Search found 461 matches

by Revenant
Tue Sep 11, 2018 8:31 am
Forum: SNESdev
Topic: SNES CD-ROM question
Replies: 25
Views: 16845

Re: SNES CD-ROM question

What if you used mode 7 to get packed pixels and then used the background scaling to handle the screen resolution / codebooks? You could, for example, scale the background down to use individual tiles as codebook entries, or something like that.
by Revenant
Tue Sep 11, 2018 8:14 am
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

Next, $0f5000.d7 is truly bizarre. If I write $0f5000.d7=1, then I can read any one $0x5000 status register. The second time I try and read one, the entire SNES deadlocks until I reset it. If I write $0f500.d7 before every read, then I read back the same exact values I normally get from $0x5000. Th...
by Revenant
Tue Sep 11, 2018 7:18 am
Forum: SNESdev
Topic: Who do you consider to be the snesdev/scene gurus?
Replies: 44
Views: 40776

Re: Who do you consider to be the snesdev/scene gurus?

On a related note, I just noticed this clip from the recent Datastorm 2018 demo party. At the embedded time stamp I'm discussing how SID Mania came to be with Alfatech (sitting to the right). I've been wanting to make a more official interview with him about the early SNES scene for some time. Mayb...
by Revenant
Sat Sep 08, 2018 3:59 pm
Forum: SNESdev
Topic: Who do you consider to be the snesdev/scene gurus?
Replies: 44
Views: 40776

Re: Who do you consider to be the snesdev/scene gurus?

4. Where there any interaction between the community and any official certified snes programmer(s)? Did any ever contribute to the documentation? On the other hand, did any member of the scene ever communicated his aspiration to use the documentation to somehow become an official Nintendo developer...
by Revenant
Wed Sep 05, 2018 8:18 am
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 9628

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

As for being able to make the SNES save the state of the Cx4, I suppose you could modify the $7fxx writes to also keep track of them somewhere else in RAM to be able to read/reapply them later, or possibly use the status flags to determine whether or not attempting to restore the entire Cx4 state is...
by Revenant
Wed Sep 05, 2018 8:05 am
Forum: SNESdev
Topic: Who do you consider to be the snesdev/scene gurus?
Replies: 44
Views: 40776

Re: Who do you consider to be the snesdev/scene gurus?

Antitrack -- for [...] SID-SPC.SRC (C64 SID emulator for SPC700) Wasn't that Alfatech? Or were they both involved with that in some way? Either way, thanks for writing up such a comprehensive post about some of the pioneers of the scene. I think I've mentioned this here before, but I'd totally love...
by Revenant
Sat Aug 25, 2018 11:32 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 9628

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

Myria wrote:How is it known that the Cx4 locks out SRAM, since X2 and X3 don't have SRAM?
RAM areas read back all zeroes whenever there's none available (or when the Cx4 is accessing the bus).
by Revenant
Sat Aug 25, 2018 4:09 pm
Forum: SNESdev
Topic: Cx4, ROM, SRAM, SD2SNES and saved states
Replies: 13
Views: 9628

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 addresses...
by Revenant
Thu Aug 23, 2018 8:55 am
Forum: NESdev
Topic: Aren't you afraid that NES Maker would just bring lazy noobs
Replies: 138
Views: 82686

Re: Aren't you afraid that NES Maker would just bring lazy n

I don't think NES Maker is any more liable to bring "lazy noobs" to the scene than, say, Game Maker, RPG Maker, nbasic (remember that?), etc. are. Nobody's first game is good. Lowering the barrier to entry only makes it easier to stop being a "lazy noob" by actually enabling peop...
by Revenant
Sat Aug 18, 2018 10:08 am
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

Cool, then pin31 is confirmed. For the corresponding bits: From what I know, access led is switched on via 2194h.bit2. But I don't know if it's 0=On or 1=On. And bios does set both 2194h.bit2 and 2194h.bit3 to the same value, don't know if bit3 is also having some effect on the LED state (or on the...
by Revenant
Fri Aug 17, 2018 10:56 pm
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

Okay, after another quick test, pin 31 is EXLED after all - grounding it turns the access LED off whenever it's enabled by $2194.
by Revenant
Wed Aug 15, 2018 10:28 am
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

The power LED is controlled directly by the power supply just like the one on the actual SFC (you can see as such in one of the other patent diagrams), and the access LED is powered by one of the outputs from DCD-BSA, but they're both basically regular single-color LEDs. Anyway, I did a quick test w...
by Revenant
Mon Aug 13, 2018 10:50 am
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

Cool, that's solving most of the remaining pins. Interesting that there are two 8-byte areas instead of only one 8-byte area. Yeah, that's strange. It seems like just including PA3 would have been easier for mapping the same 16-byte region. What do you mean by "high->low when accessing $xxA0 t...
by Revenant
Sat Aug 11, 2018 1:57 pm
Forum: SNESdev
Topic: BS-X Satellaview Datapak's
Replies: 112
Views: 135304

Re: BS-X Satellaview Datapak's

More register findings using my recently purchased Satellaview: CN2 pin 29 (U5 pin 75) goes low when accessing $xxA0 through $xxA7 CN2 pin 30 (U5 pin 74) goes low when accessing $xxA8 through $xxAF CN2 pins 33 and 34 (U5 pins 82 and 83) are respectively latched from writing bits 1 and 0 of $2197 (bo...
by Revenant
Fri Aug 10, 2018 9:07 am
Forum: SNESdev
Topic: bsnes-plus and xkas-plus (new debugger and assembler)
Replies: 210
Views: 206619

Re: bsnes-plus and xkas-plus (new debugger and assembler)

The current release does already have support for showing WRAM (as part of the entire CPU address space) in the graphics viewer, if that helps.