Sounds great! I'm curious to check out your code. If you coulde, please post a patch or the modified code files. Thanks for your help!

You can e.g upload it to "patches" section on dosbox's sourceforge page (and be able to further mantain it there).

Ok, until i figure out how to make patches and upload things to Sourceforge I will attach it here.

Things tested with this code:
- Microsoft mouse driver (with microsoft mouse, of course 😀, using a disk image

- An old tool I checked computers for brown-out serial ports a century ago
(internal loopback test, external loopback plug)

- A Siemens Simatic S5 PLC with its old programming software (interrupt-driven mode)

All those worked fine at last.

Now about the code itself:

- FIFO not implemented yet
- The softmodem cant be used yet
(Is there an easy way to test the softmodem? Then I could try to make it work again)

It is now in the Sourceforge dosbox patches section. I Hope i did everything right.
I also added some more changes.

Nice work!

I've recopiled with your Feb-23 sources posted to the forum, and it worked for some software my Dad uses to communicate with his Radio Controlled receiver. Very cool stuff.

What is in the updates you posted on sourceforge? Worth getting?

Cheers,

Stu

The difference is that the newer code writes the com ports base address to the appropriate spaces in bios data area. If an application exists that directly reads those values it could be closer to work.

A Gates's dos booted inside dosbox now feels that there must be a comport around somewhere (mode reports a com1), but sending characters to it still doesn't work.

I don´t know anything about compiling so I can´t compile the patch myself.

Can someone give me a copy of the (re)compiled program?

I would be happy ...

Thanks Philipp

You can have my test build (no warranty for anything...)
Be aware that this is a CVS build. I don't know how well people here will respond to questions about it.

If the files msvcp71.dll and msvcr71.dll are not on your system already, you will have to download them and put them into the Dosbox folder (or somewhere else where Windows will find them). Ask Google for download locations.

Extract the attached zip file into an already installed Dosbox0.63 folder.

Hi h-a-l-9000,

thank´s very much for quick answer.

I found the *.dll´s in google and will try your program this weekend.

Thanks Philipp

Hi h-a-l-9000 again,

your programm works! Thank you very much

Hello Hal,

I have downloaded your code for the use of serial ports, however I am not very familiar with how to put them into use. If you would, could you please give me some pointer or just down right instructions on how to do this.
Any help is greatly appreciated. 😀
Thanks
Ravagin

Hello,

if you want to use your DOS application with serial port, you can download the compressed exe file I posted here.

If you want to edit the code, please tell me more specific where you need help.

Hmm Somebody heared/know if canadacow is going to do something with the code ? Else I might take a look at it to see wether it can be commited to the cvs.

No clue,

Haven't heard from or seen CC in a long time probably RL (tm)

Anyways, I recently was messing with the patch to make it patch into the recent CVS core. It's not cleaned up yet (what with all the commented out stuff from the earlier one) but I might as well post it to make it available.

Greets
~Paladiante~

CC said to check to make sure that your patches don't break TCP/IP over serial. He doesn't have time right now, still in the middle of a move!

Hi h-a-l-9000
I have tried your test build from dosbox_cvs_serport_win32.zip. It is running some dos plc programming software on XP using a USB-serial adaptor which I have not been able to get working any other way. Excellent!

Hal. Just wanted to thank you for the work you put into this Dosbox modification. It allowed us to use one of our older modem based payroll programs on Windows XP with modem!

We were beginning to think we would need to retain an older Windows 98 machine to keep this program going but now we can put it on the Windows XP box.

Thanks again!

Cheers!

Hi,

thanks for the feedback. So it looks like I finally produced something useful 😀
I have further worked on it:
- added support for multiple com ports, which required a modification of the config file ([COM1]-[COM4] style)
- added a serial dummy port (UART but nothing connected to it, for programs that like to have a serial port around)
- added the ability to detect line errors on the hardware
- killed a bug which caused RX overflow if both modem and directserial were enabled

You may also want to check out the modem, it worked pretty well with my testing.

Have fun communicating with your microwave oven 😁

Another update:

- diff for current cvs
- modem update