The Z80 Microprocessor: Hardware, Software, Programming, and Interfacing

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Prentice-Hall, 1988 - Zilog Z-80 (Microprocessor) - 372 pages
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the description of how the border port works is a bit confusing
there is a video on youtube that clearly shows that a port write OUT can be modified to occur one tstate earlier or later - this moves
the 8 pixel ong line in the border slightly to the left or right
please do you know anyone that might help to explain this see vid;
http://www.youtube.com/watch?v=cwpn0GGCYp4
my sam coupe video with BASIC ( not from Andrew Collier though)
http://www.youtube.com/watch?v=zsjTpFR0oYQ
help im pretty sure we can squeeze 16 colours per scan line using hmpr bit 5&6
even if we have to pretend we have a DMA
mode 3
512x384 interlaced
HELP
 

Contents

Z80 ARCHITECTURE
14
DATA TRANSFER INSTRUCTIONS
35
ARITHMETIC AND LOGIC INSTRUCTIONS
56
Copyright

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