Difference between revisions of "Sethwaddr"
(New page: '''sethwaddr (IXCALL 0x3E51)''' - set the MAC address '''gethwaddr (HLCALL 0x3E54)''' - get the MAC address == Synopsis == ''Assembly language'' ld hl, hw_addr ; location in m...) |
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The C function sethwaddr() returns -1 if the hardware address was not successfully set, and 0 if the address was set. | The C function sethwaddr() returns -1 if the hardware address was not successfully set, and 0 if the address was set. | ||
The assembly language routine returns with the carry flag set on error, and the carry flag reset on success. | |||
[[Category:Spectranet]] | [[Category:Spectranet]] | ||
Revision as of 22:18, 28 August 2008
sethwaddr (IXCALL 0x3E51) - set the MAC address gethwaddr (HLCALL 0x3E54) - get the MAC address
Synopsis
Assembly language
ld hl, hw_addr ; location in memory of 6 byte MAC address
ld ix, SETHWADDR
call IXCALL
jr c, .error
ld de, hw_addr ; location in memory of a 6 byte buffer to store MAC address
ld hl, GETHWADDR
call HLCALL
C
#include <spectranet.h>
/* hw_addr points to a 6 byte buffer */
int sethwaddr(char *hw_addr);
void gethwaddr(char *hw_addr);
Description
The sethwaddr and gethwaddr routines set the hardware (MAC) address and retrieve the hardware address respectively. For sethwaddr, the parameter hw_addr points to a 6 byte array containing a valid 6 byte MAC address. For gethwaddr, the parameter hw_addr points to 6 bytes of storage where the current MAC address will be returned.
The sethwaddr() function checks that the hardware address was successfully set. The function makes an immediate change to the hardware address, but does not make a permanent change; permanent changes must be written to the configuration area in flash.
Return values
The C function sethwaddr() returns -1 if the hardware address was not successfully set, and 0 if the address was set.
The assembly language routine returns with the carry flag set on error, and the carry flag reset on success.