb 07, 2021 8:21 am
Forum: SNESdev
Topic: SNES Parallel port RAM cart
Replies: 7
Views: 1190

Re: SNES Parallel port RAM cart

Console mod to upload and execute code in internal WRAM: http://problemkaputt.de/fullsnes.htm#snesxboouploadwramboot Wiring parallel data lines to WRAM with auto-increasing addresses is ways faster and much cheaper than anything else. I guess the reception does range from "Why didn't we do that in 1...
by nocash
Sat Feb 06, 2021 5:33 pm
Forum: GBDev
Topic: Replacing a GBA SP link port with a DMG link port
Replies: 6
Views: 562

Re: Replacing a GBA SP link port with a DMG link port

Until a few minutes ago, I've had never seen an official service manual or schematic for any nintendo handhelds. Are there more such documents around? Specs for the BGA chips in NDS and newer consoles would be especially interesting. Pinouts for GBA and GBA SP are in https://problemkaputt.de/gbatek....
by nocash
Sat Feb 06, 2021 11:01 am
Forum: GBDev
Topic: Replacing a GBA SP link port with a DMG link port
Replies: 6
Views: 562

Re: Replacing a GBA SP link port with a DMG link port

There is a voltage switch in the cartridge slot. That's all, the voltage just depends on the cartridge. GBA and GBA SP still use 5V in 8bit mode.
by nocash
Fri Feb 05, 2021 1:11 pm
Forum: Homebrew Projects
Topic: Saru Kani Panic - An action puzzle game for NES and FC
Replies: 27
Views: 17108

Re: Saru Kani Panic - An action puzzle game for NES and FC

The first image is really colorful, it could perhaps have more contrast between background and foreground (unless that ends up with the overall appearance to get worse). The contrast in third image with the beach looks better. The forest image, it might help to increase or decrease the width of the ...
by nocash
Thu Feb 04, 2021 6:43 am
Forum: SNESdev
Topic: Super Famicom Box (Hotel Box)
Replies: 11
Views: 19345

Re: Super Famicom Box (Hotel Box)

About the PM'ed schematics (which I hope you'll publish them here): GROM_ and KROM_D0..D7 and _A0..Axx are almost certainly the Z80 data and address bus, so Z80_D0 would be a better name (except for some of the chip selects and some of bank-switched higher address lines). A19_HIROM and up are SNES_A...
by nocash
Wed Feb 03, 2021 4:11 pm
Forum: SNESdev
Topic: How to generate a solar-storm waveform with SPC700?
Replies: 5
Views: 1047

Re: How to generate a solar-storm waveform with SPC700?

There is also a tech paper from M. China and L. Bennett first published 1993 as a supplement in some copies of Ablaze! fanzine issue 10: Abstract: Check astrophobolical w h e a ther forecast horoscope in magazine , then bring APU into low orbit less than 1 light second? ☆ Large heat shield required ...
by nocash
Wed Feb 03, 2021 1:06 pm
Forum: SNESdev
Topic: How to generate a solar-storm waveform with SPC700?
Replies: 5
Views: 1047

Re: How to generate a solar-storm waveform with SPC700?

As far as I remember, it was mentioned in the japanese programming reference, or in one of the SFC patents.
I am fairly sure that all nibbles are hexadecimal (albeit exceeding the currently known range).
by nocash
Wed Feb 03, 2021 5:18 am
Forum: SNESdev
Topic: Super Famicom Box (Hotel Box)
Replies: 11
Views: 19345

Re: Super Famicom Box (Hotel Box)

Some of the payment options cannot be enabled unless when tweaking the KROM to do so... In krom 2, replace at offset d508 with 07 and now you can activate option 3 in payment. Now there are some more menus. Go back to attract mode and start the game. the atrom will display a new menu with 2 more opt...
by nocash
Wed Feb 03, 2021 4:42 am
Forum: SNESdev
Topic: Super Famicom Box (Hotel Box)
Replies: 11
Views: 19345

Re: Super Famicom Box (Hotel Box)

Some stuff from the PMs (about the old KROM1 version and mainboard pinouts)... You can find the translation for the menu here (krom1): http://www.famicom.ch/home/super-famicom-box Okay, that makes the options screens a bit less bewildering. I'm sure you've noticed that the krom pcb has some missing ...
by nocash
Wed Feb 03, 2021 4:37 am
Forum: SNESdev
Topic: Super Famicom Box (Hotel Box)
Replies: 11
Views: 19345

Re: Super Famicom Box (Hotel Box)

Also SFC-Box related, there has been this thread a while ago: http://forums.nesdev.com/viewtopic.php?f=12&t=21511 (originally with GUI questions, and ending up with GAL dumps for SFC-Box game cartridges, that GAL dumps aren't disassembled yet though, and the GAL pinout/wiring is still unknown).