It managed "contention," pausing the Z80 CPU when both needed access to the same bank of RAM.
It divided a 14 MHz master clock down to 3.5 MHz for the Z80 CPU. How to Design Your Own Retro Microcomputer It managed "contention," pausing the Z80 CPU when
It scanned the rubber membrane keyboard and managed audio input/output for cassette tapes. It managed "contention
It handled pixel and attribute (color) data from memory to generate a PAL video signal. It managed "contention," pausing the Z80 CPU when
In the early 1980s, Richard Altwasser and the Sinclair team faced a challenge: build a color computer for under £100. Their solution was the Ferranti ULA, a "gate array" precursor to modern FPGAs. The ULA performed four critical roles:
It managed "contention," pausing the Z80 CPU when both needed access to the same bank of RAM.
It divided a 14 MHz master clock down to 3.5 MHz for the Z80 CPU. How to Design Your Own Retro Microcomputer
It scanned the rubber membrane keyboard and managed audio input/output for cassette tapes.
It handled pixel and attribute (color) data from memory to generate a PAL video signal.
In the early 1980s, Richard Altwasser and the Sinclair team faced a challenge: build a color computer for under £100. Their solution was the Ferranti ULA, a "gate array" precursor to modern FPGAs. The ULA performed four critical roles: