Figure 20. transfer/search one byte, Figure 20 – Zilog Z08470 User Manual
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Direct Memory Access
Figure 20.
Transfer/Search One Byte
Byte
Match
?
Write Data
to Destination Port
Increment/Decrement
Destination Port Address
Read
Source-Port Data
YES
Increment
Byte Counter
Set
Status Flag
• Continue
• Release Bus
• Interrupt
Increment/Decrement
Source-Port Address
NO