Hi,
The Stack is an internal 8 bits register of the 6502
CPU. It works countdown.
> Where is it ?
> at the end of the 128 bytes of ram ?
well everywhere you want but indeed in VCS programs it
is better to located at address #$FF (the end of ram)
using the commands :
LDX #$FF
TXS
> If so can you address it like a normal
> variable ?
not really, "Playing" with stack is related to special
operations.
Some commands are related to Stack operations :
PHA : Push accumulator on stack
PLA : Pull accumulator from stack
TSX : Transfer Stack pointer to index X
TXS : Transfer index X to Stack pointer.
it's modified by operations like JSR (return address
is pushed) and RTS (return address is pulled)too.
Take care
Chris.
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