nivirx/stevia
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases 1 Wiki Activity

remove unreal mode stuff from cdecl16.inc

Browse Source
This commit is contained in:
Elaina Claus
2025-09-05 20:33:00 -04:00
parent 4e5112b45b
commit 130cd22ff1
1 changed files with 0 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
include/cdecl16.inc
View File

@@ -68,59 +68,3 @@
pop bp
%endmacro
%endif
; set ds and es segments back to the base of the loader
%ifnmacro __TINY_DS_ES
%macro __TINY_DS_ES 0
mov ax, __STAGE2_SEGMENT
mov ds, ax
mov es, ax
%endmacro
%endif
; for copying between locations in high memory
%ifnmacro __REFLAT_DS_ES
%macro __REFLAT_DS_ES 0
cli ; no interrupts
lgdt [((__STAGE2_SEGMENT << 4) + unreal_gdt_info)] ; load unreal gdt
mov eax, cr0
or eax, 1 ; set pmode bit
mov cr0, eax ; switch to pmode
jmp short $+2 ; i-cache flush
mov ax, 0x10 ; select descriptor 2
mov ds, ax
mov es, ax
mov eax, cr0
and eax, ~1 ; toggle bit 1 of cr0
mov cr0, eax ; back to realmode
jmp short $+2 ; i-cache flush
sti
%endmacro
%endif
; for copying from low memory to high memory (ds on a real segment, es in flat mode)
%ifnmacro __REFLAT_ES
%macro __REFLAT_ES 0
cli ; no interrupts
lgdt [((__STAGE2_SEGMENT << 4) + unreal_gdt_info)] ; load unreal gdt
mov eax, cr0
or eax, 1 ; set pmode bit
mov cr0, eax ; switch to pmode
jmp short $+2 ; i-cache flush
mov ax, 0x10 ; select descriptor 2
mov es, ax
mov eax, cr0
and eax, ~1 ; toggle bit 1 of cr0
mov cr0, eax ; back to realmode
jmp short $+2 ; i-cache flush
sti
%endmacro
%endif