Memory map: Difference between revisions
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Internally, all addresses are 64-bits wide. However, when in 32-bit addressing mode, the upper 32 bits are sign-extended. |
Internally, all addresses are 64-bits wide. However, when in 32-bit addressing mode, the upper 32 bits are sign-extended. |
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== Virtual Memory Map == |
== Virtual Memory Map == |
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The is the 32-bit virtual address space (used by most games and homebrew toolchains): |
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{| class="wikitable" |
{| class="wikitable" |
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! colspan=2 | Address Range !! Name !! Description |
! colspan=2 | Address Range !! Name !! Description |
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| 0x80000000 || 0xFFFFFFFF || Unmapped || |
| 0x80000000 || 0xFFFFFFFF || Unmapped || This area is completely ignored by the RCP. Any access in this area will freeze the CPU as the RCP will ignore the read/write and the CPU will never receive a reply. |
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Cartridge Domains 1 and 2 are mapped one-to-one on the cartridge/bottom port. It is not known at this time what Domain 1 Address 3 was used for, if at all, but flash carts may have some use for that address range. |
Cartridge Domains 1 and 2 are mapped one-to-one on the cartridge/bottom port. It is not known at this time what Domain 1 Address 3 was used for, if at all, but flash carts may have some use for that address range. |
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