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COM Ports not working!! Old computer is PISSING ME OFF!! If you solve you get a free...

S

shawnmos

Banned
Ok I am taking all my old parts and building as many old internet ready computers as I can. Well the one I am building has a 486 motherboard with an Evergreen 133 upgrade overclocked to 150MHz, 4GB HD, 40x cd-rom, 56k modem, cheap SVGA video card, and a piece of crap I/O controler(s). I have 4 I/O controlers and only one I am able to get the com ports to work. But guess what, the one that works with the com ports, the IDE controler doesn't work. The other 3 Windows says there is no mouse. So I got a copy of microroft's MOUSE.COM and it would say Driver not installed - Mouse not found. I have tried using com2, disabling com1, then com2, no luck. I got a hold of more info about one of the I/O controlers off some web site and I checked everything and all of the settings are identical to the one that works. The only way I was able to even find out the com ports worked on that one defective one was to boot off a floppy and run MOUSE.COM. It installed the drivers fine. What the hell? I doubt all of these controlers are defective. The 3 controlers with the com ports I can't get to work everything else seems to work. I press Print Scrn in dos and it did print. The only thing I can think of is it is because of the overclocking. I would lower the speed but the jumpers are not labled and I have no way to change the bus speed(50MHz). Please help!!

If you solve it I will give you a free...


















lollypop. 😀 😉 😛
 
Do you have memory address problems by any chance. IF you have two com port son the same addres this might be a problem. (actually i think they are adress ranges 🙂


OH and i hate lolipops. 🙂
 
Lets see... Com1 address is 3F8 and Con2 address is 2F8. This is the same setting for all of them. Also Com1 is using IRQ4 and Com2 is using IRQ3. Should I change the IRQ or address?
 
Are you using the same cables from the controller cards to the actual connector ?? In the 486 days, these cables were not pinned in a standard manner, you need the specific cables for the card, or you need to know the pin outs and flip them around.
 
Evergreen drivers?? All of the controlers have com 1 on board. Only com 2 has a connector. Also I tired changing the IRQs and the addresses and it didn't do anything.
 
Are you sure that you are not overclocking the ISA bus with the Evergreen at 150 ??. Most 486 mobos that I used, and I built 100s of 486 systems, had built in comm ports.
 
How would I know if the ISA bus is overclocked? Built in com ports?? Really? The only ones I have seen built in com ports is pre-built computers like Compaq or Packard Bell.
 
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