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Flakey HP 70: post modified as RAM Chip identified.
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Flakey HP 70: post modified as RAM Chip identified.
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Flakey HP 70: post modified as RAM Chip identified.
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10-21-2015, 08:55 PM
(This post was last modified: 10-22-2015 07:02 AM by Geoff Quickfall.)
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Flakey HP 70: post modified as RAM Chip identified.
Just received an HP 70 with a bad RAM chip.
The calculator basic functions ( - + x / ) which rely on the stack work. The higher functions ( n i PMT PV FV ) and the memories K and M do retain their inputs. The K register does not auto load with a 12 and anything input in the K manually or the M registers are not stored. Seems to me that the RAM chip runs the stack and runs the financial functions and memories. Is this correct? If so, then replacing that chip should resurrect this machine. Cheers, geoff |
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| Messages In This Thread |
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Flakey HP 70: post modified as RAM Chip identified. - Geoff Quickfall - 10-21-2015 08:55 PM
RE: Flakey HP 70 - Geoff Quickfall - 10-22-2015, 06:22 AM
RE: Flakey HP 70 - Didier Lachieze - 10-22-2015, 06:42 AM
RE: Flakey HP 70: post modified as RAM Chip identified. - Geoff Quickfall - 10-22-2015, 06:52 AM
RE: Flakey HP 70: post modified as RAM Chip identified. - Harald - 10-22-2015, 07:18 AM
RE: Flakey HP 70: post modified as RAM Chip identified. - Geoff Quickfall - 10-22-2015, 03:43 PM
Damn it!!! - Geoff Quickfall - 11-08-2015, 01:48 AM
RE: Flakey HP 70: post modified as RAM Chip identified. - Harald - 11-09-2015, 03:20 PM
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