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RTL8029AS

Realtek PCI Full-Duplex Ethernet Controller with built-in SRAM

Realtek Semiconductor 

RTL8029AS Preliminary

1

CRC CRC error bit reflects packet received with CRC error. This bit will also be set

for FAE errors. Increment CNTR1 tally counter.

0

PRX

This bit indicates packet received with no errors.

CLDA0,1: Current Local DMA Registers (01H & 02H; Type=R in Page0)

These two registers can be read to get the current local DMA address.

PSTART: Page Start Register (01H; Type=W in Page0, Type=R in Page 2)

The Page Start register sets the start page address of the receive buffer ring.

PSTOP: Page Stop Register (02H; Type=W in Page0, Type=R in Page2)

The Page Stop register sets the stop page address of the receive buffer ring.

BNRY: Boundary Register (03H; Type=R/W in Page0)

This register is used to prevent overwrite of the receive buffer ring. It is typically used as a

pointer indicating the last receive buffer page the host has read.

TPSR: Transmit Page Start Register (04H; Type=W in Page0)

This register sets the start page address of the packet to the transmitted.

TBCR0,1: Transmit Byte Count Registers (05H & 06H; Type=W in Page0)

These two registers set the byte counts of the packet to be transmitted.

NCR: Number of Collisions Register (05H; Type=R in Page0)

The register records the number of collisions a node experiences during a packet

transmission.

FIFO: First In First Out Register (06H; Type=R in Page0)

This register allows the host to examine the contents of the FIFO after loopback.

CRDA0,1: Current Remote DMA Address registers (08H & 09H; Type=R in Page0)

These two registers contain the current address of remote DMA.

RSAR0,1: Remote Start Address Registers (08H & 09H; Type=W in Page0)

These two registers set the start address of remote DMA.

RBCR0,1: Remote Byte Count Registers (0AH & 0BH; Type=W in Page0)

These two registers set the data byte counts of remote DMA.

CNTR0: Frame Alignment Error Tally Counter Register (0DH; Type=R in Page0)

LS009.0

16

1997.01.16

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