Spexeah/Asuro
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Added scripts for debug

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git-svn-id: https://spexeah.com:8443/svn/Asuro@24 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
This commit is contained in:
kieron
2017-05-16 13:27:16 +00:00
parent 85f0849123
commit 2ce7ccc265
14 changed files with 35 additions and 10 deletions
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11
src/gdt.pas
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@ -4,7 +4,8 @@ interface
uses
util,
types;
types,
console;
procedure create(base : dword; limit : dword; flags : byte);
procedure init();
@ -22,7 +23,7 @@ type
implementation
var
GDTarr : array [0..5] of TSegmentDescriptor;
GDTarr : array [0..2] of TSegmentDescriptor;
GDTptr : PSegmentDescriptor;
GDT_length : integer = 0;
@ -38,19 +39,19 @@ begin
descriptor_ptr:= @descriptor[0];
s_descriptor_ptr:= @s_descriptor;
if limit <= 65536 then begin
descriptor[6] := $40 //1 <-- Will be overwritten by 2.
descriptor[6] := $40;
end else begin
if (limit and $FFF) <> $FFF then begin
limit := (limit SHR 12) - 1;
end else begin
limit := limit SHR 12;
end;
descriptor[6] := $C0; //2 <-- Will be overwritten by 3;
descriptor[6] := $C0;
end;
descriptor[0] := limit and $FF;
descriptor[1] := (limit shr 8) and $FF;
descriptor[6] := descriptor[6] or ((limit shr 16) and $F); //3 <-- has now overwritten both $C0 and $40 is now equal to limit or'd with limit shifted right 16 bits and constant $0F
descriptor[6] := descriptor[6] or ((limit shr 16) and $F);
descriptor[2] := base and $FF;
descriptor[3] := (base shr 8) and $FF;

8
src/kernel.pas
View File

@ -19,11 +19,12 @@ var
c : byte;
mbi : Pmultiboot_info_t;
mbm : DWORD;
dds : DWORD;
begin
mbi:= mbinfo;
mbm:= mbmagic;
gdt.init();
//gdt.init();
console.init();
console.writestringln('Booting Asuro...');
if (mbm <> MULTIBOOT_BOOTLOADER_MAGIC) then begin
@ -33,6 +34,11 @@ begin
util.halt_and_catch_fire;
end;
console.clear();
asm
MOV dds, DS
end;
console.writehexln(dds);
util.halt_and_catch_fire;
console.setdefaultattribute(console.combinecolors(Green, Black));
console.writestringln('Asuro Booted Correctly!');
console.writestringln('');