Search found 6 matches

by Myria
Sun Sep 02, 2018 10:03 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 7528

Re: Cx4, ROM, SRAM, SD2SNES and saved states

Is there a way to know whether the Cx4 is currently locking out ROM and SRAM? Also, will the Cx4 take control of ROM/SRAM suddenly, or does it have to be triggered by something on the 65816?
by Myria
Sun Aug 26, 2018 11:50 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 7528

Re: Cx4, ROM, SRAM, SD2SNES and saved states

The CX4 has a 32 bytes of RAM that replace all of the SNES's vectors while the CX4 is hogging the ROM. The game has to use this to point to an alternative vector in the SNES's own WRAM. Looking at X2, I don't see anything on the 65816 side writing to 7F60. The NMI and IRQ handler addresses in the R...
by Myria
Sat Aug 25, 2018 8:10 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 7528

Re: Cx4, ROM, SRAM, SD2SNES and saved states

The Cx4 locks out both ROM and SRAM whenever it's accessing either of them. Most of the time it's either running code from its internal cache or not running at all, but otherwise it claims the cartridge bus when caching a new code page, performing DMA, or reading/writing individual ROM/RAM addresse...
by Myria
Sat Aug 25, 2018 3:14 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 7528

Cx4, ROM, SRAM, SD2SNES and saved states

Hi =^-^= I make the practice ROMs for the SNES Rockman X games. They add features like giving you the appropriate items for the route when selecting stages, and importantly, adding saved states. With X2 and X3, the practice ROM can of course only run flash carts that have a way to support Cx4 games....
by Myria
Thu Jun 30, 2016 7:57 pm
Forum: NES Hardware and Flash Equipment
Topic: Getting S-Video from a NESRGB-modded Famicom2
Replies: 3
Views: 1533

Getting S-Video from a NESRGB-modded Famicom2

I have a NESRGB-modded A/V Famicom. I use it with a GameCube SCART cable, and I get SCART RGB output just fine. However, sometimes I take my Famicom2 on the road with me (particularly, to *GDQ). I don't want to bring my full setup--my XRGB-3, DVI+audio-to-HDMI converter box, etc.--with me. When I tr...
by Myria
Thu Jun 30, 2016 7:49 pm
Forum: phpBB Issues
Topic: Anti-spam legitimate answer wasn't accepted
Replies: 31
Views: 25309

Anti-spam legitimate answer wasn't accepted

The anti-spam question I first got when registering was "what feature of the 6502 did Ricoh not implement on the NES?". The answer I gave, "_____ flag", wasn't accepted.

Melissa

[note: post modified by admin for security/obscurity]