Write A Single Word To The Serial Eeprom; Read Multiple Words From The Serial Eeprom - Octagon Systems XE–700 Reference Manual

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Write a single word to the serial EEPROM

Function:
Subfunction:
Purpose:
Calling registers:
Return registers:
Error code
Comments:
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:
Subfunction:
Purpose:
Calling registers:
Return registers:
Error Code
fch
01h
To write a single word to the on–board serial
EEPROM.
AH fch
AL 01h
BX Word address (zero based)
CX Data word to write
DX ffffh (User area relative address)
9876h (Absolute address)
Carry flag cleared if successful
Carry flag set if error
AL Error code
Meaning
ffh Unknown error
01h Function not implemented
02h Defective serial EEPROM
03h Illegal access
This function writes a word to the user area of
the serial EEPROM.
fch
02h
To read multiple words from the on–board serial
EEPROM.
AH fch
AL 02h
BX Word address (zero based)
CX Word count
DX ffffh (User area relative address)
ES:DI Destination pointer
Carry flag cleared if successful
AX Word read
Carry flag set if error
AL Error code
Meaning
ffh Unknown error
01h Function not implemented
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