Hi.
I'm currently in the process of writing a NES emulator. Recently I've been looking at the Dissembled Super Mario (Very helpful. Thanks doppelganger!
). It appears to me that the code is writing directly to the stack memory in the InitializeMemory routine which suggests that i've got the wrong idea about implementing part of the memory.
I currently have the stack set up so that any writes to that part of memory results in the data being stored at the location specified by the stack pointer (The SP is then decremented). Reads read data from the top of the stack and then increment the SP.
I'm thinking now that this is completely wrong and that I should be allowing reads and writes to any part of the stack memory without manipulating the SP and that the only means of using the stack as a stack are via the stack instructions (PHA, PHP etc).
Does this new approach sound correct?
Thank you very much.
I'm currently in the process of writing a NES emulator. Recently I've been looking at the Dissembled Super Mario (Very helpful. Thanks doppelganger!
). It appears to me that the code is writing directly to the stack memory in the InitializeMemory routine which suggests that i've got the wrong idea about implementing part of the memory.
I currently have the stack set up so that any writes to that part of memory results in the data being stored at the location specified by the stack pointer (The SP is then decremented). Reads read data from the top of the stack and then increment the SP.
I'm thinking now that this is completely wrong and that I should be allowing reads and writes to any part of the stack memory without manipulating the SP and that the only means of using the stack as a stack are via the stack instructions (PHA, PHP etc).
Does this new approach sound correct?
Thank you very much
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