Posted on 1997-01-28
I am attempting to access a card on the ISA bus using Borland C++ 3.1's outpw() and outport() commands, but in both cases the I/O write line goes low (active low) twice while the address is still valid causing the wrong values to be latched because the data is no longer valid on the second strobe. However, that only happens when I attempt to do 16 bit transfers, eight bit transfers work like a charm. Am I doing something wrong or is this simply how the two byte transfer works and I simply have to design around it. Please reply by email.