Because the DSK2ROM tries to emulate disk drive all this is included to ROM-file as well. Most of this stuff is completely useless for the games and could be just as well left away if the game would be in ROM.
(Ocean%20Software)[cr%20Two%20Mag][t%20Two%20Mag].png "sdltrs .dsk roms")
#Sdltrs .dsk roms driver#
The MSX disk handling takes 13KB even without the low level driver routines! This space is used to initialize RAM variables, handle file system, file names, file control blocks etc. Handling disks is actually quite a complex task. You don't need to load it or anything like that. The biggest difference in ROM is that it is all available to use at the very moment you power on your MSX. If you take some small cassette game it will be matter of coffee break to make it a ROM-file, but if you take some huge disk game that loads in between you better buy a lot of coffee to home before you even start. t is much easier just to take assembler & the original files and rewrite the loader. This will make the DSK-file easier to compress and therefore it may compress more. If you want to use the tools then best that you can do is to use fresh DSK-file where you put the files. Unfortunately it also requires some manual work. Usually the size does not change lot since you replace routines instead of just adding emulation layers. This is absolutely the best method and minimizes the overhead caused by using standard containers and heck of a lot of logic glue. I'm sure you can take an emulator save state and start packing that to ROM-file as well, but it is much easier just to take assembler & the original files and rewrite the loader.
Doing packing may help a bit, but anyway more conversion you make -> bigger it gets. If you have 720KB disk, then you need 1MB ROM to make it fit inside. If you have 512KB ROM you need 720KB disk to make it fit inside. Same problem other way around: If you put round box in to square box the square box needs to be quite a lot bigger if you don't start to modify the boxes.Įxample: If you have 360KB disk then you need 512KB ROM to make it fit inside. The problem here is similar to real world problem we all know: When you put square box inside round box, you need bigger round box.
0 kommentar(er)
