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Re: Quick Basic 4.5 - Using int 21h, 4bh to launch external programs

Posted on 2023-07-09, 11:32

in Milliways

in Milliways

a program that wants to load other program must first reduce the memory that DOS has assigned to it and keep only what it needs. this qb program and its stack sure fits in 1 KB, so bx = 1024/16 and call int 21/4a to modify allocated memory block. somethin' like this... mov bx,1024/16 ; new requested …

Re: DOSBox Pure ?

Posted on 2021-01-08, 07:27

in Milliways

in Milliways

- Search memory for values. you save a few "bpm segment:offset && memdumpbin segment:0 ffff && xxd MEMDUMP.BIN |grep $values" , pretty handy if you ask me!

Re: Are there kryoflux-like devices for optical drives?

Posted on 2021-01-05, 18:17

in PC Emulation

in PC Emulation

For 1: 1 CD backups, a device with a firmware that does not correct checksum read errors would be a good starting point. If the device behaves like this, it would be the closest thing to KryoFlux for CDs that I can think of.

Re: BIN/CUE to ISO/CUE converter v1.07, supports : FLAC,MP3,OGG,OPUS (script)

Posted on 2020-10-26, 01:38

in DOSBox General

in DOSBox General

I would not expect a .bin file containing both data and audio tracks to use mode1/2048. All sectors in a source file should be the same size, so the data track should be mode1/2352 (or mode2/2352, sometimes) to match the audio tracks... Otherwise how do you determine the file offset given by the …

Re: BIN/CUE to ISO/CUE converter v1.06, supports : FLAC,MP3,OGG,OPUS (script)

Posted on 2020-10-25, 12:54

in DOSBox General

in DOSBox General

Akuma wrote on 2020-10-25, 12:30: EDIT: Could you try this ? […] Show full quote EDIT: Could you try this ? Copy code to clipboard 1 to_frames(){ set ${1//:/ }; echo $(((60*10#$1+10#$2)*75+10#$3));} Fixed 😀

Re: BIN/CUE to ISO/CUE converter v1.06, supports : FLAC,MP3,OGG,OPUS (script)

Posted on 2020-10-25, 12:12

in DOSBox General

in DOSBox General

Yes please, edge cases are welcome. I think I read out the CUE file 'MODE' to determine if its an ISO or BIN. EDIT: I did :D grep -q 'MODE2/2048' "$cue" && exit 102 Well, I'm afraid it's not enough. :( Pinball Dreams II (echo ZVhvRE9TIHY0 |base64 -d) has this CUE: FILE "PDdlx.bin" BINARY TRACK 01 …

Re: BIN/CUE to ISO/CUE converter v1.06, supports : FLAC,MP3,OGG,OPUS (script)

Posted on 2020-10-24, 23:43

in DOSBox General

in DOSBox General

I've used my script to convert many many BIN/CUEs, so I've come across a few edge cases. Maybe that's useful to you. For example, Pinball Dreams II (echo ZVhvRE9TIHY0 |base64 -d) and others are really ISO/CUE. If you don't control it, the script will fail because bchunk writes the data track to …

Re: Best way to create ISO+OGG images?

Posted on 2020-10-23, 18:40

in DOSBox General

in DOSBox General

Well done! 😁 Since you have asked, I would say Consider implementing things when you actually need them. Keep it simple. 😉

Re: How do you deal with multiple dosbox configurations ?

Posted on 2020-10-19, 16:20

in DOSBox General

in DOSBox General

It's actually that Windows is more forgiving. In Windows both of the following work: cd "My Directory\My Subdirectory" and: cd "My Directory"\"My Subdirectory" In Linux, only the first is valid. Actually in Linux both are valid, as long as you use the Linux dir separator / cd "My Directory/My …

Re: Best way to create ISO+OGG images?

Posted on 2020-10-17, 16:48

in DOSBox General

in DOSBox General

Sure, do whatever you want with the code. I'm glad it's useful to you. 😀

Re: DOSBox ECE (for Windows & Linux)

Posted on 2020-02-11, 12:37

in DOSBox Development

in DOSBox Development

Actually about 30. Revised list of Voodoo games for DOS.

Re: Guide to the DOSBox debugger

Posted on 2020-01-18, 10:34

in DOSBox Guides

in DOSBox Guides

Just NOP the opcodes you don't want. For example, if you have this instructions: 267E:6CE3 8BD7 mov dx,di 267E:6CE5 8BDE mov bx,si 267E:6CE7 1E push ds To skip "mov dx,di" -> SM 267E:6CE3 90 90 To skip "push ds" -> SM 267E:6CE7 90

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-12-12, 20:36

in DOSBox Development

in DOSBox Development

I've never compiled ECE on raspberry. However the following works for me in debian x64. 1. Download and extract DOSBox ECE rXXXX (Linux source).7z https://dosboxece.yesterplay.net/download/ 2. Copy sdk2_*.h from OpenGlide source (OpenGLide_XXX_src.zip) to the ECE's include directory. https:// …

Re: DOSBox-X branch

Posted on 2019-12-05, 23:05

in DOSBox Patches

in DOSBox Patches

Yes, you can write register values into memory.

Re: DOSBox-X branch

Posted on 2019-12-04, 12:39

in DOSBox Patches

in DOSBox Patches

Well, I've manage to locate where the problem is. For anyone interested the following patch will let you write bytes AC, AF, CF and DF in memory. --- debug.cpp.ORIG 2019-12-01 01:27:21.000000000 +0100 +++ debug.cpp 2019-12-04 13:19:02.243257342 +0100 @@ -1330,10 +1330,6 @@ else if (strncmp(hex, "FS …

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-11-14, 17:42

in DOSBox Development

in DOSBox Development

In dosbox image filenames in cue files are case sensitive in linux. That is the error you get if the image file is for example rayman.bin but in the cue file you have rayman.BIN

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-11-14, 17:23

in DOSBox Development

in DOSBox Development

Linux is case sensitive. Open the CUE file and check the file names.

Re: Writing a patch in ASM

Posted on 2019-11-13, 11:04

in DOSBox Games/Apps

in DOSBox Games/Apps

You're right. In nasm data labels are automatically treated as addresses, unless they are enclosed in square brackets. Thanks for pointing it and happy coding 😁

Re: Writing a patch in ASM

Posted on 2019-11-10, 00:04

in DOSBox Games/Apps

in DOSBox Games/Apps

I see why ES should be preserved, but even if ES is destroyed, the loader works nevertheless. Even if I comment entire EXEC_INFO it still works :confused: , so I'm leaning toward DOSBox doing some magic and requiring only DS:DX pointing to the ASCIIZ filename. I bet this wouldn't end well in pure …

Re: Writing a patch in ASM

Posted on 2019-11-09, 20:13

in DOSBox Games/Apps

in DOSBox Games/Apps

Well, this is not my code ;) I have written: lea bx, EXEC_INFO and not: mov bx, EXEC_INFO LEA != MOV. LEA (or PUSH and POP, as ripsaw8080 said) should eliminate 2nd issue. Maybe with nasm you must write: lea bx, [EXEC_INFO] But well, I'm not an expert, but if you want to use my code as a base, my …

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