Intel SRMK2 - Server Platform - 0 MB RAM, Технические характеристики

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Intel® SRMK2 Internet Server Technical Product Specification 76
This token is of the following format:
MSB LSB
15
…
12 11
…
0
# of bits available - 1 Bit offset from start of CMOS of first bit
The most significant 4 bits will be equal to the number of CMOS bits available minus 1. This field
will be equal to 3 since there are four CMOS bits available. The 12 least significant bits will
define the position of the CMOS bit in the RTC (Real Time Clock). This will be a bit address
rather than a byte address. The CMOS byte location is 1/8th of the 12-bit number, and the
remainder will be the starting bit position within that byte. For example, if the 12-bit number is
0109h, the user binary can use bit 1 of CMOS byte 0108h/8, or 021h.
The following code fragment shows the header and format for a User Binary:
.286
db 55h,0AAh,10h ; USER binary signature is 55h,AAh
; 10h = size of user binary area
; 8k = 10h*512 bytes
MyCode PROC FAR ; MUST be a FAR procedure
;*** Use for normal CU controllable user binaries
;
; RETF ; Signal to BIOS that what follows
; is a standard user binary
; that will be used if the Scan User
; Flash CU selection is enabled.
;***
;*** Use for Mandatory user binaries
;
; db 0CBh ; Signal to BIOS that what follows
; is a user binary that
;***
db 04h ; Bit map to define call points, a
; one in any bit specifies that the
; BIOS will be called at that scan
; point in POST (scan points to be
; defined
;*** jump table for each scan point
JMP scanpoint_01h ; follows a list of 8 transfer
JMP scanpoint_02h ; addresses, one for each bit in the
JMP scanpoint_04h ; bitmap. In all likelihood, only
JMP scanpoint_08h ; one of these will be used, earlier
JMP scanpoint_10h ; entries must be present, later can
JMP scanpoint_20h ; be omitted if desired.
JMP scanpoint_40h
JMP scanpoint_80h
;* it is extremely important that this table's assembled code appears
;* as a jump table in real mode (jmps must be e9 xx 00 00) for each entry.
;* some assemblers will change the jmp to eb xx yy 00 00 or do a long
;* jump eb xx yy 00 00 00 00 which will create incorrect offsets. That is
;* why the .286 directive was used with masm 6.11. .586p is used to insert
;* instructions that do not appear in the 286 instruction set and to maintain
;* the offsets in the table.
; In this example since the mask is defined as 04h only scanpoint_04h
; will be executed during post. This happens to occur just before video