Ampro Corporation 700 manual DRQ0, DACK5, DRQ5, DACK6, DRQ6, DACK7, DRQ7, Master

Chapter 3				Hardware
	30	(D9)	DRQ0	DMA Request 0 – Used by I/O resources to request DMA service.
				Must be held high until associated DACK0 line is active.
	31	(D10)	DACK5*	DMA Acknowledge 5 – Used by DMA controller to select the I/O
				resource requesting the bus, or to request ownership of the bus as a bus
				master device. Can also be used by the ISA bus master to gain control
				of the bus from the DMA controller.
	32	(D11)	DRQ5	DMA Request 5 – Used by I/O resources to request DMA service.
				Must be held high until associated DACK5 line is active.
	33	(D12)	DACK6*	DMA Acknowledge 6 – Used by DMA controller to select the I/O
				resource requesting the bus, or to request ownership of the bus as a bus
				master device. Can also be used by the ISA bus master to gain control
				of the bus from the DMA controller.
	34	(D13)	DRQ6	DMA Request 6 – Used by I/O resources to request DMA service.
				Must be held high until associated DACK6 line is active.
	35	(D14)	DACK7*	DMA Acknowledge 7 – Used by DMA controller to select the I/O
				resource requesting the bus, or to request ownership of the bus as a bus
				master device. Can also be used by the ISA bus master to gain control
				of the bus from the DMA controller.
	36	(D15)	DRQ7	DMA Request 7 – Used by I/O resources to request DMA service.
				Must be held high until associated DACK7 line is active.
	37	(D16)	+5V	+5 volt power ±10%
	38	(D17)	MASTER*	Bus Master Assert – This signal is used by an ISA board along with a
				DRQ line to gain ownership of the ISA bus. Upon receiving a -DACK
				a device can pull -MASTER low which will allow it to control the
				system address, data, and control lines. After -MASTER is low, the
				device should wait one CLK period before driving the address and data
				lines, and two clock periods before issuing a read or write command.
	39	(D18)	GND	Ground
	40	(D19)	GND	Ground

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

32 Reference Manual ReadyBoard 700