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Results tagged with z80
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user 4335
The Zilog Z80 microprocessor. Prefer [game-boy] instead for questions about the Game Boy CPU nicknamed the ‘GBZ80’.
10
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4
answers
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How do Z80 Block Transfer instructions work?
What were these Z80 (or maybe even 8080) instructions, how do they work, and how do they compare with the 6309 abilities? … Maybe crusty CoCo users should be hammering a Z80 into their machines instead... :) …
- 61.5k
27
votes
2
answers
5k
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How did Z80 multiprocessing work in the Namco Galaga hardware?
It had amazing, fast, smooth 2D-sprite graphics, and relied on Namco hardware that utilized 3 Z80 CPUs running at ~3 MHz. … I'm mostly interested in how the Z80 for graphics processing was utilized to manage the drawing of all the sprites. …
- 61.5k
12
votes
4
answers
3k
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Accelerators for Z80 micros?
I have not heard of any after-market, plugin accelerators for the popular Z80 micros of the era, like the ZX Spectrum, MSX, or TRS-80. … Did any such accelerator products exist, based on either a higher clocked Z80 or a Z8000? If not, is there an obvious technical or marketplace reason for this? …
- 61.5k
24
votes
6
answers
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Why did the Z80 with 4-bit ALU out-perform the fully 8-bit Intel 8080?
Looking at the development and architecture of the Z80, it appears to be a scaled-down, cost-reduced (in terms of total system cost), clone of the Intel 8080. It only used a 4-bit ALU. … However, the Z80 out performed the Intel version and nearly displaced it completely in the CP/M market. How did Zilog design their ALU to both out-perform and save cost? …
- 61.5k