Re: A program I've made works in VirtualBox and QEMU, but crashes under DosBox

Posted on 2023-01-07, 16:06

by

by ripsaw8080

in DOSBox General

in DOSBox General

0ba45h masks the EFLAGS bits in AH to retain and the FPU condition flag bits in AL to merge. It takes advantage of the fact that the condition flags (carry, parity, zero) are in the same relative positions in both registers, which is almost certainly by design. Note that I didn't include the …

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Re: A program I've made works in VirtualBox and QEMU, but crashes under DosBox

Posted on 2023-01-06, 16:59

by

by ripsaw8080

in DOSBox General

in DOSBox General

FCOMIP just saves you the work of manipulating EFLAGS, so you could use FCOMP and merge the condition flags the hard way, for example: Copy code to clipboard 1 fcomp 2 push ax 3 fstsw ax 4 mov al,ah 5 lahf 6 and ax,0ba45h 7 or ah,al 8 sahf 9 pop ax Maybe make it a subroutine if used a lot.

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Re: Looking for an old arcade game

Posted on 2022-12-22, 04:56

by

by ripsaw8080

in Console & Arcade Emulation

in Console & Arcade Emulation

Not isometric, but otherwise seems to fit your description: https://www.youtube.com/watch?v=LNzgP3gw0B0

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Re: DOSBOX - numeric keyboard.

Posted on 2022-12-20, 19:26

by

by ripsaw8080

in DOSBox General

in DOSBox General

Going by the screenshot, you appear to be using an unofficial build of DOSBox that uses True Type Fonts, and also using it through some kind of remote desktop. Only official source builds of DOSBox are supported here, so please ask your question where the unofficial build of DOSBox is being hosted. …

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Re: Will there ever be microphone input?

Posted on 2022-12-16, 15:10

by

by ripsaw8080

in DOSBox Development

in DOSBox Development

Microphone input is not a development priority because it is rarely used by games. However, DOSBox uses the SDL library, which I believe does support microphone input, and open source means someone could develop the feature unofficially. If a microphone input patch works well and doesn't add too …

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Re: games on consoles you wish were released on PC

Posted on 2022-12-06, 10:27

by

by ripsaw8080

in Milliways

in Milliways

Shadow of the Colossus, PS4 upgrade version of course. Sony seems somewhat open to porting their exclusives to PC, e.g. God of War and Uncharted, and they acquired Bluepoint Games, so one can hope...

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Re: Touché: Stuck note on SC-55

Posted on 2022-12-05, 23:02

by

by ripsaw8080

in DOS

in DOS

Hmm, perhaps the game developers tested with a synth that is immune to the out-of-sequence events and so didn't notice the issue. I'll see if there's a way to identify the b0rked events that isn't too tedious... in the meantime you can just reconcile it as an "annoying bug authentic" game bug. 😉

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Re: DosBox 0.74-3 and Turbo Image 1.01a does not activate the virtual Floppy Drive A:

Posted on 2022-12-04, 18:42

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

SVN does indeed refer to subversion, which is the source code control system used by SourceForge.net, the repository of official DOSBox source code. However, SVN is typically used here on the forum to refer to the latest revision of the source code under development. https://www.vogons.org/viewtopic …

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Re: DosBox 0.74-3 and Turbo Image 1.01a does not activate the virtual Floppy Drive A:

Posted on 2022-12-03, 21:00

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Use an SVN build of DOSBox, it can mount multiple floppy images (raw format) directly, no need for any other software. Example command: imgmount a d1.img d2.img d3.img d4.img -t floppy Pressing Ctrl-F4 switches images. Note that, as in the example, using short filenames for the images is a good idea …

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Re: Touché: Stuck note on SC-55

Posted on 2022-12-02, 17:13

by

by ripsaw8080

in DOS

in DOS

Most likely you have a different version of the game. You can search for the byte pattern 33 80 3E 5C 00 90, of which the 80 and 90 bytes are the ones to change to 90 and 80. In the file you have, the offsets appear to be 16740A3 and 16740A7.

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Re: Touché: Stuck note on SC-55

Posted on 2022-12-02, 15:01

by

by ripsaw8080

in DOS

in DOS

The usual way would be to copy the cdrom file and directory structure to a directory on hdd and mount the hdd directory as a cdrom -- in DOSBox you'd mount with the "-t cdrom" switch, in real DOS you'd mount with FAKECD or the like. You can then modify the files on hdd. Faking a cdrom often works, …

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Re: Touché: no MIDI music?

Posted on 2022-12-02, 00:01

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Guys, the forum has a search feature. 😉 Touché: Stuck note on SC-55

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Re: 256 or more colors for games in Window 3.x?

Posted on 2022-11-28, 16:05

by

by ripsaw8080

in Marvin \ Video

in Marvin \ Video

Increased color depth can avoid, or at least minimize, dithering in games that use video. I remember this being particularly true for QuickTime video.

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Re: Game environments that left a lasting impression

Posted on 2022-11-03, 14:46

by

by ripsaw8080

in Milliways

in Milliways

Nox - Westwood gave it a lot of atmosphere despite an isometric view. Morrowind plus addons - I can't be the only one that was impressed.

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Re: Super Zaxxon - is standard CGA mode possible?

Posted on 2022-11-01, 17:07

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

If the "commonly available dump" you refer to is the one from Retrograde Station, its RGB variant is broken (probably due to bad or missing sectors), and because of this the game's option menu has been hacked to prevent switching between Composite and RGB (you can see the option to switch but can't …

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Re: How to fix mouse not working I Windows 3.11

Posted on 2022-11-01, 07:11

by

by ripsaw8080

in DOSBox General

in DOSBox General

It's more likely the display driver is not drawing the pointer correctly than the mouse is not working. See the Windows 3.x guide in the guides section of the forum for the recommended S3 display driver to use with the machine=svga_s3 setting.

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Re: SHARE.EXE in Windows 3.11 WFWG under DOSBox

Posted on 2022-10-31, 13:07

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I noticed a warning in the guide about file corruption. I know this is a vague question, but do you think that it would cause any problems with ATC Workshop? It will probably work without problems in situations where there is only single-user access to files . File corruption can occur in multi- …

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Re: SHARE.EXE in Windows 3.11 WFWG under DOSBox

Posted on 2022-10-30, 21:32

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

SHARE.EXE will only work if you boot real DOS in DOSBox, it does not work in the internal emulation of DOS. In the Win3.x guide in the guides section of the forum you can find FAKESHAR.COM which may satisfy the application's check for SHARE.EXE, but as its name implies it does not actually provide …

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Re: Fantavision aspect ratio

Posted on 2022-10-11, 03:29

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

What you are noticing is the effect of pixel aspect ratios. The developer of the software in question created the circle as if pixels have a 1.0 aspect ratio (as high as they are wide), but when viewed at a resolution that does not have a 1.0 aspect ratio the circle appears more oval than circle. …

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Re: Which method for enabling the A20 line works in DOSBox?

Posted on 2022-10-10, 03:04

by

by ripsaw8080

in DOSBox Development

in DOSBox Development

The most direct way to control the A20 line is with bit 1 of port 92h, but as already mentioned there are XMS functions which might be a better choice to use because they manage the state of the A20 line across possible multiple client situations. Keyboard hardware methods of controlling the A20 …

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