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Could the Z80 do interference-free video as the 6502 could?

To add to the Spectrum answer: the transparent video access was used in Spectrum 128, not just the clones. Not that it matters. Indeed the method used required memory access time of 1 clock cycle. But ...
AlexFreed's user avatar
3 votes
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What was the 6502's reset behaviour when the RDY pin was low

From the "MCS6500 Microcomputer Family Hardware Manual (January 1976)" (p. 37) The RDY input delays execution of any cycle during which the RDY line is pulled low. This line should change ...
masswerk's user avatar
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Could the Z80 do interference-free video as the 6502 could?

The Amstrad CPC range of Z80 machines 'solved' this problem by interleaving RAM reads by the video gate array with Z80 read and writes. As some Z80 M-states last 3 clock cycles, and some last 4 clock ...
Mark Williams's user avatar

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