Table of Contents
Advertisement
1142-1145
T h e v e c t o r t o t h e r o u t i n e t o u s e w h e n T O S f u n c t i o n s w i s h to r e a d o r w r i t e
to th e h a r d d i s k . T h is r o u t i n e is in s t a l l e d w h e n t h e h a r d d i s k is in iti a liz e d ,
a n d s h o u l d f o llo w t h e c a lli n g s e q u e n c e o f t h e n o r m a l B I O S R w a b s ( ) f u n c
t i o n . A v a l u e o f 0 is s t o r e d h e r e if n o h a r d d i s k is a t t a c h e d .
1146-1149
V e c t o r t o t h e r o u t i n e u s e d t o b o o t f r o m t h e h a r d d i s k . A v a l u e o f 0 is
s t o r e d h e r e if n o h a r d d i s k is a t t a c h e d .
1150-1153
T h e v e c t o r to t h e r o u t i n e to u s e w h e n t h e M e d i a c h b ( ) r o u t i n e r e q u e s t s i n
f o r m a t i o n a b o u t a h a r d d i s k 's m e d i a c h a n g e s t a t u s . T h is r o u t i n e is in s t a lle d
w h e n t h e h a r d d i s k is in iti a liz e d , a n d s h o u l d f o llo w t h e c a lli n g s e q u e n c e o f
th e n o r m a l B I O S M e d i a c h ( ) f u n c t i o n . A v a l u e o f 0 is s t o r e d h e r e if n o
h a r d d i s k is a t t a c h e d .
1154-1155
W h e n th is l o c a t i o n c o n t a i n s a n o n z e r o v a l u e , t h e s y s t e m a t t e m p t s t o lo a d
a n d e x e c u t e a p r o g r a m c a lle d C O M M A N D .P R G f r o m t h e b o o t d e v i c e . T h is
m a k e s it p o s s ib le t o lo a d a n a p p l i c a t i o n o t h e r t h a n t h e G E M D e s k t o p a t
b o o t ti m e . S t o r e a n o n z e r o v a l u e h e r e f r o m t h e d i s k 's b o o t c o d e .
1156
T h is b y t e c o n t a i n s a n u m b e r o f f la g b i ts t h a t c o n t r o l v a r i o u s a s p e c t s o f th e
c o n s o l e d e v i c e 's f u n c t i o n i n g :
B i t S e t
A c t i o n
0
E n a b le k e y -c lic k s o u n d w h e n k e y is p r e s s e d
1
E n a b le k e y r e p e a t
2
E n a b le b e ll s o u n d w h e n a C T R L - G c h a r a c t e r (A S C I I 7 ) is w r i t t e n
t o C O N :
3
C a u s e t h e B IO S B c o n i n ( ) f u n c t i o n t o r e t u r n i n f o r m a t i o n a b o u t
t h e s h if t k e y s t a t u s f r o m k b s h if t in b i ts 2 4 - 3 1
1157
398
APPENDIX K
hdv_rw
hdv__boot
hdv__mediach
__cmdload
conterm
reserved
($476-$479)
($47A-$47D)
($47E-$481)
($482-$483)
($484)
($485)
Hide quick links:
Advertisement
Table of Contents
