qlwiki:sigma_research_parallel_printer_interface [Sinclair QL Wiki]

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 ====== Sigma Research Parallel Printer Interface ======
The Sigma Research Parallel Printer Interface was a serial to parallel printer interface, which was very similar to the first version of the [[qlwiki:Miracle Centronics Interface]].


The baud rate was fixed at 9600.  There was a cable to the QL, and a second cable to the printer, with a metal centronics connector.


According to the review in QL User (December 1984), this centronics connector has a UART specifically designed for inputting serial data, and a ceramic resonator on the PCB, to give more accurate clock frequencies.  The chips were also said to be CMOS type, resulting in a very low power consumption.


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Title: **Sigma Research Parallel Printer Interface**\\ 
Interface Type: Serial to Parallel Convertor\\ 
Connection: QL Serial Port (SER1 only)\\ 
Through-Connector: No\\ 
Manufacturer: [[qlwiki:Sigma Research]]\\ 
Year First Sold: 1984\\ 
Original Price: £39\\ 
Download Manual: Unknown\\ 
Accompanying Software: None\\