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[go67/97 for Android] Creating .pck files in a text editor?
08-12-2015, 12:57 PM
Post: #25
RE: [go67/97 for Android] Creating .pck files in a text editor?
(08-09-2015 08:43 AM)PANAMATIK Wrote:  According to the HP-67 manual the information in the header contains:
Quote:Besides the actual program memory step numbers and instructions,
the HP-67 also records the following information on a program card
on both the first pass and the second pass through the card reader:
1. The fact that a program (not data) is being recorded.
2. The fact that this is side 1 (or side 2).
3. Whether or not two passes are required.
4. Current status of flags FO, Fl, F2, and F3 within the calculator.
5. Current status of trigonometric mode (i.e., DEG, RAD, or
GRD) within the calculator.
6. Current display format of the calculator.
7. A checksum (a code to verify that the program is complete
when it is reloaded).

It should be possible to find the structure of the header by generating pck files with different settings.

I don't have the Go67 emulator, so I cannot test it.

Following the 7 digit header in line 0, 112 program steps are coded in lines 1-32
Every two lines represents a 7 byte register for 7 program steps. The 7 program steps are coded in reverse order in the two lines. The first program step is coded the last two digits in the second line.

For comparing the codes you can download the HP-67 table of program step codes



I wanted to say think you for the information you provided above.
It was a lot of help in helping me to decipher the layout and being able to create the crude program that I did to printout the program listings from the PCK file.

I think I now have the Header figured out. But not sure if any additional information is being stored in it or not. But for my purposes, I think I have enough.


Smithville, NJ
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RE: [go67/97 for Android] Creating .pck files in a text editor? - Bill (Smithville NJ) - 08-12-2015 12:57 PM

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