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ST486DX Scheda tecnica(PDF) 19 Page - STMicroelectronics

Il numero della parte ST486DX
Spiegazioni elettronici  PROGRAMMING MANUAL
PDF  34 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST486DX Scheda tecnica(HTML) 19 Page - STMicroelectronics

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ST486DX - SMM SOFTWARE CONSIDERATIONS
29
svts
cs:,save_tsr
;str is not valid in real mode
db
66h
;32bit version saves everything
sgdt
fword ptr cs:[save_gdt]
db
66h
;32bit version saves everything
sidt
fword ptr cs:[save_idt]
; at the end of the SMM routine the following code
; sequence will reload the entire CPU state
mov
eax,cs:save_eax
mov
ebx,cs:save_ebx
mov
ecx,cs:save_ecx
mov
edx,cs:save_edx
mov
esi,cs:save_esi
mov
edi,cs:save_edi
mov
ebp,cs:save_ebp
mov
esp,cs:save_esp
rsdc
ds,cs:,save_ds
rsdc
es,cs:,save_es
rsdc
fs,cs:,save_fs
rsdc
gs,cs:,save_gs
rsdc
ss,cs:,save_ss
rsldt
cs:,save_ldt
rsts
cs:,save_tsr
db
66h
sgdt
fword ptr cs:[save_gdt]
db
66h
sidt
fword ptr cs:[save_idt]
; the data space to save the CPU state is in
; the Code Segment for this example
save_ds
dt
?
save_es
dt
?
save_fs
dt
?
save_gs
dt
?
save_ss
dt
?
save_ldt
dt
?
save_tsr
dt
?
save_eax
dd
?
save_ebx
dd
?
save_ecx
dd
?
save_edx
dd
?
save_esi
dd
?
save_edi
dd
?
save_ebp
dd
?
save_esp
dd
?
save_gdt
df
?
save_idt
df
?



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