4 replies to this topic

[Heaven/TQA]

Hi Eckhard,

just for a no reason i wanted to spend some hours on coding 7800... i have tried to include another RMT tune than delta in your RMT demo but i failed with RMT 1.14... what is wrong???

my experience showed that just delta is working???

have you tested others than that module?

any help much appreciated

cheers,

[Heaven/TQA]

sorry. question answered myself... as it states in the source file "export song at $d000"

and this is what i have done with rmt 1.14, export a demo tune as RMT at $d000 (all entered in the export dialog... test was one of sack's tunes).

[Eckhard Stolberg]

So you got it working now, right?

Some other things you need to keep in mind:

The 7800 only has one POKEY, so you can only play songs with a maximum of 4 channels. Most RMT demo songs seem to use 8 channels.

The 7800 player routine was converted from the player that came with RMT 1.12 (I think). Since then Raster made some changes in the player routine. So songs that use the new features of RMT 1.14 won't play properly on the 7800 either, unless the 7800 player routine was updated as well.


Ciao, Eckhard Stolberg

[Heaven/TQA]

yup... one problem solved...next appeared...

i wanted to modify your small demo...

exchanged the delta rmt music with another one... worked...

now... the mass started...

i wanted to integrate the taquart logo i used in my sensodx game... it should be loaded from $8000-$bfff (12k)... but just including in the source it mess doesnt want to start the cart...

ok... then i realised that you configured your own header... so i changed the header to start at $7f80 right before the code starts... but it doesnt work... (maybe because at $8000 is just data? no code? your code starts at $f000)

then i tried to remove your header completly and let 78hdr writing the header but it does not work either...

so... any help here needed...


damned 7800 beast...

Attached Files

•  test.zip   163.2K   135 downloads

[Eckhard Stolberg]

Hello Karolj,

sorry, but I don't have much time to experiment with your code at the moment. But the A78 header contains some information about the ROM size (the four bytes after the game name), so if you are making the ROM bigger, you have to adjust that value too. I don't know much about 78hdr, but I'd expect it to set this value properly though. Also you need to generate a new signature key with A78SIGN, if you want to use the binary with the NTSC version of the 7800 BIOS.


Ciao, Eckhard Stolberg