Re: More accuration time in DOSBOX

Posted on 2012-02-16, 23:11

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by jcdutton

in DOSBox Development

in DOSBox Development

"Where do you see dos ints modifying the timer?" I could be wrong here, as it was a long time ago that I looked at it. As I understand it, there is a timer routine, and each time it is called, it increases the "tick" counter. I think on real hardware, this timer routine is triggered from the …

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Re: More accuration time in DOSBOX

Posted on 2012-02-16, 22:55

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by jcdutton

in DOSBox Development

in DOSBox Development

"Because otherwise a lot of things don't match, simplest example is that pause creates inconsistencies (large-scale example). " Do you mean "pause" as in to pause the dosbox VM so that you can go off an do something and come back later and continue where you left off? So, although this sort of " …

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Re: More accuration time in DOSBOX

Posted on 2012-02-16, 21:36

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by jcdutton

in DOSBox Development

in DOSBox Development

"This decouples the regular timing from that dos call". Why does "INT 21,2C - Get Time" have to attempt to be coupled with regular dos timing. I was thinking that the Get/Set Time calls in the original MS-DOS would just read/write the RTC, and not adjust the interrupt timer ticks. Which other …

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More accuration time in DOSBOX

Posted on 2012-02-15, 13:45

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by jcdutton

in DOSBox Development

in DOSBox Development

Hi, Currently dosbox uses ticks for time. This patch changes the behavior to instead use gettimeofday for the DOS time calls. I would like to include this patch in upstream DOSBOX with maybe a config file option to choose which time method to use. I have an old DOS app that needs accurate time, and …

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Re: dosbox text mode only over ssh

Posted on 2008-07-21, 18:41

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by jcdutton

in DOSBox General

in DOSBox General

I want this because I have a DOS program that only used text mode. I am currently running it remotely over an X session, but it uses a lot of bandwidth on the network. dosemu is not able to run this application for some unknown reason. If dosbox could instead only send the text chars from the text …

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dosbox text mode only over ssh

Posted on 2008-07-20, 18:39

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by jcdutton

in DOSBox General

in DOSBox General

Hi, Is it possible to use dosbox over ssh, but without a X display? I.e. Only permit text modes in dosbox, and therefore dosbox would only have to send ascii code updates to the screen, instead of bitmaps when the screen gets updated. Something like a ncurses output for dosbox, instead of vga would …

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Re: Problems with CAPS LOCK on 64-bit platforms. 32-bit platforms are fine.

Posted on 2008-05-23, 23:19

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by jcdutton

in DOSBox General

in DOSBox General

CAN_USE_LOCK 1 makes is work. Just a minor bug, if dosbox is entered with the CAPS LOCK ON, the first press of CAPS LOCK in dosbox does not call the IRQ1 routine. If CAPS LOCK is OFF when dosbox in entered, the first press of CAPS LOCK works fine.

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Re: Problems with CAPS LOCK on 64-bit platforms. 32-bit platforms are fine.

Posted on 2008-05-23, 22:29

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by jcdutton

in DOSBox General

in DOSBox General

Ok, I have done some more investigations. Is seems that the binary dosbox that comes with ubuntu is fine, but if I try to compile my own dosbox, I have problems. Is there any way to find out which compile options were used when ubuntu compiled dosbox?

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Re: Problems with CAPS LOCK on 64-bit platforms. 32-bit platforms are fine.

Posted on 2008-05-23, 21:19

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by jcdutton

in DOSBox General

in DOSBox General

os? Linux, Ubuntu Edgy, Feisty, Hardy. Gentoo

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Problems with CAPS LOCK on 64-bit platforms. 32-bit platforms are fine.

Posted on 2008-05-23, 19:52

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by jcdutton

in DOSBox General

in DOSBox General

Hi, I have problems with CAPS LOCK in DOSBOX 0.72. On 32-bit platforms it works fine. I.e. You press CAPS LOCK and it locks. On 64-bit platforms it does not work correctly. I.e. You press CAPS LOCK and it does not lock, but works like a SHIFT key. I have even installed a chroot 32-bit userspace on a …

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Re: CAPS LOCK does not work.

Posted on 2007-12-15, 12:52

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by jcdutton

in DOSBox General

in DOSBox General

Thank you! Fixed with: export SDL_DISABLE_LOCK_KEYS=1 In fact works with any non blank value so "1" could have been "Yes" or whatever.

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Re: CAPS LOCK does not work.

Posted on 2007-12-15, 12:34

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by jcdutton

in DOSBox General

in DOSBox General

Ah! Nice catch. Problem is with Ubuntu machines. Gentoo does not have the problem. So, what now?

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Re: CAPS LOCK does not work.

Posted on 2007-12-15, 12:24

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by jcdutton

in DOSBox General

in DOSBox General

Here is how to reproduce my problem. At the dosbox dos prompt. Type some char, press and release "caps lock", type some more characters. The strange thing is that the caps lock light comes up on the keyboard, but no caps is active inside dosbox. It is even more bizare. If I place Caps lock on before …

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CAPS LOCK does not work.

Posted on 2007-12-15, 12:06

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by jcdutton

in DOSBox General

in DOSBox General

Hi, Why does the CAPS LOCK not work in DOSBOX? In DOSBOX version 0.71, the CAPS LOCK acts the same as the SHIFT key. Has this bug been fixed in later versions of DOSBOX? James

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Re: Tming patches

Posted on 2007-11-16, 17:20

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by jcdutton

in DOSBox Patches

in DOSBox Patches

Why not just use gettimeofday() instead of INT8 ticks? ticks seem to no stay accurately in time over the whole day.

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Re: DOSBOX serial port behaviour

Posted on 2007-10-24, 19:25

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by jcdutton

in DOSBox Development

in DOSBox Development

I turned on the dosbox SERIAL_DEBUG. My app is specifically not using the serial chip's FIFO, and on RX, it is reading the RX data register twice in a row inside the IRQ routine. So, I know that dosemu only has a FIFO mode, and not non-fifo mode, so that is my probem with dosemu. I will have to …

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Re: DOSBOX serial port behaviour

Posted on 2007-10-23, 13:53

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by jcdutton

in DOSBox Development

in DOSBox Development

And if the problem is with the RX and not the TX? Can DOSBOX emulate both FIFO on and FIFO off modes of the serial chips?

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Re: DOSBOX serial port behaviour

Posted on 2007-10-23, 13:29

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by jcdutton

in DOSBox Development

in DOSBox Development

I would like to implement better serial port features into DOSEMU. DOSBOX seems to do well, but DOSEMU should be able to perform as well with serial ports. Are there any notes regarding how DOSBOX needed to behave in order to work better with old DOS apps. The only reason I would like this, is due …

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DOS serial port timing test programs

Posted on 2007-10-23, 10:42

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by jcdutton

in DOSBox Development

in DOSBox Development

Hi, Does anyone know of any DOS based timing programs that can time the receipt and transmission over the serial port. I need to do tests so that the serial data leaves and arrives in DOSBOX and DOSEMU at exactly the same time as it would on real hardware. This is due to some very old DOS …

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DOSBOX serial port behaviour

Posted on 2007-10-23, 10:34

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by jcdutton

in DOSBox Development

in DOSBox Development

Hi, I have been running both DOSBOX and DOSEMU with an old DOS application. The application works in DOSBOX, but not in DOSEMU. What have the DOSBOX developers done to make serial coms work better in DOSBOX?

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