FabiaTech Corporation
53
DMA Channel Map
The equivalent of two 8237A DMA controllers is implemented in the FX5403 board.
Each controller is a four-channel DMA device that will generate the memory
addresses and control signals necessary to transfer information directly between a
peripheral device and memory. This allows high speeding information transfer with less
CPU intervention. The two DMA controllers are internally cascaded to provide four
DMA channels for transfers to 8-bit peripherals (DMA1) and three channels for
transfers to 16-bit peripherals (DMA2). DMA2 channel 0 provides the cascade
interconnection between the two DMA devices, thereby maintaining IBM PC/AT
compatibility.
The following is the system information of DMA channels:
DMA Controller 1
DMA Controller 2
Channel 0: Spare
Channel 4: Cascade for
controller 1
Channel 1: Reserved for
IBM SDLC
Channel 5: Spare
Channel 2: Diskette
adapter
Channel 6: Spare
Channel 3: Spare
Channel 7: Spare
Summary of Contents for Fanless Series FX5403
Page 6: ...vi Appendix 59 Dimension 59 ...
Page 7: ...vii ...
Page 10: ...FabiaTech Corporation 3 Layout 1 2 Antenna 4 2 3 1 DC12 24V ON OFF ...
Page 13: ...FabiaTech Corporation 6 ...
Page 23: ...FabiaTech Corporation 16 ...
Page 51: ...FabiaTech Corporation 44 ...