RTL8139: Difference between revisions
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<source lang="c"> |
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char rx_buffer[8192+16]; // declare the local buffer space (8k + header) |
char rx_buffer[8192+16]; // declare the local buffer space (8k + header) |
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outportd(0x30, (unsigned long)rx_buffer); // send dword memory location to RBSTART (0x30) |
outportd(0x30, (unsigned long)rx_buffer); // send dword memory location to RBSTART (0x30) |
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</source> |
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=== Set IMR + ISR === |
=== Set IMR + ISR === |
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<source lang="c"> |
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outportw(0x3C, 0x0005); // Sets the TOK and ROK bits high |
outportw(0x3C, 0x0005); // Sets the TOK and ROK bits high |
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</source> |
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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. |
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. |
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Example: |
Example: |
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<source lang="c"> |
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outportl(0x44, 0xf | (1 << 7)); // (1 << 7) is the WRAP bit, 0xf is AB+AM+APM+AAP |
outportl(0x44, 0xf | (1 << 7)); // (1 << 7) is the WRAP bit, 0xf is AB+AM+APM+AAP |
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</source> |
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=== Enable Receive and Transmitter === |
=== Enable Receive and Transmitter === |
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<source lang="c"> |
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outportb(0x37, 0x0C); // Sets the RE and TE bits high |
outportb(0x37, 0x0C); // Sets the RE and TE bits high |
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</source> |
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== Related Articles == |
== Related Articles == |
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