Search found 1665 matches

by kyuusaku
Sat May 19, 2018 6:58 pm
Forum: NESemdev
Topic: Front Far East copier
Replies: 16
Views: 13814

Re: Front Far East copier

The FDS BIOS loads the contents of the config file as it's scanning disk (side) "A", in doing so it configures two of the copier's internal registers and boostraps it's own internal BIOS for control (to facilitate loading the subsequent disks). The file may or may not also hold the game's "catalog n...
by kyuusaku
Wed Jul 16, 2014 1:37 pm
Forum: NES Hardware and Flash Equipment
Topic: MMC3 on CPLD
Replies: 43
Views: 13707

Re: MMC3 on CPLD

HardWareMan wrote:the scheme is taken from someone's working draft of a project, maybe even PowerPack.
For posterity it's from artoh's FunkyFlashCart project:

viewtopic.php?f=9&t=463
by kyuusaku
Thu Feb 06, 2014 9:14 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

Feel free to get the last word in. This will be my final post in the thread because honestly I'm embarrassing myself by continuing. attempts to generalize me as impossibly arrogant to correct. Not impossibly, nor specifically arrogance. It's that you're unwilling to accept any information provided, ...
by kyuusaku
Thu Feb 06, 2014 10:28 am
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

I think, however, it would strike some, myself included, as a little, oh, I dunno, racist, RACIST, RACIST!!! ;) Personifying my sentiments through a popular figure who may or may not be of the same ethnicity as myself strikes you as racist? If I call you Honey Badger since Honey Badger just doesn't...
by kyuusaku
Tue Jan 14, 2014 4:28 am
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

Image
by kyuusaku
Sat Oct 12, 2013 8:16 am
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

You had none, and simply wanted to reiterate that nobody here has done a good enough job of producing a Red-Y/Blue-Y amplifier circuit to your satisfaction! Uh no? It's constructive criticism--something you don't appear to take too well. Funny thing, you could've actually been helpful here with thi...
by kyuusaku
Mon Apr 01, 2013 9:33 am
Forum: NES Hardware and Flash Equipment
Topic: Use of parallel ports in NES/PC interfaces
Replies: 66
Views: 7231

Re: Use of parallel ports in NES/PC interfaces

Interfacing with C64 peripherals etc is a completely different matter, FDSLoadr must somewhat accurately shift out/sample a ~100 kHz raw disk head signal whereas many other protocols are data layer, and handshaked such that jitter is irrelevant. Clearly one of the design principles of FDSLoadr was m...
by kyuusaku
Thu Mar 28, 2013 10:00 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

It's not so wrong to face the AC coupling cap towards the NJM, like basically every amplifier the input is biased so it's sort of standard practice when you're expecting an AC coupled signal, or low-offset DC coupled. Actually here it really doesn't even matter. Consider: -It takes over -1V across t...
by kyuusaku
Thu Mar 28, 2013 9:19 pm
Forum: NES Hardware and Flash Equipment
Topic: Use of parallel ports in NES/PC interfaces
Replies: 66
Views: 7231

Re: Use of parallel ports in NES/PC interfaces

FDSloadr needs a reliable timebase, which you can't get in a non-RTOS like Windows. If you rewrite it, you're better off targetting a FTDI chip in bit-bang mode (I'm saving this for a rainy week), or offloading the whole program to a microcontroller.
by kyuusaku
Thu Mar 28, 2013 8:32 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

The NJM is designed specifically for composite/luma, it doesn't seem to have a way to disable the clamp function so it can't be used as a general purpose 6 dB amp. Maybe this is a problem, maybe not.. Your 220 uF input capacitors are way too big. The bigger the capacitor the longer it takes to charg...
by kyuusaku
Thu Mar 28, 2013 5:38 pm
Forum: NES Hardware and Flash Equipment
Topic: Use of parallel ports in NES/PC interfaces
Replies: 66
Views: 7231

Re: Use of parallel ports in NES/PC interfaces

If it can forward port access, why doesn't it support parallel ports? By serial support it sounds like its just hooking the Windows API, not actually trapping the ports which apparently requires IOMMU--a recent hardware extension.
by kyuusaku
Thu Mar 28, 2013 4:24 pm
Forum: NES Hardware and Flash Equipment
Topic: Use of parallel ports in NES/PC interfaces
Replies: 66
Views: 7231

Re: Use of parallel ports in NES/PC interfaces

Will USB adapter drivers hook to port-writing DOS apps in NTVDM? Virtual machines? Which virtual machines are able to forward port access (today)? I know Dosbox can, but obviously there's timing jitter which still renders it unacceptable for many applications. My LPT solution has been to use a USB M...
by kyuusaku
Thu Mar 28, 2013 3:35 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

Post your exact circuit and maybe it can be explained.
by kyuusaku
Thu Mar 28, 2013 3:13 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

You're missing the point; of course the encoder's output is "compliant" with a DC offset. Luma is already prepped for series source termination so it's irrelevant. Wiring component's Y in parallel with S-video's Y does mean however that you can't leave S-video and component connected at the same tim...
by kyuusaku
Thu Mar 28, 2013 1:47 pm
Forum: SNESdev
Topic: YPbPr ouput mod for SNES consoles
Replies: 187
Views: 89606

Re: YPbPr ouput mod for SNES consoles

Pasky wrote:Hmmm maybe its possible the luma ouput is different per snes revision.
Or maybe people are creating broken "amps" due to minimal understanding of video signals, termination or transistor amplifier topologies.