DOS ain't dead - Open Source DOS Sound standards!

Open Source DOS Sound standards! (Developers)

posted by bretjohn , Rio Rancho, NM, 01.01.2013, 19:21

> But many games runs in pmode - dos4gw and those couldn't be simply
> trapped...?

Unfortunately, the way EMM386 et al trap the I/O ports only works from real (actually, V86) mode. In order to allow I/O ports to be virtualized from "real" DOS (without the aid of hardware virtualization) from PMode, you must drop down to real/V86 mode to do the I/O. Modern compilers could be written to do this automatically, I'm sure.

Other options are to always use (or develop) a BIOS/DOS (software) level API and never access hardware directly, or for applications to learn how to access all hardware directly (USB, FireWire, BlueTooth, ...).

Over time, I see the hardware virtualization of peripheral devices (serial ports, sound cards, networks, etc.) in VM's in a DOS-compatible fashion completely disappearing, and the need for software-level emulation arising again. Applications that aren't written with this scenario in mind will become completely useless, IMO.

Post reply

Complete thread:

Open Source DOS Sound standards! - sparky4, 20.12.2012, 05:09 (Developers)
- Open Source DOS Sound standards! - DOS386, 20.12.2012, 05:42
  - Open Source DOS Sound standards! - sparky4, 20.12.2012, 05:51
    - Open Source DOS Sound standards! - DOS386, 20.12.2012, 05:54
    - Open Source DOS Sound standards! - Laaca, 20.12.2012, 07:46
      - Open Source DOS Sound standards! - sparky4, 20.12.2012, 17:40
        Open Source DOS Sound standards! - RayeR, 21.12.2012, 03:35
        Open Source DOS Sound standards! - sparky4, 21.12.2012, 03:45
        Open Source DOS Sound standards! - Cyril, 23.12.2012, 10:58
        Open Source DOS Sound standards! - RayeR, 23.12.2012, 18:31
        Open Source DOS Sound standards! - Laaca, 24.12.2012, 11:18
        Open Source DOS Sound standards! - RayeR, 24.12.2012, 14:57
        Open Source DOS Sound standards! - Laaca, 24.12.2012, 16:06
        Open Source DOS Sound standards! - sparky4, 24.12.2012, 09:18
        Open Source DOS Sound standards! - DOS386, 24.12.2012, 09:47
        Open Source DOS Sound standards! - DOS386, 24.12.2012, 09:49
        Open Source DOS Sound standards! - RayeR, 24.12.2012, 15:02
        Open Source DOS Sound standards! - sparky4, 28.12.2012, 22:45
        Open Source DOS Sound standards! - bretjohn, 31.12.2012, 00:23
        Open Source DOS Sound standards! - RayeR, 31.12.2012, 02:21
        Open Source DOS Sound standards! - bretjohn, 01.01.2013, 19:21
        Open Source DOS Sound standards! - RayeR, 02.01.2013, 23:40
        Open Source DOS Sound standards! - bretjohn, 03.01.2013, 20:00
        Open Source DOS Sound standards! - sparky4, 08.01.2013, 02:36
        Open Source DOS Sound standards! - RayeR, 08.01.2013, 04:02
        Open Source DOS Sound standards! - bretjohn, 09.01.2013, 01:41
        Open Source DOS Sound standards! yay! - sparky4, 09.01.2013, 21:55
        Open Source DOS Sound standards! yay! - bretjohn, 10.01.2013, 18:59
        Open Source DOS Sound standards! yay! - sparky4, 10.01.2013, 23:25
        Open Source DOS Sound standards! yay! - tom, 11.01.2013, 00:55
        Open Source DOS Sound standards! yay! - sparky4, 11.01.2013, 01:01
        Open Source DOS Sound standards! yay! - Arjay, 11.01.2013, 01:31
        Open Source DOS Sound standards! yay! - sparky4, 12.01.2013, 08:57
        Open Source DOS Sound standards! yay! - RayeR, 12.01.2013, 21:49
        Open Source DOS Sound standards WOW!!! - DOS386, 04.02.2013, 15:28
        Open Source DOS Sound standards WOW!!! - sparky4, 07.11.2013, 18:38
- Open Source DOS Sound standards! - sparky4, 29.12.2012, 21:27