HP 41C Video interface test. Howto?

[Sylvain Cote]

I finally have some free time to write this small test plan.

Test #1: closed empty loop

Code:

Setup: HP-41C, HP-IL module printer activated, loopback mode
Loop : 41C <IL-cables> 41C
ON
FS? 55   // LCD: NO
FS? 21   // LCD: NO
PWRUP    // LCD: nothing expected, will show "TRANSMIT ERR" if loop is broken
OFF

Test #2: loop with video interface without power

Code:

Setup: HP-41C, HP-IL module printer activated, 82163 off , no monitor attached
Loop : 41C <IL-cables> 82163 <IL-cables> 41C
ON
FS? 55   // LCD: NO
FS? 21   // LCD: NO
PWRUP    // LCD: "TRANSMIT ERR" loop is broken, expected, video interface is not powered
OFF

Test #3: loop with video interface with power

Code:

Setup: HP-41C, HP-IL module printer activated, 82163 on , no monitor attached
Loop : 41C <IL-cables> 82163 <IL-cables> 41C
ON
FS? 55   // LCD: YES
FS? 21   // LCD: YES
PWRUP    // LCD: nothing expected, will show "TRANSMIT ERR" if loop is broken
OFF

Test #4: send text to interface

Code:

Setup: HP-41C, HP-IL module printer activated, 82163 on , no monitor attached
Loop : 41C <IL-cables> 82163 <IL-cables> 41C
ON
FS? 55   // LCD: YES
FS? 21   // LCD: YES
PWRUP    // LCD: nothing expected, will show "TRANSMIT ERR" if loop is broken
"TEST"   // test string
PRA      // LCD: nothing expected, send ALPHA to printer/video
OFF

At this point, if no error has shown up, the HP-IL side is working.

Part #2, later today, I have a HPCC meeting in 30 minutes.

Sylvain