From: Joshua Wise Date: Fri, 5 Sep 2008 20:32:18 +0000 (-0400) Subject: Change the attrib register, remove the org 0x0 / shift it to org 0xA8000 X-Git-Url: http://git.joshuawise.com/netwatch.git/commitdiff_plain/eee8da2e51c7dff346a9cf7ed4d25363d08d9408?ds=inline;hp=--cc Change the attrib register, remove the org 0x0 / shift it to org 0xA8000 --- eee8da2e51c7dff346a9cf7ed4d25363d08d9408 diff --git a/aseg/aseg.asm b/aseg/aseg.asm index 51a2811..f10955a 100644 --- a/aseg/aseg.asm +++ b/aseg/aseg.asm @@ -1,4 +1,4 @@ - org 0x0 + org 0xA8000 [bits 16] entry: ; mov al, 0x01 ; Say where we are. @@ -9,16 +9,16 @@ entry: mov fs, ax mov gs, ax mov ss, ax - jmp 0xA800:entry2 ; Long jump to a correct cs. + jmp 0xA800:(entry2-0xA8000) ; Long jump to a correct cs. entry2: ; mov al, 0x02 ; out 0x80, al - lgdt [gdtr] ; Set up a new GDT. + lgdt [(gdtr-0xA8000)] ; Set up a new GDT. mov eax, 0x1 mov cr0, eax ; ... and enter pmode! mov al, 0x03 ; Say we got here. out 0x80, al - jmp long 0x10:(continue+0xA8000) ; Now longjmp into the new code. + jmp long 0x10:continue ; Now longjmp into the new code. [bits 32] continue: ; mov al, 0x04 ; Now we're in protected mode. @@ -35,13 +35,13 @@ continue: ; mov al, 0x05 ; out 0x80, al - mov al, [(cstat + 0xA8000)] + mov al, [cstat] add al, 1 out 0x80, al - mov [(cstat + 0xA8000)], al + mov [cstat], al mov eax, 0x11223344 - mov dword [(status + 0xA8000)], eax + mov dword [status], eax mov dx, 0xCF8 ; save off the old config value in dword eax, dx @@ -73,17 +73,17 @@ continue: shl eax, 1 add eax, 0xB8000 ; yay mov byte [eax+0], '1' - mov byte [eax+1], 0xA0 + mov byte [eax+1], 0x1F mov byte [eax+2], '5' - mov byte [eax+3], 0xA0 + mov byte [eax+3], 0x1F mov byte [eax+4], '-' - mov byte [eax+5], 0xA0 + mov byte [eax+5], 0x1F mov byte [eax+6], '4' - mov byte [eax+7], 0xA0 + mov byte [eax+7], 0x1F mov byte [eax+8], '1' - mov byte [eax+9], 0xA0 + mov byte [eax+9], 0x1F mov byte [eax+10], '2' - mov byte [eax+11], 0xA0 + mov byte [eax+11], 0x1F mov dx, 0x3D4 mov al, [esp-6] @@ -115,7 +115,7 @@ continue: align 0x4 gdtr: db 0x27, 0x00 - dd (gdt + 0xA8000) + dd gdt align 0x4 gdt: db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00