Zerosquare

Thanks

No problem

Nope This is a forum for Jaguar development ; for Atari computers, ask on Yaronet and/or Atari Forum

Nice ! The cutouts on the side are not symmetrical

Tell me you're not building a flash cart... otherwise you're doing a lot of work that's already been done

What are you up to ? TXD and RXD are the I²S data pins for audio, and are directly connected to the same pins on the DSP port ; they're used by the JagCD to stream audio tracks, for example. Together with SCK and WS, they form a synchronous, full-duplex serial port ; SCK is the bit clock (its frequency is equal to the baud rate) while WS is used to identify which bit is the MSB and which channel (left or right) is being transmitted. There's a detailed timing diagram of how I²S works in the datasheet for the audio DAC. Those signals are not related to the UART used for networking. UARTO is the output (TXD) of the UART, and UARTI is the input (RXD). They're the same signals than those on the DSP port, which are used by the JagLink, etc. Yes, this is the chip select for the cartridge space ; you can't get rid of it, sorry ! /EOE1 (pin B22) is active for read accesses to bits 31..16, /EOE0 (pin B23) is active for read accesses to bits 15..0. AFAIK, yes, it's correct. Correct ; if your cart is 32-bit, you don't need to connect A0 and A1. /EWE0 is low during write accesses to bits 7..0, so it should be connected to /WE if you've got RAM or Flash memory on your cart, etc. /EWE2 is the same thing for bits 23..16. ERW indicates whether the current bus cycle is a read or a write, but I don't remember the polarity. Ask SCPCD Pressing * and # together doesn't do anything particular on the hardware side ; the game has to detect and handle in software. /RESET is active only on power up (it's longer than a few milliseconds, but I don't remember how much ; that's another thing for SCPCD to answer), when the cart asserts /RESETI, or when you press the reset button if you've added one

It may be a little difficult to get... Try eBay and the "sales" areas on Atari forums/websites. You can also build you own cable is you know how to use a soldering iron, but the video connector is hard to find. In which country are you located ?

Well, according to the law, you don't have the right to download a ROM image even if you own a physical copy, you're supposed to dump it yourself Actually I wrote it for someone who had an Atari flashcart and thought there was a beta of a game on it, but it turned out that it was bit-identical to the released version. And maybe, one day, someone will find something rare that hasn't been dumped already... It can also be useful if you're testing hardware, or, say, developing a flash cart or something like that yourself

Ah yes, with development hardware/software you can do some neat tricks ; I was talking about the "stock" system

The RGC association is happy to announce the upcoming AC 2011, which will take place on April 16th and 17th. This 6th convention dedicated to 8, 16 and 32-bit vintage computers will be located in Congis (France) in a friendly atmosphere. As usual, software and hardware presentations will be featured, as well as the yearly Medieval Mayhem tournament (on Atari 2600). You'll also be able to discover and play freely on machines from those iconic brands. For 3 years, the AC has included a gaming-centered speed-coding contest. Previous editions have seen the birth of ambitious projects. A new challenge in 2011? We'll let you know more soon. If you're an Atari, Amiga, Commodore, Amstrad, MSX, Thomson (or any other brand you'd like to promote) enthusiast, you'll be welcome. Be sure to circle the date on your calendar not to miss this must-attend event for the retro-gaming community. For more information: www.retro-gc.org

Now, who's gonna code a Portal-like game for the Jaguar ?

Here are my pictures : http://zerosquare.free.fr/ac_2011/

Thanks for releasing that ; that's the kind of program which is really useful to have in your "toolbox"

Tyrant : Thanks, it's working now.

Nope, still doesn't work Does it work for you if you logout from Facebook ?

I get an error page that doesn't say much ("the content is currently unavailable", blah blah). Maybe a Facebook account is required ? (BTW, to those using Facebook to host photos : please stop doing this ; some people would like to see your pictures without needing to subscribe to a clunky website with dubious ethics . Thank you.)

Thanks.

There are plenty of them here I've been too busy to upload mine yet, but I'll do it soon.

Wow ! Nice work !

Don't apologize, we all make mistakes, especially when playing with new stuff. Your posts may be useful to someone else having the same problem

I hope you all had a great time this weekend. Special thanks to sh3, LinkoVitch and Mug UK for coming from far away ! PS : this Cadbury chocolate stuff tastes really good ; thanks again for that

Very nice game

Ah, you've made a small mistake 625 (or 525) is the number of lines per frame, but 50 Hz (or 60 Hz) is the field frequency. As a frame is made of two fields, there's a 2x factor you have to include. Another way to get the result is to consider the horizontal video period : 64 µs for PAL, 63.555... µs for NTSC. That gives us (26.5939 * 10^6) * (64 * 10^-6) = 1702.0096 for PAL (rounded to 1702), and (26.590906 * 10^6) * (63.555... * 10^-6) = 1689.98503083 (rounded to 1690). For OP time calculations, SCPCD is the person to ask

You're right, it's not that simple, I made a mistake Sorry ! (thanks to SCPCD for noticing it). It's actually 1702 cycles for PAL, and 1690 for NTSC. I used the horizontal period register value as a basis, but forgot that it was the duration of a half-line, not of a complete line.