Names Of Parts; Hardware Configuration - Epson TF-20 Reference Manual

2.2 Names of Parts

2.3 Hardware Configuration

Up to two TF-20 floppy disk units, each housing two drives, can be
connected together in a daisy chain with the HX-20. In Disk BASIC, the
designation of the drives of the first unit are drives A and B and those in the
second unit, drives C and D. The drive names are determined by the
setting of the DIP switches located inside the housing of the TF-20. The
factory setting is for drives A and B and the user must reset the DIP
switches himself when he adds a second unit. The procedure for adding a
second TF-20 is as follows.
(1) Loosen the four screws located on the lower edge of the cover of the
second TF-20. Change the setting of DIP switch 4 to OFF. DIP switch 4
is located on the rear, lefthand side of the PC board (in front of the 5-pin
interface connector). The location of DIP switch 4 is shown in the Fig.
2.3.
2-2
Turn DIP switch 4 OFF
Fig. 2.3 Right-side View of TF-20
When DIP switch 4 has been set to the OFF position, the disk drive can
be used as the second drive. The device names will be "C:" and "D:".
(2) Connect the DIN 5-pin end of cable #707 to the 5-pin connector of the
first TF-20.
(3) Connect the DIN 6-pin end of cable #707 to the 6-pin connector of the
second TF-20. "Daisy chaining", as this connection is called, of the
HX-20 to two TF-20 drives is shown in the figure below.
Fig. 2.4 Daisy Chaining the HX-20 to Two TF-20 Units
TF-20 5-pin DIN