TI59 Diagnostic forensics
07-26-2020, 06:47 PM (This post was last modified: 07-26-2020 07:14 PM by Pjwum.)
Post: #1
 Pjwum Member Posts: 58 Joined: Jan 2018
TI59 Diagnostic forensics
In a recent Thread member twoweims asked for a source for TI59 magnetic cards. During the discussion he mentioned a Diagnostic routine which is included in the US marketed version but not in Europe. Twoweims was so kind to send me a copy of the Diagnostic card.

Basically it calculates the error of some seemingly arbitrary functions:

error = pol(rec(5 < 30)) - \sqrt{896 + 4} + \frac{\pi^2-fp(\pi^2)}{3^2}-1

then checks if this error is within a certain limit:

error \cdot 10^{10} < 1 ?

The TI59 calculates 0.7 and signals an ok.

I was curious how other calcs of the same vintage would respond to this task. A 41CV and a 33C both showed an error of zero. But also both have less internal precision (10 digits) than the TI (12 digits). But the same calculation with a 48G and a 42s (12 digits) also resulted in an exact zero. Good job, HP.

The other facets of the Diagnostic card are:
- reading the card tests I/O-chip, amplifier-chip, magnetic head coils and mechanics
- maximizing the programme by inserting lots of zero-steps and adressing the lowest and highest storage register tests the RAM-chip

Patrick
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 Messages In This Thread TI59 Diagnostic forensics - Pjwum - 07-26-2020 06:47 PM RE: TI59 Diagnostic forensics - johanw - 07-27-2020, 01:15 AM RE: TI59 Diagnostic forensics - rprosperi - 07-27-2020, 02:20 AM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-27-2020, 02:42 AM RE: TI59 Diagnostic forensics - Maximilian Hohmann - 07-27-2020, 11:18 AM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-27-2020, 02:13 PM RE: TI59 Diagnostic forensics - pinkman - 07-27-2020, 09:35 PM RE: TI59 Diagnostic forensics - Pjwum - 07-27-2020, 03:51 PM RE: TI59 Diagnostic forensics - rprosperi - 07-27-2020, 09:51 PM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-28-2020, 04:47 PM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 06:55 PM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-28-2020, 08:35 PM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-28-2020, 09:52 PM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 10:05 PM RE: TI59 Diagnostic forensics - Pjwum - 07-28-2020, 05:17 PM RE: TI59 Diagnostic forensics - Pjwum - 07-28-2020, 05:43 PM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 07:01 PM RE: TI59 Diagnostic forensics - Pjwum - 07-28-2020, 08:49 PM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 09:57 PM RE: TI59 Diagnostic forensics - Paul Berger (Canada) - 07-27-2020, 09:53 PM RE: TI59 Diagnostic forensics - Pjwum - 07-27-2020, 03:57 PM RE: TI59 Diagnostic forensics - Werner - 07-28-2020, 10:09 AM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 12:51 PM RE: TI59 Diagnostic forensics - johanw - 07-29-2020, 07:46 PM RE: TI59 Diagnostic forensics - Pjwum - 07-29-2020, 08:49 PM RE: TI59 Diagnostic forensics - Werner - 07-30-2020, 02:11 PM RE: TI59 Diagnostic forensics - Werner - 07-28-2020, 01:13 PM RE: TI59 Diagnostic forensics - rprosperi - 07-28-2020, 04:31 PM

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