Search found 12 matches

by xiaolong
Sun Nov 05, 2017 11:09 pm
Forum: Games & Demos
Topic: New Game: Bugz
Replies: 41
Views: 14150

Re: New Game: Bugz

But since the wasp doesn't reappear, it has to be done right or the level is lost. There is actually way out of this: "In either of the two player modes, both players must agree to restart the current level by pressing and holding START at the same time" BTW, what a great game! My son has wanted to...
by xiaolong
Tue Jun 20, 2017 10:58 pm
Forum: Hardware
Topic: gamepad pins does not wiork
Replies: 20
Views: 7354

Re: gamepad pins does not wiork

Have you connected pin 30, AVCC? From datasheet:"AVCC is the supply voltage pin for Port A and the Analog-to-digital Converter. It should be externally connected to VCC, even if the ADC is not used."
by xiaolong
Thu Mar 02, 2017 10:43 pm
Forum: Programming & Software
Topic: Uzebox SD Gameloader V0.4.5
Replies: 179
Views: 101127

Re: Uzebox SD Gameloader V0.4.5

Hi Vikt0r!
There were some problems with vertical sync in bootloader that led to problems with my TV too. Attached is bootloader with slightly different vertical sync. Could you try if it works for you?
by xiaolong
Tue Jan 10, 2017 7:15 pm
Forum: Programming & Software
Topic: Uzebox SD Gameloader V0.4.5
Replies: 179
Views: 101127

Re: Uzebox SD Gameloader V0.4.5

I have been using Atmel Studio 6.2 on Windows to compile bootloader. Tried Atmel Studio 7 too, but it didn't work.
by xiaolong
Wed Sep 21, 2016 8:03 pm
Forum: General Discussions
Topic: Frequent programming defects - bootloader problem?
Replies: 48
Views: 15827

Re: Frequent programming defects - bootloader problem?

Hi Jubatian, nice you have programmer now and it clearly works, too bad my bootloader had problems. Here is a hex file of bootloader to try, hope better luck with this one. For bootloader compiling and programming I use Atmel Studio 6.2 Otherwise have used AVRDude for programming on both Linux and W...
by xiaolong
Sat Jul 09, 2016 9:29 am
Forum: General Discussions
Topic: Frequent programming defects - bootloader problem?
Replies: 48
Views: 15827

Re: Frequent programming defects - bootloader problem?

Tried some modifications to bootloader earlier to get it a bit smaller. I'm sure CunningFellow is more than capable to trim it down on his own but I post these files here anyway, might give some ideas. Size is: Program Memory Usage : 3564 bytes 5,4 % Full Data Memory Usage : 2490 bytes 60,8 % Full E...
by xiaolong
Sat Jul 09, 2016 8:50 am
Forum: General Discussions
Topic: Frequent programming defects - bootloader problem?
Replies: 48
Views: 15827

Re: Frequent programming defects - bootloader problem?

Just something to try if you have programmer. Posted this last year in "Evolution of the SD card API thread" but I guess it went unnoticed: "Noticed that Artcfox had had a problem that games would not start always. There was a similar behaviour on my Euzebox after compiling bootloader from source. A...
by xiaolong
Wed Jan 06, 2016 5:25 pm
Forum: Hardware
Topic: SCART output not taking into account TV input impedance?
Replies: 8
Views: 3648

Re: SCART output not taking into account TV input impedance?

Tried this change that james333 suggested. Seems that not using those 75 Ohm resistors gives just fine picture via SCART. Was using 1 kOhm series resistor for SYNC though.
by xiaolong
Wed Jan 06, 2016 5:18 pm
Forum: Hardware
Topic: EUzebox - a SCART based Uzebox for the EU
Replies: 98
Views: 90080

Re: EUzebox - a SCART based Uzebox for the EU

Was building Euzebox clone and local electronics shop doesn't sell 28.63636MHz crystal or oscillator. Closest they have is 28.322MHz oscillator, which is about 1 % off. Deciced to give it a try and turned out everything works just fine :D Seems that Euzebox is not that picky about the frequency :)
by xiaolong
Sat Nov 28, 2015 7:09 pm
Forum: Programming & Software
Topic: Evolution of the SD card API
Replies: 194
Views: 33653

Re: Evolution of the SD card API

Noticed that Artcfox had had a problem that games would not start always. There was a similar behaviour on my Euzebox after compiling bootloader from source. After disabling interrupts in flashgame() by removing all sei() statements that problem was fixed. Side effect was that progress bar would not...