TIG IF BOARD (EPSON)

20MB, 40MB external SASI hard disk, "HDD-20R", "HDD-40R" attached C bus I / F.

・ 8 stations dip switch SW1: I / O address setting
ON-ON-ON-ON-ON-OFF-ON-ON = XX80H, XX82H (When used as the first HDD)
OFF-OFF-OFF-ON-OFF-OFF-OFF-OFF = XXDCH, XXDEH (When used as a second HDD)

・ 8 stations dip switch SW2: Setting of connected HDD
The setting of SW2 is necessary only at the I / F of the first HDD (in the I / F of the second HDD, any setting may be used).

ON-ON-OFF-ON-ON-OFF-OFF-OFF = 20 MB HDD connected
ON-ON-OFF-OFF-ON-OFF-OFF-OFF = 40 MB HDD connected
Connect two HDDs of ON-ON-OFF-ON-ON-OFF-ON-ON = 20 MB
ON-ON-OFF-ON-ON-OFF-OFF-ON = 20MB on 1st unit, 40MB HDD on 2nd unit
ON-ON-OFF-OFF-ON-OFF-ON-ON = 40MB on 1st unit, 20MB HDD on 2nd unit
Connect two HDDs of ON-ON-OFF-OFF-ON-OFF-OFF-ON = 40 MB

・ 5 stations jumper switch J1: Change prohibited
Always 1,3 short, 2,4,5 open.

・ 4 series jumper switch J2: Selection of body model, selection of first HDD / second HDD
Below, in the order of the main unit model ■ first setting ■ second setting

PC-9801, PC-98 XA ■ 2, 4 short, 1, 3 open ■ None
PC-9801M2 ■ 1, 3 short, 2, 4 open ■ 2, 4 short, 1, 3 open
Other models ■ 1, 4 short, 2, 3 open ■ 2, 4 short, 1, 3 open

・ Three jumper switch J3: Do not change
Always short between 1-2