Strange computer problem loosing hardware lpt2 port
Being not really a newby this i can say is the stranged problem i ever have seen
I have in a company a POS (point of sale) installed working for about 2 years without major problems
The computer used is a HP verctra (DOS 6.22) with 3 hardware parallel ports used as LPT1 LPT2 LPT3
On LPT2 is a small printer installed and is looped to the pay-desk drawer
Around 2200 in the evening now allready 3 times on a saterday but sometimes also on other days this LPT2 stop to work
I go there (lpt2 doesnt do anything anymore) eg Echo hello > LPT2 but if i change everything to LPT1 (in the software not changing any cables) everything is working again and than the strange thing the next day the LPT2 port is working again
I changed allready the extension card for the LPT2 and 3 and changed the printer but this didnt solve the problem
So for my feeling there has to be something happening around 2200 but I have no idees anymore
Somebody want to give it a try
There is a virus on your computer that changes your current settings... You can install anti-virus sofware like spybot, adware and others...
0
randokerCommented:
Wow... Let me dust off my DOS hat and put it on.
Try this Parallel Port Detection and Test Utility to see if you can shed a little more light on the problem.
This is a very handy set of DOS utilities which you can use to check your standard parallel port addresses for parallel ports -- And to test how fast they are. It also can test them to verify if they appear to be working correctly.
It reports the I/O Address (3BCh, 378h, 278h), IRQ (5 or 7), and Port Type (Standard 4-bit, 8-bit bi-directional, EPP, or ECP). It also reports what DOS thinks the LPT port is set to. And with a simple paper clip loop-back connection, can test to see if the IRQs (interrupts) are working on your parallel ports.
There is also a very valuable and extensive document about parallel ports included (PARALLEL.DOC) which is an excellent tutorial on parallel ports.
q-2000 impossible this is a cash register without connection to the internet also no additional software installed, the system is running MS-DOS 6.22 (Spybot, adware etc 1 are not for virus but for Spyware and adware 2 are for windows )
Randoker I have a loopback adaptor where I connect this to the LPT ports runs a external test on the ports as i stated before
When the error occure LPT2 = LPT1
LPT2 is not working anymore doesnt give me any responce also doesnt show any IRQ information
So it seems that the LPT1 is dead and LPT2 is getting LPT1