Rmac "Warning: RISC code generated with no origin defined"

[Rmac "Warning: RISC code generated with no origin defined"]

Check that you have not forgotten to put a .org statement before your GPU code.

[Jaguar Rgb issues]

For red, the parts to check are resistor R29 and ferrite L15.

 

If you can, also check that your TV/monitor/converter works correctly with another RGB source.

[Skunkboard: Special Edition (v5) Interest?]

It may be an issue in the game itself. Virtual Jaguar's emulation is not cycle-accurate, so it can "hide" some issues that exist on real hardware (or the opposite). Which is why even if your use VJ for development, it's important to also run the game on real hardware to check everything works right.

[Jaguar Rgb issues]

What kind of video cable are you using?

[Jag PS/2 Mouse adapter problem]

It only works on mice which natively support both modes. Most early USB mice did, but current ones may not.

[Jaguar Cartridge Eeprom failure]

Either you encountered a rare bug, or it was a poor contact problem (the EEPROM has dedicated pins on the cartridge).

[Where can I get documentation for creating an Atari Jaguar?]

Oh boy.

 

The only thing Hasbro ever released is a pretty vague press release claiming the Jaguar was an "open system". They didn't release any technical info, much less "documentation on cloning the console". All the info that's publicly known came from other sources.

 

And even with the current prices, cloning it would require massive efforts and cost a lot more than what the original sells for. This is not an Atari 2600 we're talking about.

 

 

[Bug hunting]

3 hours ago, swapd0 said:

The stack pointer is located at $4000-4 in all games.

I don't mean the stack pointer in the game, I mean the stack pointer in your menu code.

[Bug hunting]

    move.l 4(sp),a0
    move.l 8(sp),a1

If the stack pointer is located at the end of RAM, at that point the values on the stack may have been overwritten by the code you've copied there. Load the values from the stack before copying.

 

Also, check the operator priority there:

    move.w #(_end_copy_run-_copy_run)/2-1,d7

Is it evaluated as ((_end_copy_run-_copy_run)/2)-1, or (_end_copy_run-_copy_run)/(2-1)?

 

 

 

[Jaguar audio clicks]

If you have a way of recording it (preferably directly), it would be helpful to diagnose the problem.

[Video of Japanese people playing the atari jaguar!]

Just ask CyranoJ. He loves answering that question.

 

*ducks*

[Jaguar 18 button controller]

Which makes absolutely no sense. In other words, par of the course for Atari's marketing.

[Why not try port Super Mario 64 without vfx?]

Why settle for Super Mario 64, when DooM 3's source code is open-source? It should be even easier to port, since Doom already exists for the Jaguar.

[Announcing a rogue-like RPG for the Atari Jaguar]

As a compromise, you could make it possible to hide/show the console by pressing a button, and/or using a transparent or translucent background instead of the solid black one.

[UK Customers can't be sent games by Atariage anymore / European maybe next]

12 hours ago, carlsson said:

I'm not sure that music records were part of the 142 types of items.

Maybe JagCD games could be sold as audio CDs, then. Technically, it's even almost true

[Red Screen of Death Help]

The Skunkboard is 16-bit wide, normal carts are 32-bit wide. A fault in the buffering for the upper data bits could explain the symptoms.

[GPU interrupt & GPU Object]

Also, if you're using C, make sure every variable that's accessed by both the 68k and another processor has the volatile keyword in the declaration:

https://barrgroup.com/embedded-systems/how-to/c-volatile-keyword

 

Otherwise you'll have endless weird and hard-to-find bugs.

[GPU interrupt & GPU Object]

Isn't it basically how you wrote Jagtopia?

[MiSTer FPGA & JagStudio (Do not do this for now)]

Some people like claiming that programming the Jaguar is extremely complicated because there are too many hardware bugs. Maybe that MiSTer core is a solution for them, when they find out the real thing is not that bad after all

[Red Screen of Death Help]

Check the motherboard carefully for damaged traces.

 

If all continuity checks pass, one possibility is that one (or several) of the bus buffer chips (U12, U14, U17, U19, U22, U26, U30, U31) is defective.

[Well... I did it... :(]

8 hours ago, Sauron said:

a lot of us here need to take a chill pill and not get so wound up

Sir, this is the Jaguar forum...

[Jagtopus v2 interest check]

I've been informed that someone else in the Jaguar community has been working on a very similar project that's almost complete -- it's just not been announced publicly yet. Since there would be no point in having two different carts that do the same thing, I'll let this person unveil their project when they're ready.

 

But I have another idea for a related project that's not quite the same thing. So, stay tuned

[Jaguar CD won't display running out of ideas]

Not that I remember.

[Jaguar CD won't display running out of ideas]

Desolder those ICs and check the rails again.

[Jaguar CD won't display running out of ideas]

Before replacing them, have you checked whether the output voltages are correct, and if not, if there is a short between output and ground?