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Schneiderware Centronics Port

161 bytes added, 13:18, 30 September 2010
The [[SchneiderwareCentronics Port]] series consists of several DIY projects which have been released in is an external [[8bit Printer Ports|8bit Printer Port]], published by german magazine [[CPC Schneider International]] published by as part of their [[DMVSchneiderware]]DIY series. The name "Schneiderware" was probably choosen due to its double meaning ("CPC Hardware" in computer languageplain PCB, or "specially fitted clothing" in german language). Aside from building the hardware on one's own, one could fully assembled board were also available via mail-order printed circuit boards, either fully assembled, or plain PCBs without components.
The various boards are having special connectors, [[ECB Bus]] connector of the board is intended to be mounted on plugged into the "Basisplatine" (some kind of a motherboard with [[ECB BusSchneiderware Basisplatine]] sockets) which allows to connect up to five Schneiderware boards to the CPCs Expansion Port; with some small modifications one , but it could be also connect the boards wired directly to the CPCs Expansion Port (the motherboard is merely an Y-cable-like adaptor without electrical components, so one doesn't really need it)* [[Schneiderware Basisplatine|Schneiderware #2a Basisplatine (Motherboard)]] (7/1986 pages 60-67)
* [[Schneiderware Centronics Port|Schneiderware #2b Centronics (Printer Port)]] (7/1986 pages 60-67, plus complaints from 10/1986 page 10, port B redefined on 12/1986 page 124 and 3/1987 pages 8-9)
* [[Schneiderware Uni-PIO|Schneiderware #6 Uni-PIO (48 == I/O lines)]] (12/1986 pages 124-130, correction on 5/1987 page 12)Ports ==
Notes: The "Centronics" board Default I/O Address is yet another [[8bit Printer Ports|8bit Printer Port]] solution F8E0h-F8E3h. An alternate I/O Address is jumper select-able (intended to allow to connect two Centronics cards to the computer), the alternate address was originally defined as F8F0h-F8F3h, but different than the later [[CPCI 8bit Printer ModSchneiderware Uni-PIO|joystickSchneiderware #6 Uni-signal based onePIO]] project did accidently use that addresses, too. In result, it was released a few months earlier in the same magazinesomewhat suggested (or silently implied)to change the secondary Centronics address to F8E4h-F8E7h.  == I/O Ports ==
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Using a [[8255 PPI chip]] with 24 I/O lines is possibly the most expensive and overcomplicated 8bit Printer Port solution, especially as the circuit uses only 10 of the 24 signals (it implements on Data, Strobe, and Busy - other Centronics signals like Error, Ack, Select, etc. aren't connected).
 
'''Note''' The same magazine released a number of different [[8bit Printer Ports|8bit Printer Port]] solutions: A [[CPCI 8bit Printer Mod|joystick-signal based one]] (simple & messy), the Happy Computer [[Happy Computer 8bit Printer Mod|cassette-write based one]] (simple & elegant), and the [[Scheiderware]] one (complex & expensive).
== Pictures ==
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