Zilog Z08470 - Manual (Page 193)

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UM008101-0601 Direct Memory Access
Read Register Bit Functions
Figure 83. Read Register 0 through 6 Bit Functions
D7 D6 D5 D4 D3 D2 D1 D0
Status Byte X X
1 = DMA Operation has Occurred
0 = Ready Active
0 = Interrupt Pending
0 = Match Found
0 = End-of-Block
Byte Counter (Low Byte)
Read Register 1
Byte Counter (High Byte)
Read Register 2
Port A Address Counter (Low Byte)
Read Register 3
Port A Address Counter (High Byte)
Read Register 4
Port B Address Counter (Low Byte)
Read Register 5
Port B Address Counter (High Byte)
Read Register 6