Toshiba T200 User Manual page 74

Subtest 03 Point to point (Send)
NOTE: To execute this subtest, two machines must be connected by a parallel
cable to the RS-232C ports. One machine should be set as "send"(subtest
03) and the other as "receive" (subtest 04). The wiring diagram for the RS-
232C direct cable is shown in Appendix F.
This subtest sends 20h through 7Eh data to the receive side, then receives the
sent data and compares it to the original data.
Subtest 04 Point to point (Receive)
This subtest is used with subtest 03. This subtest receives data from the send
side, then sends the received data.
Subtest 05 Interrupt Test
This subtest checks the Interrupt Request Level of IRQ 4, 3 and 5 from the
send side.
3-24
T200, T200CS