Specifications

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Table 2-18C. AT Expansion Bus Connector, C0-C19 (J10)
PIN SIGNAL NAME FUNCTION IN/OUT
C0 GND (*) Ground ---
C1 SBHE Bus High Enable i/o
C2 LA23 Address bit 23 i/o
C3 LA22 Address bit 22 i/o
C4 LA21 Address bit 21 i/o
C5 LA20 Address bit 20 i/o
C6 LA19 Address bit 19 i/o
C7 LA18 Address bit 18 i/o
C8 LA17 Address bit 17 i/o
C9 -MEMR Memory Read i/o
C10 -MEMW Memory Write i/o
C11 SD8 Data bit 8 i/o
C12 SD9 Data bit 9 i/o
C13 SD10 Data bit 10 i/o
C14 SD 11 Data bit 11 i/o
C15 SD12 Data bit 12 i/o
C16 SD13 Data bit 13 i/o
C17 SD14 Data bit 14 i/o
C18 SD15 Data bit 15 i/o
C19 GND (*) Ground i/o
(*) Note: C1 – C18 are the standard AT bus edgecard
connector signals; C0 & C19 are extra grounds,
and can be left unconnected when using standard
backplanes or cards.
Table 2-18D. AT Expansion Bus Connector, D0-D19 (J10)
PIN SIGNAL NAME FUNCTION IN/OUT
D0 GND (*) Ground ---
D1 -MEMCS16 16-bit mem access in
D2 -IOCS16 16-bit I/O access in
D3 IRQ10 Interrupt Request 10 in
D4 IRQ11 Interrupt Request 11 in
D5 IRQ12 Interrupt Request 12 in
D6 IRQ13 Interrupt Request 13 in
D7 IRQ14 Interrupt Request 14 in
D8 -DACK0 DMA Acknowledge 0 out
D9 DRQ0 DMA Request 0 in
D10 -DACK5 DMA Acknowledge 5 out
D11 DRQ5 DMA Request 5 in
D12 -DACK6 DMA Acknowledge 6 out
D13 DRQ6 DMA Request 6 in
D14 -DACK7 DMA Acknowledge 7 out
D15 DRQ7 DMA Request 7 in
D16 +5V +5 volts power ---
D17 -MASTER Bus master assert in
D18 GND Ground ---
D19 GND (*) Ground ---
(*) Note: D1 – D18 are the standard AT bus edgecard
connector signals; D0 & D19 are extra grounds, and
can be left unconnected when using standard
backplanes or cards.