Classic, Woodstock and Spice Emulators

[Dieter]

(06-19-2016 09:31 AM)PANAMATIK Wrote:  I didn't know that reading a card with register data does automatically set Flag 3.
Now I'm not sure whether to add this behaviour and set Flag 3 automatically if the file contains a DATA section.

Reading a data card sets flag 3. But on real hardware program cards and data cards are two different things. Unlike files for the emulator where both are combined.

That's why you should not set flag 3 when a data section is read. The mode section initializes the four flags. What is the emulator supposed to do if MODE tells it to clear flag 3 and DATA tells to set it? And a data section is always there if an emulator file is written by the program.

If the user wants to have flag 3 set in an emulator file with data section he can simply set this in the mode section.

(06-19-2016 09:31 AM)PANAMATIK Wrote:  It is possible to get close to a perfect emulation, but not closer.

On a real HP67 reading a data card first would set flag 3, reading the program card afterwards may clear it again. Or the other way round if the program card is read first. #-)

Dieter