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Changes
6502
,→Memory
||01||Stack||$0100||$01FF||Values are pushed to, and pulled (popped) from, this region in first-in last-out (FILO) order. The stack descends as it is used - more recently-pushed values are stored at lower addresses than older values. The stack wraps around, so if more than 256 bytes are pushed, the oldest values will be overwritten.
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||FF||Vector Table||$FF00||$FFFF||The last 6 bytes of this page contain three 2-byte addresses. $FE contains a pointer to code which is run when an interrupt request is received; $FC contains a pointer to code which is run when the CPU is reset (including when it is first started); and $FA contains a pointer to code which is run when a non-maskable interrupt (NMI) is received. (Note that the 6502 BRK instruction is counted as an NMI, and the B status flag can be used to determine if a hardware NMI or BRK instruction was received).
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