Re: LZ: ZShell 4.5
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-> Steve Wrobleski wrote:
-> >
-> > Wouldnt it be possible to add a couple of bytes to ZShell 4.5 that
-> would > always stay at a fixed address? Say like 20-30 or so. That
-> way we could > put in interrupt handlers and theyd always be at the
-> same place. thatd > work, wouldnt it?
-> >
-> > --Steve
-> the interrupt handlers are already at a fixed place in ROM. see some
-> of the source code at ticalc.org for more information on using
-> interrupts. PCoMP
-> Visit Maximus Productions home page at:
-> http://www.ntsource.com/~pcomp
What could be done would be to have an interrupt vector stored somewhere
in memory so that you could chain interrupts. so ZShell would only hook
(INT mode 2) the interrupt and call the address of the current
interrupt.
( this might not be worth it since, well there isn't all too much memory
where you could put an interrupt routine )
References: