Octagon XE-800, Reference Manual

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}
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 (User area relative address)
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
}
Read multiple words from the serial EEPROM
Function: fch
Subfunction: 02h
Purpose: To read multiple words from the on–board serial
EEPROM.
Calling registers: AH fch
AL 02h
BX Word address (zero based)
CX Word count
DX ffffh
ES:DI Destination pointer
Return registers: Carry flag cleared if successful
AX Word read
Carry flag set if error
AL Error code
Error Code Meaning
ffh Unknown error
01h Function not implemented
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