Epson Equity 386/20 Product Support Bulletin page 38

HDD Controller ACB-2320 (16-bit)
FACTORY SETTINGS
Jumper Position
J5 No jumpers
J6
No jumpers
J7 No jumper
J8 No jumpers
J9, J10, J11
No jumpers
J12 1 to 2
J13 No jumper
Description
Used for hardware port addressing.
Manufacturing test points (DO NOT JUMPER).
Serial monitor output (DO NOT JUMPER).
Manufacturing test points (DO NOT JUMPER).
Not used.
Selects IRQ 14.
ACB-BIOS disabled (no ROM present in location U25).
Connection of LED indicator cable :
Model
Equity 386/20
Pin 1 of J4
Red wire