I'm quite bad at asm and I would like to know how to enable the IDE drives by using the $FF8800 and $FF8802 registers. I own the hardware registers listings and a documentation on paper, but writing something into the register 14 of the PSG is a bit weird for me.
It seems I have to write the register number into $FF8800, but how do I put the bit 7 (IDE control) on, please?
I need to enable the IDE drive because a bug in a demo desables it (I'm not the author of this demo).