XT to IDE hard drive controller development update

J1mbo designed some digital logic upgrades to the XT to IDE hard drive controller. This board enables you to use IDE hard drives with vintage XT computers. His design increases the write speeds to the hard drive.

As promised here’s my schematic that should provide for fast writes with the DPv2 board. The command trigger is changed for port xx0h writes to xx1h, hence allowing the CPU to write low then high bytes, hence opening up the OUTSW instruction on the V20. Otherwise it should work like the chuck-mod schematic.

So now I just need to learn how to use ISE :)

Via the forum.