Compaq TRU64 AA-RNG2A-TE - Manual (Page 39)

ASI_RSIZE8 Indicates a RAM size of 8 kilobytes (the default).
ASI_RSIZE32 Indicates a RAM size of 32 kilobytes.
2.5 Window 1 Operational Register Offset Definitions
The window 1 operational registers include such registers as the receive
status, the transmit status, and the request interrupt registers, as shown in
Figure 2–3.
Figure 2–3: Window 1 Operational Registers
Register
Receive Status Register
ZK-1269U-AI
Constant
W1_RXSTAT
Transmit Status Register W1_TXSTAT
Request Interrupt After
Transmit Completion Register
TX_INT
Receive Data Register W1_RXDATA
Transmit Data Register W1_TXDATA
Free Transmit Bytes Register W1_FREETX
The following code shows the offset definitions for the window 1 operational
registers:
#define W1_RXSTAT 0x8 1
enum w1_rxstat { 2
RX_IC=0x8000,
RX_ER=0x4000,
RX_EM=0x3800,
RX_EOR=0x0000,
RX_ERT=0x1800,
RX_EAL=0x2000,
RX_ECR=0x2800,
RX_EOS=0x0800,
RX_BYTES=0x7ff
};
#define W1_TXSTAT 0xb 3
enum w1_txstat { 4
TX_CM=0x80,
TX_IS=0x40,
TX_JB=0x20,
TX_UN=0x10,
TX_MC=0x08,
TX_OF=0x04,
TX_RE=0x02
Defining Device Register Offsets 2–9