Search found 328 matches

by semicolo
Mon Sep 03, 2012 1:01 pm
Forum: Hardware Modification and Repair
Topic: VGA Mod for DC
Replies: 4
Views: 2221

Re: VGA Mod for DC

Are you using a tv or a vga monitor?
I did this circuit once and it worked as it should on a pc monitor. If I remember well, in vga mode the signal is progressive.
I think the only time I had black and white was when I connected ntsc composite video on a pal tv (it's been almost 10 years)
by semicolo
Sun Oct 21, 2007 11:22 am
Forum: Hardware Modification and Repair
Topic: Very odd PC problem...
Replies: 5
Views: 1033

Re: Very odd PC problem...

Look for leaked capacitors on the motherboard
see there for informations :
http://en.wikipedia.org/wiki/Capacitor_plague

If you've got some bad capacitors, you'll need to have them replaced or to change the motherboard.
by semicolo
Mon Sep 24, 2007 6:55 am
Forum: Programming Discussion
Topic: [FIXED:HELP] I'm unable to compile KOS
Replies: 5
Views: 804

Re: [HELP] I'm unable to compile KOS

2 months ago I had no problem compiling the toolchain with ubuntu, are you using the svn version of KOS ?
by semicolo
Fri Aug 31, 2007 9:17 pm
Forum: Off-Topic Forum
Topic: Bad Firmware Flash Woes on External HDD
Replies: 3
Views: 218

Re: Bad Firmware Flash Woes on External HDD

you probably can't do anything more, you'd need to reprogram the flash using a flash programmer since the self programming part must be damaged now. Maybe there's some jtag workaround but only the manufacturer must know of it and you'd need specific hardware to do this. And I assume you can't open t...
by semicolo
Wed Aug 29, 2007 2:21 pm
Forum: Hardware Modification and Repair
Topic: Battery Replacement
Replies: 3
Views: 945

Re: Battery Replacement

It's soldered on the board and it's a 3,6V rechargeable battery. Ask a technician to do it for you.
by semicolo
Thu Aug 02, 2007 9:59 pm
Forum: Hardware Modification and Repair
Topic: Did the modem LED mod again, issue though..
Replies: 2
Views: 758

Re: Did the modem LED mod again, issue though..

double check if you didn't short two pins together when you soldered your wires, your modem may be dead now.
by semicolo
Wed Jul 25, 2007 9:13 am
Forum: Hardware Modification and Repair
Topic: Please help! Dream Cast controller port!
Replies: 3
Views: 788

Re: Please help! Dream Cast controller port!

do you mean : if you use only one controller it works ok, but if you plug too many it doesn't work and if you keep only one plugged it works again ?
If so, you must have a 10 ohms resistor on the controller board, which is wrong.
by semicolo
Thu Jul 19, 2007 10:39 am
Forum: Programming Discussion
Topic: Simplygon
Replies: 9
Views: 862

Re: Simplygon

well of course it can be useful if your game engine lags because the models you use have too much polygons.
by semicolo
Mon Jul 16, 2007 5:04 pm
Forum: Hardware Modification and Repair
Topic: Verifying Power Board Replacement/Rumble pack feel decreaser
Replies: 3
Views: 1262

Re: Verifying Power Board Replacement/Rumble pack feel decreaser

if you don't find a near zero fusing resistor, but use a 10 ohms one like lot of tutorials say to do, you'll probably don't feel any rumble anymore. I'll repeat one more time : the original resistor is a fusing resistor. It's value is about 0,4 ohms. I you use a 10 ohms resistor, it should work for ...
by semicolo
Fri May 04, 2007 12:05 pm
Forum: Hardware Modification and Repair
Topic: PIC Microcontrollers
Replies: 5
Views: 659

there should me emulators you can use to simulate what's happening.
Maybe you've got a watchdog trouble, or the port is configured as input.
by semicolo
Wed Apr 18, 2007 5:37 pm
Forum: Hardware Modification and Repair
Topic: Portable Dreamcast need a little help
Replies: 18
Views: 1038

