HP-41 - port not working
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08-13-2016, 12:01 PM
Post: #4
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RE: HP-41 - port not working
Thank you for your suggestions.
It's a CV so no 82106A or 82170A memory possible. Checked with X-Func in port 3 and X-Mem in port 4. EMDIR does report 124 with X-Mem in port 4, 362 in port 2. Next I did a reset, Memory lost. After each try decribed below I did a reset to Memory lost so I have the basic configuration before next test. Then plugged in X-Func in port 4 (calculator off). Then ON. Sometimes the calc immediately freezes, does not respond to any key. With sometimes weird display 0.0000 00 00 Sometimes after a single key press it shows Memory lost and then is frozen. If I then remove the X-Func module it works perfect. But switching to program mode it sometimes shows 00 REG 273 or 03 or 05 or even PRIVATE. So I think the calculator recognizes the module plugged in (and is confused) but has some irregularities concerning the timing or phi line? BTW: I have no oszi, only multimeter. What I measured some time ago was the I/O block. I have connections (0 ohms, as shown in the service manual) from port 1 Vcc to port 3 Vcc and B4, B3 to B3. Port 2 Vcc to port 4 Vcc, port 2 Vcc to B3, port 4 Vcc to B3 and B4. Andi |
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Messages In This Thread |
HP-41 - port not working - AndiGer - 07-29-2016, 05:11 PM
RE: HP-41 - port not working - wojtek - 08-03-2016, 02:32 PM
RE: HP-41 - port not working - Diego Diaz - 08-04-2016, 01:03 AM
RE: HP-41 - port not working - AndiGer - 08-13-2016 12:01 PM
RE: HP-41 - port not working - Diego Diaz - 08-19-2016, 04:20 AM
RE: HP-41 - port not working - AndiGer - 08-28-2016, 12:11 PM
RE: HP-41 - port not working - AndiGer - 09-05-2016, 08:44 AM
RE: HP-41 - port not working - aurelio - 10-09-2016, 06:48 AM
RE: HP-41 - port not working - AndiGer - 10-09-2016, 08:54 AM
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