Octagon 6000 Series, Руководство пользователя, Страница: 137 / 233

17-4
Serial EEPROM 6000 Series user’s manual
Calling registers: AH fch
AL 03h
BX Word address (zero based)
CX Word count
DX ffffh
DS:SI Source pointer
Return registers: Carry flag cleared if successful
Carry flag set if error
AL
Error code
Error Code Meaning
ffh Unknown error
01h Function not implemented
02h Defective serial EEPROM
03h Illegal access
Comments: This function writes multiple words to the user area of
the serial EEPROM.
Programming example:
/* Write 8 words starting at word 6*/
unsigned int far *seeDataPtr = new unsigned int[8]; /*
Allocate storage*/
unsigned int far* tmpPtr = seeDataPtr;
for(int i=0;i<8;i++)
*seeDataPtr = i;
/* initialize data */
/* Inline assembly code for Borland C++ 3.1 */
asm {
push ds
mov ax,0fc03h
mov bx,06h /* Write starts at word 6 */
mov cx,8 /* Write 8 words */
mov dx,0ffffh
lds si,seeDataPtr
int 17h
pop ds
}
Return serial EEPROM size
Function: fch
Subfunction: 04h
Purpose: To obtain the size of the on-board serial EEPROM.
Calling registers: AH fch
AL 04h
DX ffffh
Return registers: Carry flag cleared if successful
AX
Size of the serial EEPROM (in words)
BX Size available to user (in words)