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Diffstat (limited to 'i386/pc/NOTES')
| -rw-r--r-- | i386/pc/NOTES | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/i386/pc/NOTES b/i386/pc/NOTES new file mode 100644 index 0000000..d165aa4 --- /dev/null +++ b/i386/pc/NOTES @@ -0,0 +1,34 @@ + + +i16_raw.c: + Provides a default implementation + of real/pmode switching code. + Assumes that, as far as it's concerned, + low linear address always map to physical addresses. + (The low linear mappings can be changed, + but must be changed back before switching back to real mode.) + + Provides: + i16_raw_switch_to_pmode() + i16_raw_switch_to_real_mode() + + i16_raw_start() + Called in real mode. + Initializes the pmode switching system, + switches to pmode for the first time, + and calls the 32-bit function raw_start(). + + Depends on: + + paging.h: + raw_paging_enable() + raw_paging_disable() + raw_paging_init() + + a20.h: + i16_enable_a20() + i16_disable_a20() + + real.h: + real_cs + |