Toshiba Tecra A2-S239 Maintenance Manual - Page 136

3 Tests and Diagnostics 3.11 Async Test Subtest 02 Point to point (Send) NOTE: To execute this subtest, two machines must be connected with an RS-232C direct cable. One machine should be set as "send"(subtest 02) and the other set as "receive" (subtest 03). The wiring diagram for the RS-232C direct cable is described 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 03 Point to point (Receive) This subtest is used with subtest 02 described above. This subtest receives the data from the send side, then sends the received data. Subtest 04 Interrupt test This subtest checks the Interrupt Request Level of IRQ 4, 3 and 5 in this order from the send side. The IRQ level 4, 3 and 5 is determined automatically only when the wraparound connector is connected. Subtest 06 FIR/SIR Point to point (Send) NOTE: To execute subtests 06 and 07, each computer must have access to the other computer's infrared port. This subtest sends 20h through 7Eh data to the receive side, then receives the sent data and compares it to the original data through the FIR/SIR port. Subtest 07 FIR/SIR Point to point (Receive) This subtest is used with subtest 06 described above. This subtest receives the data from the send side, then sends the received data through the FIR/SIR port. 3-28 Satellite A50/TECRA A2 Maintenance Manual (960-478)