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AMX Mouse: Difference between revisions
From Sinclair Wiki
→PCB layout
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=== PCB layout === | === PCB layout === | ||
PCB layout is a relatively simple double-layer PCB that sits flat behind the ZX Edge connector. | |||
[[File:Xray-AMX.jpg]] | [[File:Xray-AMX.jpg]] | ||
The four resistors are all 1K for the button pullups and 10K for the Strobe pullup. The diodes are small signal diodes, likely 1N4148 | |||
Decoding uses A5, A6 and A7, and decoding for the z80 PIO is performed by the PIO itself as it has a chip enable and IORQ pin, however despite free inputs on the PIO, the Mouse Buttons are decoded separately and their output put onto the data lines via the diodes. | |||
== External links == | == External links == | ||
