RTL8139: Difference between revisions

 

ex:

char rx_buffer[8192+16]; // declare the local buffer space (8k + header)

outportd(0x30, (unsigned long)rx_buffer); // send dword memory location to RBSTART (0x30)

=== Set IMR + ISR ===

 

 

ex:

outportw(0x3C, 0x0005); // Sets the TOK and ROK bits high

NB: When you handle an interrupt, you ''have'' to write the bit corresponding to the interrupt to reset it. The doc says reading the register is enough to reset the buffer to zero and writing has no effect. ''This is not the case on QEmu'', and probably on some/most hardware too. Writing a bit when it has no effect will probably not hurt.

 

 

Example:

outportl(0x44, 0xf | (1 << 7)); // (1 << 7) is the WRAP bit, 0xf is AB+AM+APM+AAP

=== Enable Receive and Transmitter ===

 

 

ex:

outportb(0x37, 0x0C); // Sets the RE and TE bits high

== Related Articles ==