11/2/2001 10:13:52 AM, "Joel Park" <joelp@xxxxxxxxxxxxxxxxxx> wrote:
>Thank you for the Answers. You totally confirmed any assumptions I may
>have had. It really helps to picture Stella as a whole.
>
>I've got to say that I'm getting excited about this stuff.
>I'm a Visual Basic Programmer by profession, it's fantastic to find
>something I can do that is so far from programming Visual Basic.
Heh, Me Too. I write VB for a living, and Stella is a totally different
experience. Give me VB or give me assembler; none of this wussy
inbetween stuff like C++. :)
>Thanks again for all your help, y'all never let me down.
A further note:
>> The second half is the famous 128 byte RAM. As you
>> already found out, it's ranging from $80 - $FF.
>>
>> So all RAM access is actually in the zeropage, which
>> means there's very fast access here. (Any serious C64
>> coder would sell his grandma for 128 Bytes free zeropage
>> RAM, BTW :-))
That RAM is also mirrored (access the same bytes through different
addresses) at $180-$1FF. When RAM is accessed via the stack
manipulation instructions (PHA/PLA/PHP/PLP/JSR/RET), the
6502 uses the $180-$1FF addresses -- that is, the stack is in
page 1.
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