The ACSI port is only 8bit, CPU & IDE is 16bit.PaulJ wrote: Fri Apr 12, 2019 5:21 pm US with RateHD 896 K/s you/icky proto IDE with IDC drive ~1420 K/s = ~60% improvement.
My thoughts also, The driver via DMA reads data from the drive into a memory buffer, possible issue here.. Does the driver read two bytes and write to memory once.. or does it read byte, write byte. Using DMA I would bet its read byte, write byte.. On the iDE one would hope its read word, write word. Guess one needs to understand the driver software to analyze the operation. It is encouraging to see a noticable speed improvement with the IDE interface.exxos wrote: Fri Apr 12, 2019 5:33 pmThe ACSI port is only 8bit, CPU & IDE is 16bit.PaulJ wrote: Fri Apr 12, 2019 5:21 pm US with RateHD 896 K/s you/icky proto IDE with IDC drive ~1420 K/s = ~60% improvement.
However the CPU takes more cycles to access RAM than DMA does. So if you ran 8bit on the CPU, it would be slower than the DMA port.
PhilC wrote: Fri Apr 12, 2019 6:11 pm The good news is everything I have connected so far works except the one CF, which I will send to exxos to try. As it works on the PC.
the computer won't even get as far as changing the monitor to 50hz with it connected.
wow, is it shorting out one of the signals to gnd or something ?!PhilC wrote: Fri Apr 12, 2019 7:46 pm the computer won't even get as far as changing the monitor to 50hz with it connected.
It must be something daft like that. I've used it on a USB to IDE adaptor and a USB to CF adaptor on my laptop and all is fine though.
Everything in Ickys house has a label apparently, now he seems to be expanding his territoryPhilC wrote: Sat Apr 13, 2019 1:01 pm And here's the IDE board, finally complete thanks to labelling from Icky
I wonder if he's labelled his wife and daughter yet?
