General Software® BIOS
CPB902
C P B 9 0 2 U s e r M a n u a l
82
© 2 0 0 8 F a s t w e l v . 1 . 5 b E
5.10
Reset CMOS to Factory Defaults from a Remote PC
CMOS_RST.COM is a software utility, which allows to reset the BIOS setup parameters stored in
CMOS memory to factory defaults from a remote PC. To do so, follow the procedure below.
1.
Connect COM1 port of CPB902 to a PC COM port with a null-modem cable;
2.
Start CMOS_RST.COM on a remote PC with the parameter:
CMOS_RST.COM COM2
where COM2 is a name of a PC COM port, to which the module is connected;
3.
Switch on the module power. The PC monitor should display the following
message:
“Reset acknowledged”
5.11
Extended BIOS Functions
5.11.1
User Programs Interface with FRAM Memory Units
INT17H BIOS function is used to address FRAM memory. FRAM size available to user
is 7 KB.
For read mode the following parameters are set:
ah = 0;
bx = address (offset) in the FRAM user area (0...1BFFh);
cx = number of bytes to read;
dx = 4657h ('FW');
es:[di] = <read data buffer>
For write mode the following parameters are set:
ah = 1;
bx = address (offset) in the FRAM user area (0...1BFFh);
cx = number of bytes to write;
dx = 4657h ('FW');
ds:[si] = write data buffer
On completion the functions return the result in C (CF) tag: NC = OK; CY = Error.
