2 things that would improve DOSBox at minimal developer inconvenience:
1) an option to precisely emulate the clock speed of the original IBM-PC (approx. 4.77MHz). Otherwise the users have to 'guess' the right speed which is not very satisfactory.
2) ability to boot .IMG files a la Flopper.
Plus a few bug fixes that have not been done yet - see other thread.
You can boot from images now.
wrote:1) an option to precisely emulate the clock speed of the original IBM-PC (approx. 4.77MHz). Otherwise the users have to 'guess' the right speed which is not very satisfactory.
2) ability to boot .IMG files a la Flopper.
1. Not possible (or more precisely not worth the effort - it would be a lot of work to time everything as in reality, it would introduce significant overhead and it would influence just the oldest games - newer ones do not need it).
2. It does exist. Read README and search forum (command BOOT).
Mirek
1) Surely not THAT hard: most emulators have quite precise speed emulation. And the oldest games are of course the best; and the newer games tend not to need DOSBox so much.
2) BOOT SPACESTR.IMG -l a
or just BOOT SPACESTR.IMG
Opening image file: spacestr.img
Cannot open bootdisk file. Failing.
Cannot open spacestr.img
Eh!? What is this all about!?
Booting works. Perhaps one thing: the image from which you boot must be on already mounted disc. So for example put the image to c:\dosbox
and "mount c: c:\dosbox" before booting
Mirek
wrote:1) Surely not THAT hard: most emulators have quite precise speed emulation. And the oldest games are of course the best; and the newer games tend not to need DOSBox so much.
That's because they emulate a specific CPU. Dosbox do not. They may both be emulators but that doesn't mean they work the same way.
Found the problem; the game has to be named, eg. DISKIMG1.IMG for some bizarre reason. Then you can go:
BOOT DISKIMG1.IMG
and it will work fine.
That's odd, how can DOSBox run MS-DOS programs on PPC-based machines such as the Pegasos without doing CPU emulation?
wrote:That's odd, how can DOSBox run MS-DOS programs on PPC-based machines such as the Pegasos without doing CPU emulation?
DOSBOX emulates processor. I think the guy meant that instruction timings differed on different Intel processors.
Anyway: instruction timing is not emulated (it would mean adding unnecessary overhead) and also other emulated things are not timed precisely as in reality (the same reason). So the relative speed of DOSBOX is influenced by what is being done (some things are emulated quicker, some slower).
Mirek
