Re: A86: Re: stop
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Re: A86: Re: stop
Most of these are associated with a call to $479f, both in the ROM and in the
demo program. Do you know what this call is?
Kirk Meyer wrote:
> Okay, alright already I'll tell you. (IY+$24) contains flags for running
> special programs. These programs and there corresponding bits are as
> follows:
> 0: (sqrt)PARSE
> 1: (sqrt)FORM
> 2: (sqrt)EXEC
> 3: (sqrt)EXPR [I'm not sure about that one... it might be 6,(IY+$23)]
> 4: (sqrt)HOME
> 5: (sqrt)CMDTOK
> 6: (sqrt)KEY
> 7: (sqrt)GRF
> if these bits are set and these programs exist, then they are run whenever
> the specified action occurs. therefore if you move some code into a new
> program called (sqrt)whatever then it will be called every time your
> specified thing happens. in the TI demo it installs #6, (sqrt)KEY and if it
> sees you are at a memory screen (by looking at _CXCURAPP) it does some stuff
> to make sure you don't delete anything. i think, for example, it would be
> possible to make a routine that ran every time you went to the home screen
> (#4), every time you went to the graph screen (#7), every time you enter a
> command must be processed (#0), every time a program is run (#2), etc. i
> haven't tried any of these so feel free to correct me if i'm wrong.
> Kirk
> _@ibm.net
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