HP Pioneers ROM Dumping - Need help

[Dave Frederickson]

(07-01-2019 12:19 PM)RPLman Wrote:  Anyhow still like to learn how to enter in this Assembly code and make my own rom, I'll keep trying for now. Help will be appreciated.

It sounds like you're having difficulty entering the dump program. Enable the memory scanner and change the address to 52000. The 42 displays:
52000:0000000000000000

Enter the first instruction, D2.

The 42 displays:
52002:0000000000000000

So the D is stored at 52000 and the 2 at 52001. The next digit will be stored at 52002 which matches the program listing taking into account the address offset.

Enter the second instruction 135.

The 42 displays:
52005:0000000000000000

When the next instruction D1 is entered it will be stored starting at address 52005.

Navigate back to the beginning of the program at 52000. The 42 displays:
52000:D213500000000000

There are the first two instruction D2 and 135 in sequence. Change the address back to 52005 and continue to enter the rest of the program, making the necessary changes for calculator model and ROM version.

Does that help?

Dave