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Old 14th Oct 2018, 9:31 pm   #37
buggies
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Join Date: Jan 2009
Location: West Lothian, UK.
Posts: 357
Default Re: 486 PC. Keyboard problem.

Quote:
Originally Posted by Station X View Post
A couple of questions please George.

If special ISA Card drivers are needed I assume they won't be on the DOS start up diss, but will need to be loaded as part of the application software?

Should the echo command actually show characters RECEIVED from the RS232 port? If so I can see the possible need for RTS/CTS linking.
No specific drivers provided on the DOS disk(s). I think DOS should manage to work the ports if they are recognised in the BIOS.
No, the echo command will not show anything locally so would need either scope or pair of parallel back-to-back LEDs + resistor on the TX pin on the D connector.
Procomm is a DOS comms program which is only about 140k so the exe file can be added to a floppy. The freeware version procomm230.zip can be found by scrolling down on this page:-
http://www.aspectscripting.com/support.shtml
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