Adaptec 1542B User Manual - Page 7

Section Two Preparation and Configuration DMA Channel Select bit 0 DMA Channel Select blt 1 J5 DMA CHANNEL JUMPERS PIN-PAIR 7 8 0 0 X 0 0 X X X DMA CHANNEL 7 6 5* 0 J5 0 0 0 0 0 0 0 x 0 x 0 0 0 0 0 0 0 0 0 0 x 0 x 0 0 0 N. co C E-L as x = Jumper Installed = Default DREQ Channel 0 DREQ Channel 5 DACK Channel 0 DACK Channel 5 cD TCD CC cci ccS -5( 8- O w Ow cc O otr CD N- ZcCCa wCC f( ) 0 0 < < 0 0 Ox 000 x 0000x 000 J9 Ox 000 x 000 0 x 000 a- x = Jumper Installed DREQ 0, 5, 6, 7 - connects the DMA request line to the AT bus. One of these four lines must be connected in order for the board to function. The jumper installed must match the DMA channel setting in J5. DACK 0, 5, 6, 7 - connects the DMA acknowledge line to the AT bus. One of these four lines must be connected in order for the board to function. The jumper installed must match the DMA channel setting in J5. AI-IA-15409/1542B 2-6 adaptec