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SVGA/VESA programming

Posted on 2022-06-20, 05:47

in Marvin \ Video

in Marvin \ Video

Not sure this question belongs here, but its the closes topic section of Vogons I could find. If there is DOS development section here, please, redirect me. As I am trying to get further in DOS programming than I managed back in the day, I am learning to tackle SVGA. VESA support detection and a …

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-20, 05:25

in DOSBox Games/Apps

in DOSBox Games/Apps

Sorry for teh confusion, the erratic movement was due to using remote desktop on my laptop and running the program on my work PC this way. I know, I know, but when running it in the virtual box the same way it worked okay, so it did not occur to me as the possible cause. I tried it on my real old PC …

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-06, 05:06

in DOSBox Games/Apps

in DOSBox Games/Apps

Just tested again on my work PC, the movement is no longer jerky, I dont get it. The BX problem is still somewhat active, the program works just for the first time (when executed from the IDE), the following runs it just ends immediatelly (the LMB is still acting as if pressed). But when I have a …

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-04, 16:44

in DOSBox Games/Apps

in DOSBox Games/Apps

Sure, I tested the executable now on my home PC with DOSBox 0.74-3 and it works perfectly. It must be something with my computer at work I guess. I will try again on Monday.

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-03, 09:22

in DOSBox Games/Apps

in DOSBox Games/Apps

I tried a version of SDL.dll from 2010 which is about 1/3 smaller than the one that comes with the SVN build and no dice, its the same. Can't test with the one that comes with the unofficial build as the file is not there, its probably linked with the main .exe.

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 11:45

in DOSBox Games/Apps

in DOSBox Games/Apps

Its not easy to explain. The code is the same. I tried about the same mouse moves in official DOSBox and then in the unofficial build (the second image): https://imgur.com/a/mfW9enO https://imgur.com/a/olgxS9g Both have mouse sensitivity 100.

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 11:37

in DOSBox Games/Apps

in DOSBox Games/Apps

Then I simply draw a bitmap on the mouse coordinates with Copy code to clipboard 1 VESA_DrawImage640(Mouse.x, Mouse.y, image, 20, 20); not even erasing it afterwards so I can see how it travels.

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 11:35

in DOSBox Games/Apps

in DOSBox Games/Apps

Of course, I can share the code. Its just that the code works compiled and both on a real pc and virtual pc even in the IDE. And also in the unofficial build of DOSBox. #include #include "mouse.h" typedef struct { int x, y; unsigned char lmb, rmb, mmb; } MOUSE; MOUSE Mouse; int MOUSE_Detect(void) { …

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 10:01

in DOSBox Games/Apps

in DOSBox Games/Apps

Nice, this build does solve the issue too. Alas for some reason it completely broke my mouse routines (and its just the basic stuff of INT 0x33). The cursor now goes haywire in weird directions. Was there a change of the built-in mouse driver? It seems to either jump off the screen (the default …

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 09:03

in DOSBox Games/Apps

in DOSBox Games/Apps

Not sure if thats what you meant, but I tried this SVN DOSBox-X v0.84.0 (2022/05/31) and it does solve the mouse problem, thank you! I would prefer to stay with the official version, hopefully the fix will find itw way into 0.74-4 when its out.

Re: Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-02, 08:48

in DOSBox Games/Apps

in DOSBox Games/Apps

Thank you for your reply. I am using 0.74-2 actually so will try the latest one. The SVN one if I can find it. EDIT: In 0.74-3 the problem persists.

Borland Turbo C++ 3.1 and mouse

Posted on 2022-06-01, 12:45

in DOSBox Games/Apps

in DOSBox Games/Apps

As I am (again) getting back to DOS programming in C/asm, I have stumbled upon a delicate mouse problem. After initializing the mouse, using interrupt 0x33 service 3 I read the registers to get the mouse status. Registers CX and DX work fine, but BX acts weird. I have a simple loop waiting for left …

Re: Cannot (m)alloc 64k block for a VGA double buffer

Posted on 2020-06-09, 17:15

in DOSBox Development

in DOSBox Development

Will check that, thanks root42.

Re: Cannot (m)alloc 64k block for a VGA double buffer

Posted on 2020-05-26, 10:23

in DOSBox Development

in DOSBox Development

To ressurrect this thread with at least a partial solution :-) Last time I managed to solve it, perhaps by some setting in the Borland C++ IDE, but then forgot it again :-( Now, toying again with the old PC and some C I have found out, that it maybe has to do with the version of the IDE. When I …

Re: Cannot (m)alloc 64k block for a VGA double buffer

Posted on 2018-09-10, 12:15

in DOSBox Development

in DOSBox Development

I am going to run it on a Pentium 75MHz so it would be fine, but it would be nice if I was able to run it on a, lets say, a 486DX/40 or similar machine too. Yea, making everything 'far' (or 'huge') is a bruteforce way of using the full 640k memory (you still won't be able to take advantage of XMS or …

Re: Cannot (m)alloc 64k block for a VGA double buffer

Posted on 2018-09-10, 11:04

in DOSBox Development

in DOSBox Development

#include Try adding that to the top of your source file if you haven't already, as I think it's needed to get malloc() to use the chosen memory model. Thanks, I tried that when testing farmalloc, for malloc it doesnt seem necessary though. Note that in DOS, you are working with 16-bit segmented …

Cannot (m)alloc 64k block for a VGA double buffer

Posted on 2018-09-10, 09:15

in DOSBox Development

in DOSBox Development

Not sure if this is the right place, but it has to be connected with DosBox. After more than 10 years I have come back to try DOS C (with a bit of asm) programming, remembering more than I expected. But I got stuck not far from the beginning - I can init the clasic mode 13h and put some pixels, yet …

Re: MT32 Tracker

Posted on 2017-07-28, 09:51

in MT-32 General

in MT-32 General

Good to know 😀 It should work just fine as the tracker only uses the default patches... well, more precisely the current loaded patches. Weird posting a message here every five years or so 😊

Re: MT32 Tracker

Posted on 2011-11-09, 11:12

in MT-32 General

in MT-32 General

Hey, if you ever come here again :-) I tried contacting you as I was unable to log in, with no luck. Now I just got through. Havent toucht the tracker frankly, but I wondered if you might have give it another try and as I liked your Praises track a lot, I would be very interested in hearing what you …

Re: New program I'm writing: Ubermid. A retro looking game midi player

Posted on 2007-12-18, 17:59

in Milliways

in Milliways

I see you too share the partiality to the text mode like I do 😉 The program works just fine, it is a good start to a multi-format player. Good luck! 😀

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