This is a rather bizarre [[8bit Printer Ports|8bit Printer Port]] solution. Aside from the 8th data bit, it doesn't come up with any other extras: Data is only one-directional, and only Strobe and Busy control signals are implemented.
Compared with the much older single-wire [[Happy Computer 8bit Printer Mod]] (1985), the Amstrad Action approach is terribly overcomplicated. And aside from Another downside is that it the external circuit isn't even backwards compatible with normal the 7bit printer software.
== Technical ==
Connects to the expansion port. Uses six TTL chips (74HC133, 74LS138, 74LS273, 74LS241, 74LS02, 74121), 4 resistors, 1 capacitor, plus some connectors.
Port Bits Expl.
FBF8h N/A Strobe (W)
File:8bitPrinterAmstradActionIssue38page57.jpg
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[[Category:Printers and printer ports]] [[Category:DIY]]