SECTION 6
Conversions and Interfaces
PEN*KEY
R
6100 Computer Programmer’s Reference Guide 6-63
INT 13h, Function AH = EAh: Enable RAM Drive
BIOS
Reprograms the memory controller to enable access to the RAM associated with
the RAM drive.
On Entry:
AH = 0EAh
DL = 0
On Return:
AH = 0
INT 13h, Function AH = ECh: Enable Checksum
BIOS
Copies the following RAM drive signature into the reserved portion of the RAM
drive logical boot sector.
_RamDriveSignature label byte
db “Norand RamDrive”,0
db 0,0, 0Fh, 0FFh,0FFh,0FFh
db 0F0h, 3Ch,99h,0C3h, 55h,0AAh
On Entry:
AH = 0ECh
ES:SI = Pointer to global descriptor table (GDT):
offset
00h = Uninitialized, null descriptor
08h = Uninitialized, is made into GDT descriptor
10h = Uninitialized, descriptor for source of move
18h = Uninitialized, descriptor for destination of move
20h = Uninitialized, used by BIOS
28h = Uninitialized, is made into SS descriptor 0
On Return:
Carry = 0 (if no error)
1 (if error)
AH = Return code
00h = Normal return
01h = Parity error
02h = Interrupt error
03h = Address line 20 gating failed
6. Conversions and
Interfaces
Содержание PEN*KEY 6100
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Страница 22: ...Preface 8 PEN KEYR 6100 Computer Programmer s Reference Guide PREFACE ...
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