Re: Hardware Bypass

Posted on 2010-02-11, 19:10

by

by ripsaw8080

in DOSBox General

in DOSBox General

I guess you're asking about native execution, which is possible (to some extent) on a compatible host CPU. Look up info on QEMU+KQEMU or VirtualBox for examples of virtualizers that allow partial native execution with fallback to emulation. Perhaps DOSBox could do something similar, but it certainly …

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Re: An odd bug that affects King's Quest V - cannot save at first

Posted on 2010-02-09, 22:53

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The problem is that you are not running the game the way the installer sets it up to be run. Normally there is a SIERRA folder with batch files to run the games in their subfolders beneath. The original batch file to run the game specifies the full path to the resource.cfg file (not relative path), …

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Re: DOS box not seeing clock

Posted on 2010-01-31, 21:05

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

DOSBox supports most timing methods used by DOS apps, with the notable exception that it does not allow setting the time via INT 21/2D; however, the timer ticks in BIOS memory can be changed directly. There are probably many reasons the app might not work right (DOSBox is intended for games), but if …

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Debugger disassembly error

Posted on 2010-01-29, 22:05

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by ripsaw8080

in DOSBox Development

in DOSBox Development

I was debugging a program and ran into an instruction that disassembles as "movsx eax,ax", but "movsx eax,al" is executed; which had me thinking there was a CPU bug for a moment. The opcode is 0F BE C0 with a disassembly template of "movsx %Gv,%Eb". The second operand is byte size in the template, …

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Re: Lands of lore disk space problem

Posted on 2010-01-24, 12:06

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

You need to install the game properly. Look up MiniMax's 60-second guide in the guides section.

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Re: DOSBox 0.73 - the only version with OGG support?

Posted on 2010-01-23, 15:13

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by ripsaw8080

in DOSBox General

in DOSBox General

Seems like MP3 should work, but it doesn't; a mystery of sdl_sound that has yet to be solved. CUE/ISO/MP3 does not work

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Re: DOSBox 0.73 - the only version with OGG support?

Posted on 2010-01-19, 05:02

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by ripsaw8080

in DOSBox General

in DOSBox General

Support for file-based audio in cuesheets is through the sdl_sound library, which is considered an optional component in DOSBox builds. You don't have to change any DOSBox code to include or omit stuff that is optional; the build environment takes note of its presence or absence at configuration and …

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Re: Sid & Al's Incredible Toons display issue

Posted on 2010-01-17, 21:47

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Add a "video = yes" line to the RESOURCE.CFG file as a workaround.

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Re: Still can't get right-shift to work!

Posted on 2010-01-14, 20:52

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by ripsaw8080

in DOSBox General

in DOSBox General

Right-Shift / Backslash Keyboard Problems (SOLVED!) I would guess the issue has been reported to MS, but it seems it hasn't been straightened out between Vista and Win7 release...

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Re: X-Com mouse problem.

Posted on 2010-01-10, 23:57

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

You mean cycles problem. Try "cycles=auto limit 8000" in the conf file. Play with the limit to find a speed you like. Also, the tactical mode has an in-game option for the terrain scroll speed.

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Re: Strange Mystery Files?

Posted on 2010-01-09, 10:54

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by ripsaw8080

in Milliways

in Milliways

Executables, including DLLs, will usually have *some* readable text in their headers or library dependencies, even if they are compressed with UPX or some such. Do they at least start with the (in)famous "MZ" executable signature? If not, then they are data files masquerading as executables, and …

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Re: Trouble running Grand Prix Circuit (1988) in DosBox

Posted on 2010-01-01, 21:12

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I wasn't trying to be dismissive if you really want to know why the problem occurs; it's just that not everyone does. ;) SP=2 causes a 16-bit segment wrap of the stack pointer that DOSBox doesn't take into account. The CPU flags that were lost in the wrap with IRET were inconsequential, but the code …

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Re: Trouble running Grand Prix Circuit (1988) in DosBox

Posted on 2010-01-01, 13:28

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

In DOSBox versions after 0.72 there is an issue with GP.EXE regarding an unusually low initial stack pointer specified in the executable header. I have reported specifics of the issue to the devs, and a fix may be made at some point. Thanks for posting about the problem.

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Re: Text appearance problem with a game

Posted on 2009-12-31, 17:22

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

http://www.vogons.org/viewtopic.php?t=21918 It seems to be a regression, but the history is a bit more complicated than that. If you read the linked thread, the issue relates to how character data is rotated. In 0.63 rotation was applied to all write modes, so the game appeared to work OK, but the …

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Re: Disk Serial

Posted on 2009-12-29, 18:33

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by ripsaw8080

in DOS

in DOS

Based on the output from VOL in MSDOS 5, it's a bit tricky to get it perfect using ECHO commands in the batch file, because you have little control over newline characters. I made a mock up that looks correct using two files, attached to this post in a zip file. The volume label in the output is the …

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Re: Disk Serial

Posted on 2009-12-27, 18:08

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by ripsaw8080

in DOS

in DOS

As I explained in your other thread on this subject, the volume serial number of mounted drives in DOSBox is 0000-1234. However, most apps should be able to determine this information through DOS function calls, so you must have an app that doesn't do that for some reason. When you say the app uses …

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Re: Problem using BIOS to display 256 colorset

Posted on 2009-12-23, 23:42

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by ripsaw8080

in DOSBox Development

in DOSBox Development

I think the OP meant 256 text color attributes, and wanted to see intense background colors rather than blinking text. The high bit of the attribute can mean either blinking or intense background depending on a bit in one of the video registers, and the BIOS call wd pointed out can toggle it.

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Re: I Have No Mouth And I Must Scream no video

Posted on 2009-12-22, 21:39

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

It works when any value other than 0xff is read back after being written, so masking any bits at all; but just to be sure I changed it as you specified, and the game works without forcing VESA: case 0x47: /* HGC orgX */ - return vga.s3.hgc.originx&0xff; + return vga.s3.hgc.originx&0x07; The other …

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Re: I Have No Mouth And I Must Scream no video

Posted on 2009-12-22, 20:51

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The game works without forcing VESA in 0.72 (which does have S3 emulation). This CRTC detection code is used: mov dx,03d4h mov ax,4838h out dx,ax ; write 0x48 to index 0x38 (Reg lock 1) mov ax,0a539h out dx,ax ; write 0xa5 to index 0x39 (Reg lock 2) mov al,47h out dx,ax ; write 0xa5 to index 0x47 ( …

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Re: I Have No Mouth And I Must Scream no video

Posted on 2009-12-22, 19:48

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

You do realize you have to change the machine type in the conf file and restart DOSBox? just typing "machine=svga_et4000" at the prompt doesn't actually switch to the other machine type. If I didn't spell it out clearly enough, type "scream vesa" to run with forced VESA.

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