W83787IF Datasheet, PDF (119/123 Pages) Winbond – WINBOND I/O WITH SERIAL-INFRARED SUPPORT

CR26
This register is used to select DMA resources for the FDC (bits 7 - 4) and the parallel port (bits 3 - 0). Any unselected
DMA is in tristate. The default value is 23H.
bit 7- bit4, bit 3 - bit 0 DMA selected
0000
None
0001
DMA_A
0010
DMA_B
0011
DMA_C
CR27
This register is used to select IRQ resources for the FDC (bits 7 - 4) and the parallel port (bits 3 - 0). Any unselected IRQ is
in tristate. The default value is 67H.
bit 7- bit4, bit 3 - bit 0 IRQ selected
0000
None
0001
IRQ_A
0010
IRQ_B
0011
IRQ_C
0100
IRQ_D
0101
IRQ_E
0110
IRQ_F
0111
IRQ_G
1000
IRQ_H
CR28
This register is used to select IRQ resources for the UART A (bits 7 - 4) and the UART B (bits 3 - 0). Any unselected IRQ
is in tristate. The default value is 43H.
CR29
This register is used to select IRQ resources for the IRQIN A (bits 3 - 0). Bits 7 - 4 are reserved and return zero when read.
Any unselected IRQ is in tristate. The default value is 02H
877/787I APN 3
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