diff options
Diffstat (limited to 'baremetal')
| -rw-r--r-- | baremetal/boot.hex | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/baremetal/boot.hex b/baremetal/boot.hex index 8c7f301f..65fb7800 100644 --- a/baremetal/boot.hex +++ b/baremetal/boot.hex @@ -36,10 +36,11 @@ # Don't panic! This file doesn't contain any loops or function calls. 80% of # it is data. One pass through less than 1KB of code (there's lots of # padding), and then we jump into a better notation. The rest of the stack -# (really only in a couple of slightly higher-level places) only needs to know +# (really only in a couple of slightly higher-level places) needs to know just # a few magic constants: # Video memory: start is stored at 0x8128 # Keyboard buffer: starts at 0x8028 +# Buffer of mouse events: starts at 0x8090 # Outline of this file with offsets and the addresses they map to at run-time: # -- 16-bit mode code @@ -49,14 +50,15 @@ # f8 (address 7ca0) <== gdt_descriptor # -- 32-bit mode code # offset 100 (address 7d00): boot code -# 1fe (address 7dfe) boot sector marker (2 bytes) +# -- 1fe (address 7dfe) boot sector marker (2 bytes) # offset 200 (address 7e00): interrupt handler code # offset 300 (address 7f00): mouse handler code # -- 32-bit mode data # offset 400 (address 8000): handler data # 410 (address 8010): keyboard handler data # 428 (address 8028) <== keyboard buffer -# 480 (address 8080) <== mouse buffer +# 480 (address 8080): mouse handler data +# 490 (address 8090) <== mouse buffer # offset 500 (address 8100): video mode data (256 bytes) # 528 (address 8128) <== start of video RAM stored here # offset 600 (address 8200): interrupt descriptor table (1KB) |