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EBC-3410
BCM Advanced Research
6-113
DMA-channel Usage
The DMA circuitry incorporates the functionality of two 8237 DMA controllers with seven
programmable channels. The controllers are referenced DMA Controller 1 for channels 0-3
and DMA Controller 2 for channels 4-7. Channel 4 is by default used to cascade the two
controllers.
Channels 0-3 are hardwired to 8-bit count-by-bytes transfers and channels 5-7 to 16-bit
count-by-bytes transfers.
The onboard CS5530A provides 24-bit addressing with the 16 least significant bits [15:0] in
the Current register and the most significant bits [24:16] in the Page register.
DMA-channel
Description
Note
DMA0
Available in PC/104 interface
DMA1
XpressAUDIO 16-bit sound
DMA2 Floppy
disk
controller
1
DMA3
Parallel port, if using ECP mode
1
DMA4
Used for cascading
DMA5
XpressAUDIO 16-bit sound
DMA6
Available for PC/104 interface
DMA7
Available for PC/104 interface
Note:
The usage of these DMA-channels depends on the choices made in the BCM setup
screen. The DMA-channels are fully usable for PC/104 interface if the
corresponding on-board unit is disabled in the setup screen.
Summary of Contents for EBC3410
Page 24: ...EBC 3410 BCM Advanced Research 3 23 3 4 Jumper Connector 3 4 1 Jumper Connector Layout ...
Page 37: ...User s Manual EBC 3410 User s Manual 3 36 ...
Page 63: ...User s Manual EBC 3410 User s Manual 4 62 ...
Page 109: ...User s Manual EBC 3410 User s Manual 6 108 6 Measurement Drawing ...