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Allow loading images > 16M

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This commit is contained in:
Erik van der Kouwe 2010-04-29 15:14:07 +00:00
parent 4e837dcfb3
commit 3bf54e9b2b
1 changed files with 2 additions and 0 deletions
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boot/boothead.s
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@ -301,10 +301,12 @@ smallcopy:
ext_copy: ext_copy:
mov x_dst_desc+2, ax mov x_dst_desc+2, ax
movb x_dst_desc+4, dl ! Set base of destination segment movb x_dst_desc+4, dl ! Set base of destination segment
movb x_dst_desc+7, dh
mov ax, 8(bp) mov ax, 8(bp)
mov dx, 10(bp) mov dx, 10(bp)
mov x_src_desc+2, ax mov x_src_desc+2, ax
movb x_src_desc+4, dl ! Set base of source segment movb x_src_desc+4, dl ! Set base of source segment
movb x_src_desc+7, dh
mov si, #x_gdt ! es:si = global descriptor table mov si, #x_gdt ! es:si = global descriptor table
shr cx, #1 ! Words to move shr cx, #1 ! Words to move
movb ah, #0x87 ! Code for extended memory move movb ah, #0x87 ! Code for extended memory move