Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-23, 12:02
If it's acceptable, I am going to upload each copy of ega640.drv I have. (and nothing more) Okay?
Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-23, 10:14
Only two? How did you conclude that?
Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-23, 09:33
@llm: See attachment.
Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-23, 09:15
@ilm:
Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-22, 20:43
Look under the header "3C0-3CF EGA/VGA" at http://helppc.netcore2k.net/hardware/ports That may contain some useful info, and at the risk of attention seeking self-advertising, possibly my Github page (see signature) will contain a few useful things. Probably nothing that will help with your …
Re: How does Sierra's EGA640.DRV even work?
Posted on 2021-12-22, 09:03
I have tried reverse engineering binaries. This is very time consuming and tedious. My advice would be to observe the driver's behaviour using a debugger. Perhaps a memory dumper or something that takes a snapshot of the current color palette.
Re: vintage programming
Posted on 2021-12-16, 11:25
I used to do all my programming in QBasic under MS-DOS 5.0 and 6.22. Those two languages are pretty decent, especially if as with all languages a certain amount discipline and skill is applied. Although I have never tried it with QBasic I know from programming in Quick Basic 4.5 (which I got my …
Re: Anyone interested in helping me make a game? (A Sequel to Cosmo's Cosmic Adventure.)
Posted on 2021-12-16, 10:59
@T-Squared: First of all, sounds like an interesting project, I have tried that game years ago and vaguely remember it. :-) I have a lot of experience with QBasic and could answer a few questions if you like and even do some testing. I also have some knowledge concerning C. @vstrakh: Althouh you …
I wrote a 8086 emulator
Posted on 2021-11-20, 16:54
which can be downloaded here: https://github.com/PeterSwinkels/8086-Emulator So far it only emulates the CPU, there is no proper way for it to handle port I/O. It halts and expects the user to handle that. To be honest I have no idea how to correctly emulate most (some keyboard and video stuff I …
Re: Playing sound using the Sound Blaster and DMA->
Posted on 2021-11-17, 11:34
@Tiido: thank you!
Re: Playing sound using the Sound Blaster and DMA->
Posted on 2021-11-16, 18:42
@root42: Thank you for the links! I made some changes to my program: https://github.com/PeterSwinkels/Quick-Basic-sound-blaster/blob/main/PlayWav2.bas I now have only one question left: What is the MSB/LSB flip flop thing? Why do I need to write a null value to it? I know MSB/LSB means most/least …
Re: Playing sound using the Sound Blaster and DMA->
Posted on 2021-11-16, 14:03
@Bandi: thank you! Your links already answered my questions regarding the bit operations (bitwise OR should indeed have been used here) and I now know what I/O port &HA is used for. I may have more questions in the future.
Playing sound using the Sound Blaster and DMA->
Posted on 2021-11-16, 10:47
I found a pretty good article concerning playing sound using a Sound Blaster in Quick Basic here: http://www.phatcode.net/articles.php?id=208 and used it to create my own wave file player: https://github.com/PeterSwinkels/Quick-Basic-sound-blaster/blob/main/PlayWav2.bas I got everything to work fine …
Re: Using the microphone in DOSBox
Posted on 2021-10-30, 12:25
To answer my own questions: I have done some testing with Windows 3.11 and found that DOSBox and DOSBox-x both don't appear to support a microphone.
Re: pkunzip problems
Posted on 2021-10-30, 09:40
Why not just use Winzip or a similar program for Windows?
Using the microphone in DOSBox
Posted on 2021-10-29, 18:00
First of all, I did a quick search of the forum before posting . My apologies if I missed the relevant topic. My questions: 1. Does DOSBox support a microphone? As far I can tell it doesn't. 2. If DOSBox doesn't support a microphone, does anyone know of an alternative DOSBox build that does? (DOSBox …
Re: Dell 486 Bios Recovery
Posted on 2021-09-28, 17:36
Some motherboards have a small button somewhere which allows you to reset the CMOS...
Re: Extended character table fonts (pointed at by interrupt vector 1Fh)
Posted on 2021-09-25, 18:14
@ripsaw8080: D'oh! You're right of course, silly me. I fixed it so it now restores the original vector. And guess what? It works! Thank you!
Re: Extended character table fonts (pointed at by interrupt vector 1Fh)
Posted on 2021-09-25, 11:27
@ripsaw8080: I checked again. It works, that is the first time around. (try running it multiple times) After that the characters get corrupted. I have no idea why. Do you (or anyone else) has any idea why?
Re: Extended character table fonts (pointed at by interrupt vector 1Fh)
Posted on 2021-09-25, 09:25
@ripsaw8080: first of all, thank you for replying to my posts so far. I don't expect you to debug my program for me if you don't want to, however I was hoping someone (be it you or anyone else) would be willing to try to debug my code. I should have mentioned I had tried to debug my code but got …
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