A dual channel asynchronous serial module designed for RCBus
Designed by Stephen C Cousins in United Kingdom
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This module conforms to the RCBus specification v1.0 for RCBus-2014 and RCBus-Z80. SC716 is a dual channel asynchronous serial module. It includes its own oscillator so that the baud rate is independ…
Read More…This module conforms to the RCBus specification v1.0 for RCBus-2014 and RCBus-Z80.
SC716 is a dual channel asynchronous serial module. It includes its own oscillator so that the baud rate is independent of the processor speed.
The module is compatible with Z80 mode 1 and mode 2 interrupts. Mode 2 is supported by an interrupt priority daisy-chain (IEI and IEO signals)
The device address is configurable with jumpers. It also has jumpers to allow various serial signals to be connected to the bus RX, TX, RX2 and TX2 signals. This allows serial terminal modules, or other serial devices, to be connected to SC716 via dedicated pins on the RCBus.
Jumpers allow serial port devices to be powered from the module or the retro computer to be powered from either serial port.
When the baud rate is generated from the onboard clock oscillator, the baud rate is usually 115200 baud. The data format is typically 8 data bits, no parity, 1 stop bit. Alternatively, the serial clock can be provided by the bus CLK2 signal.
The documentation can be found at www.smallcomputercentral.com
This module conforms to the RCBus specification v1.0 for RCBus-2014 and RCBus-Z80.
It functions with 40-pin backplanes but does not have access to the second clock as an alternative baud rate source. It also does not have access to output serial signals to the second pair of TX and RX pins. An RCBus-Z80 compliant backplane is required to create an IEI/IEO interrupt daisy-chain on the backplane rather than wires between modules.
The RCBus specification includes RCBus-2014 (both RC2014 standard 40-pin bus and RC2014 enhanced 60-pin bus) and also the full 80-pin RCBus. The 80-pin RCBus provides support for advanced Z80 features, such as the interrupt daisy-chain, as well as support for other processor families.
This kit includes all the components needed to make the module, as shown in the first picture. Other modules and backplanes shown in the pictures are not included. You will require tools, solder, and cleaning materials to assemble this kit.
The printed circuit board is available on its own here.
If you are looking for a complete system the following products might be appropriate.
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David | Sept. 28, 2023
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