Hi Nick, > The speed limitation in this case seems to be reading from the I/O area on a > PC. This is because the bus slows down (for ISA at least). The best I've > ever come across is approx 1MHz read rate from the I/O area on a PIII-600 > using 8bit accesses. I expect the limiting case is not much faster than > this. Ah, I forgot: I used 16 bit accesses for this purposes, because I needed more than 8 inputs. Anyhow, if I remember right, 16 bit access are FASTER than 8 bit access (at least, with all BIOSes I remember, the the wait states for 8 bit access where more than for 16 bit accesses. I think that was because 8 bit access must be compatible with even older hardware (from pre-AT ages). Spiro. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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