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Oliver Schmidt 39f83b7709 Allow Telnet65 to send ASCII code 0 - on the Apple II.

Chris made me aware that ASCII code 0 actually is a valid character (usually entered as Ctrl-Space or Ctrl-@) and that it is actually used (i.e. by EMACS).

The Apple II allows to natively enter the ASCII code 0 via Ctrl-@. However so far get_key_if_available returned 0 in accumulator to signal that no key was pressed. In order to allow the Apple II get_key_if_available to return the ASCII code 0 in the accumulator I changed it to use the carry flag to signal that no key was pressed.

Because get_key_if_available needs of course to behave the same on all targets I changed the other implementations to use the carry flag too.

Unfortunately I don't know enough about input capabilities of the C64 to decide on how to best get Telnet65 to send ASCII code 0 there.

2017-08-09 21:27:28 +02:00

apps

Allow Telnet65 to send ASCII code 0 - on the Apple II.

2017-08-09 21:27:28 +02:00

drivers

Allow Telnet65 to send ASCII code 0 - on the Apple II.

2017-08-09 21:27:28 +02:00

inc

Generalized Apple II slot setting.

2017-06-04 00:10:36 +02:00

ip65

Added Telnet65 app.