HP97 The journey begins

[teenix]

(11-30-2019 12:12 PM)Harald Wrote:  Hi Tony,

Can you make that program available as a memory card download?
From what I understand it should be possible to do this on an original 67 as well, but how would one go about that without the two new key codes?
Would it be possible to generate the messages with your emulator and then write them to a magnetic card and transfer to an original 67?

Probably all silly questions, but I haven't looked into this yet...

Cheers,
Harald

Hi Harald,

The new merged key codes are written to or read from the card just as any other data would be.

This is an example of a subroutine that will display the message stored in index position 00. The message will display, while a PAUSE is executed, then the program continues.

f LBL A
0
[h] [B] // merged key code for a Pause Msg
RTN

if "HELLO" is message #00, then "HELLO" will be displayed during the PAUSE.

These codes tell the new CPU to jump to a subroutine that processes the messages. This does not exist in the original CPU and I expect the new codes execute similar to a NOP. I will test that in next day or so, but that's what happens in the emulator when these codes are disabled.

In the original CPU, pressing [h] [A] for example, does an f GSB A and the PRGM mode display will show 31 22 11. The new CPU will show 31 11.

You have to bear in mind however, the stack is raised in the original and new CPU's when the message index is entered as it ends up in the X register.

cheers

Tony