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Re: Some of your video modes are incorrect.

Posted on 2015-03-27, 23:17

There's still this problem though. Of the above list of modes, there's also this subset of modes that appears black and white in DosBox, even though they should be in color according to the specs. = 0D 320x200 16 color graphics (EGA,VGA) = 0E 640x200 16 color graphics (EGA,VGA) = 10 640x350 16 color …

Re: Some of your video modes are incorrect.

Posted on 2015-03-27, 23:02

However the screenshot you take with Ctrl+F5 is SUPPOSED TO save the actual pixels, Says who? That's what I've observed it do with all other modes. For example, mode 0x13 is 320x200 with 256 colors. Now the DosBox main window shows it at 640x400 for ease of viewing. But the screencap saves it at …

Re: Some of your video modes are incorrect.

Posted on 2015-03-27, 22:28

Of the above list of modes, there's also this subset of modes that appears black and white in DosBox, even though they should be in color according to the specs. = 0D 320x200 16 color graphics (EGA,VGA) = 0E 640x200 16 color graphics (EGA,VGA) = 10 640x350 16 color graphics (EGA or VGA with 128K) …

Re: Need to add MHz simulation

Posted on 2015-03-27, 21:57

mr_bigmouth_502 wrote: IIRC the only PC games that were targeted towards a specific clockspeed were some of the CGA booter releases from the early-mid 80s. Play the game Dark Ages from Apogee Games, and you'll notice it is WAY too fast on modern CPUs. That's because the old games like that depended …

Re: I found a bug in DosBox

Posted on 2015-03-27, 21:26

Where is it written that you have to use the /s parameter when formatting a disk? That switch is an option that transfers the DOS software to the disk after it is formatted. Seriously, at this point you are only further demonstrating your ignorance of simple concepts. I suggest you have fun …

Re: I found a bug in DosBox

Posted on 2015-03-27, 20:59

You are allowed to distribute disks formatted by MS-DOS And that's exactly what a boot disk is. A boot disk is a floppy disk that has been formatted with the command "FORMAT.COM /s a:". This command run from another floppy disk (such as drive B), or from a harddisk containing FORMAT.COM, will …

Re: I found a bug in DosBox

Posted on 2015-03-27, 18:05

MS-DOS is a copyrighted work, and you do not have the right to distribute it, in part or in total . Your views on what is legitimate are erroneous, and you cannot use the illegal distribution of MS-DOS on other websites as justification for trying to distribute it here. As for DOS compatibility …

Re: I found a bug in DosBox

Posted on 2015-03-27, 17:52

First of all, it was not DOS. It was a "DOS boot disk", not a "DOS install disk". A DOS boot disk is NOT illegal to distribute, as it only contains the essential 3 files to boot the computer (IO.sys, MSDOS.sys, and COMMAND.com), and possibly will also have FDISK and FORMAT. These specific "baseline" …

Re: I found a bug in DosBox

Posted on 2015-03-27, 12:29

Attached here is a zipped copy of the disk image that has 4 test programs (they each have a different test pattern, though each has the same set of options). They are called Test1.com, Test2.com, Test3.com, and Test4.com. After running one of these test programs, hit one key from the first list, and …

I found a bug in DosBox

Posted on 2015-03-27, 12:14

Looking at http://stanislavs.org/helppc/int_10-0.html I noticed that video modes 8, 9, and 10 (0x0A) are supposed to be for PCjr. I wrote a program in assembly language program and compiled with NASM. I tested it in DosBox in PCjr mode, but video modes 8, 9, and 10 all crashed. Reading other docs I …

Re: DOSBox-X branch

Posted on 2015-03-25, 12:47

Well... DOSBox has different goals than DOSBox-X. It's been stated pretty clearly on these forums that DOSBox (the main branch) cares only about getting DOS games to run. DOSBox-X cares more about accurately emulating the hardware and documenting what PC hardware is like through emulation, and for …

Re: Some of your video modes are incorrect.

Posted on 2015-03-25, 12:32

It's not DOS that support these video modes, but the BIOS, either the mainboard's BIOS or the BIOS on the EGA/VGA card. All modes with 200 lines would be displayed with 400 scan lines on a VGA screen. Having the option to save the raw pixels as opposed to the displayed image would be nice, but not …

Re: Need to add MHz simulation

Posted on 2015-03-25, 10:38

The purpose of DosBox is to emulate every game that has been written for dos, so that even with a modern PC, those games will be able to be played as they were intended to be played. This means that, for example, if game "xyz" is CPU speed sensitive, and is designed to run on a CPU running at …

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