Acorn ANFS 4.18 Memory Map

← Acorn NFS and Acorn ANFS

Addresses outside the ROM used by Acorn ANFS 4.18 at run time — zero-page workspace, RAM buffers, and memory-mapped I/O. For the ROM code itself (&8000–&BFFF), see the disassembly listing.

Index bases

Addresses used only as an indexing base — the operand names a base and the byte actually touched is base + X (or + Y), where the index register is a caller-supplied offset, never zero. The literal byte at the base address is never read or written, so these are documented here rather than on the memory map: they are bases, not locations the ROM owns.

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