Octagon 6000 Series, User Manual, Page: 135 / 233

17-2
Serial EEPROM 6000 Series user’s manual
Comments: This function reads a word from the user area of the serial
EEPROM.
Programming example:
/* Read word 2 */
unsigned int seeData;
/* Inline assembly code for Borland C++ 3.1 */
asm {
mov
ax,0fc00h
mov bx,02h /* Read word 2 */
mov dx,0ffffh
int 17h
mov seeData,ax /* store data in c environment */
}
Write a single word to the serial EEPROM
Function: fch
Subfunction: 01h
Purpose: To write a single word to the on-board serial EEPROM.
Calling registers: AH fch
AL
01h
BX Word address (zero based)
CX Data word to write
DX ffffh
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 a word to the user area of the serial
EEPROM.
Programming example:
/* Write 0x1234 to word 3*/
unsigned int seeData = 0x1234;
/* Inline assembly code for Borland C++ 3.1 */
asm {
mov
ax,0fc01h
mov bx,03h /* Write word 3 */
mov cx,seeData /* Get write data from c environment */
mov dx,0ffffh
int 17h
}