Provided that I'd go for a megarom (by far simpler), maybe a solution exits:
(just guessing, not all the following points have been verified)
Assumptions:
- all disks allow 512 bytes per sector or more;
- sector access is allowed by the msx standard at bios level using documented calls;
- the disk can read data from sectors at higher speed than they are needed by the music replayer.
Proposal:
- you store the picture and the music data in a custom format based on sectors: say each sector holds 100 bytes for music, 412 for picture (just guessing);
- the music replayer guides the disk access: each time it ends the current music chunk, it reads a new sector retriving the need music data and a new picture segment.
If the BIOS lag is low (as it should be) the music should keep playing and the loading time of the new picture should be linked to the music lenght.
Could it work?
@ARTRAG
Mh! This sounds quite far from the reach of my current coding capabilities but it sounds worthy...
Damn... there are so many knowledges I have to learn or revise...
