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BBus slave and DMA interface
694
NS9750 Hardware Reference
Port Status register, peripheral
Address: 9040 010C
Feature Control Register A
Address: 9040 0114
Feature Control Register A enables buffer trigger levels for printer port operations.
Bits Access Mnemonic Reset Description
D31:08 R Reserved 0x0 N/A
D07 R BUSY 0x0 Allows the CPU to read the status of the peripheral control
pins directly.
The meaning of each bit varies, depending on whether the
mode is compatibility, nibble, byte, or ECP.
D06 R N_ACK 0x0
D05 R PERR 0x0
D04 R SEL 0x0
D03 R N_FLT 0x0
D02:00 R Reserved 0x0 N/A
Table 402: pin — Port Status register, peripheral
BUSY N_ACK PERR SEL N_FLT
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved
Reserved Reserved
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved
Reserved
PPtEn