Kontroler DMA 8237

Dariusz Chaberski

§ Block Diagram

2

§ System Interface

3

§ Cascaded 8237s

4

§ Rotating Priority

5

§ Internal Registers

6

§ Command Register

7

§ Mode Register

8

§ Request Register

9

§ Mask Register

10

§ Status Register

11

§ Definition of Register Codes

12

§ Software Command Codes

13

§ Word Count and Address Register Command Codes

14

§ Transfer

15

§ Memory-to-Memory Transfer

16

§ Compressed Transfer

17