Re: Can Ctrl-C interrupt be removed from ProDOS BASIC?

[vandry@CAM.ORG (Phillip Vandry)]

swh54716@uxa.cso.uiuc.edu (Scott W. Henson) writes:

>Can the Ctrl-C interrupt be removed from ProDOS and/or Basic.System so
>that programs that run from self-booting disks cannot be terminated during
>the boot sequence (i.e. before they have been loaded and execution has
>started)?  If so, how would one go about patching things to remove the
>interrupt handler?

The problem is that Ctrl-C is neither in ProDOS nor in BASIC.System. It's
in ROM. No matter how you patch BASIC.System, there's always going to be a
short amount of time after BASIC.System has told the ROM to run the program
and before a possible ONERR GOTO executes on the first line.

The nly thing I can tink of, (it would be much more than a simple patch
however) is for BASIC.System to intercept and eat Ctrl-C's before calling
any Applesot code in ROM. And even that may not work because Applesoft
grabs I/O vectors during initialization (probably)
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