Re: dosemu print serial problem

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On 07/10/16 09:44, Winfried Münch wrote:

> Hi,
> 
> I try to run a DOS program whith lpt Lizens Dongle and 3 Printers on
> dosemu 1.4.0.8 on Debian.
> 
> Most works great since I changed from Ubuntu 16.05 to Debian 8. Perhaps
> the older Linux Kernel.
> 
> All Printer are managed by cups and lpr -l -P printername works on Linux.
> 
> Problem is When I use direct port access to lpt1 the Dongle works great
> but I can't print to a lpr printer. I work 2 Days for LPT4 Working , patch
> the dosemu sources, but the drdos i found don't support lpt4. So no lpt4
> on dosemu.
> 
> One of the Printers is on COM1. So I tryed to print direkt on this Printer
> but I get somthing like this on debug:
> SER1: INT14 0x3: Port Status, AH=0x0 AL=0xb0
> SER1: INT14 0x1: Write char 0x6f
> SER1: Transmit 0x6f
> SER1: ERROR: TX overrun
> SER1: Read LSR = 0x0
> SER1: Read MSR = 0xb0
> SER1: Read LSR = 0x0
> SER1: Read MSR = 0xb0
> SER1: INT14 0x3: Port Status, AH=0x0 AL=0xb0
> SER1: INT14 0x1: Write char 0x6d
> SER1: Transmit 0x6d
> SER1: ERROR: TX overrun
> SER1: Func transmit_engine requesting TX_INTR
> SER1: Interrupt 11 (2) cannot be requested: enable=0 IER=0x0
> SER1: Interrupt 11 (2) cannot be requested: enable=0 IER=0x0
> SER1: Read LSR = 0x60
> SER1: Read MSR = 0xb0
> SER1: Read LSR = 0x60
> SER1: Read MSR = 0xb0
> SER1: INT14 0x3: Port Status, AH=0x60 AL=0xb0
> SER1: INT14 0x1: Write char 0x20
> SER1: Transmit 0x20
> SER1: Func transmit_engine requesting TX_INTR
> 
> So I try different Things, use com2="/dev/ttyS1", also direct portaccess
> with fast dosen't work.
> 
> So at last try with the speed and hogthreshold. No difference.
> 
> I won't try to work witch MSCLIENT and Network on DOS.
> 
> So is there a possibility to fix the serial problem.
> 
> Best regards
> 
> Winfried
> 
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I cannot respond to your query in any technical sense but I can tell you
from my own experience that on upgrading from Debian 7 (Dosemu 1.4.0.1)
to Debian 8 (Dosemu 1.4.0.7) the serial port stopped working. I solved
the problem in a pragmatic way by reverting to the earlier version of
Dosemu.

Damien Moore





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