IDE interface scheme
Note: Instead 74LS03 you may use any OC
inverter. Instead 74HCT245 -74LS245 will be OK.
Interface will work even without this two bus driver. This is recommended only in case when
2.5 inch drive is used in Atari's case, with short cable.
Lines CE1 & CE2 are for optional TOS 2.06 ROM chips, in ST machines. This is for solution with 4 pieces of 27512 EPROMs.
Of course all capacitors are ceramic, and must be soldered shortest possible.