don't know if it would work, you'd really better use a regulator from a single battery than what you suggest (a pack will likely drain out before the others and it'll be difficult to keep each battery to it's nominal charge, and it's not garanteed to work well).
But you can try it.
by semicolo
Tue Apr 17, 2007 11:26 am
Forum: Hardware Modification and Repair
Topic: Portable Dreamcast need a little help
Replies: 18
Views: 1038

no you can't without a dc-dc converter, the dreamcast will work at 4,8V because it's close enough of 5V but it won't work for 3,7V. And you better use a single battery and a converter that gives you the 3 needed voltages. it seems they feed 5V where 3,3V is needed, whil this may work, it's prone to ...
by semicolo
Mon Apr 16, 2007 11:29 am
Forum: Hardware Modification and Repair
Topic: Portable Dreamcast need a little help
Replies: 18
Views: 1038

quite simple, the mini itx board converts a battery voltage to +12 +5 -5 -12 and 3,3V, just ignore the 5V stb and -12V -5V and wire 12 5 and 3,3V to the dreamcast.

What 4,8V cell battery ?
by semicolo
Mon Apr 16, 2007 11:20 am
Forum: Hardware Modification and Repair
Topic: PIC Microcontrollers
Replies: 5
Views: 659

nope, used 16f84 or 12cxx series, is it a new device ? what clock are you using ?
by semicolo
Fri Feb 16, 2007 6:14 am
Forum: Hardware Modification and Repair
Topic: Dreamcast Keyboard to PC?
Replies: 7
Views: 1689

no, adapters quite NEVER work in reverse, because they'd be much more trouble to build (and humans are lazy). Just think for example of a power supply unit, it won't give you 110VAC if you powers the dc part. Same thing for a vga box, it's one way only it converts the dreamcast output to vga, but ca...
by semicolo
Fri Feb 16, 2007 6:08 am
Forum: Hardware Modification and Repair
Topic: Is there a way to remove the vmu ports on the DC controller?
Replies: 4
Views: 839

well I don't see why you couldn't remove it, desolder it and try it out. If it doesn't work there must be some resistor terminators or jumpers, but you'll be able to fix it.
by semicolo
Fri Feb 09, 2007 11:28 am
Forum: Hardware Modification and Repair
Topic: lcd replacement
Replies: 2
Views: 424

I think the nomad screen's input is composite video, you should first diagnose exacly what's wrong. First testing the screen with an external video source. and second outputting the console video to a tv set.
I agree with Xylene, the gp32 lcd is probably digitally driven and wouldn't work.
by semicolo
Mon Feb 05, 2007 12:27 pm
Forum: Hardware Modification and Repair
Topic: Dead DC Controler (Stub Short-out?)
Replies: 3
Views: 497

an ohmmeter is used to measure resistance, you find it at radioshack or any electronic shop. (it usually includes a voltmeter and an ampmeter in the same tool). The cheapest are probably worth 15 to 20 usd buy a new controller, if it doesn't work either, it's probably f1 that's burned (it's on the c...
by semicolo
Sat Feb 03, 2007 7:42 am
Forum: Hardware Modification and Repair
Topic: Dead DC Controler (Stub Short-out?)
Replies: 3
Views: 497

Well if you plug/unplug controllers while the dreamcast is on, it theorically creates an infinite current spike, in the real world the current spike is finite. I think that everybody already unplugged/plugged back some controllers some day without busting anything, but it COULD damage something. If ...
by semicolo
Thu Feb 01, 2007 11:50 am
Forum: Hardware Modification and Repair
Topic: Sega Dreamcast MARK I
Replies: 17
Views: 2389

I'm not enough of an artist to find this beautiful. I may be wrong (and don't want to say it didn't took you time nor efforts), but I've got the feeling that opening the dreamcast and giving it's shell and a pen to a kid would produce the same result.