[[RS232 ]] Interface for the CPC by [[Schneider]]. Schneider is the german German distributor for Amstrad CPC hardware (however, this interface seems to be was Schneider's own invention, not an [[Amstrad]] product).
== Clones ==
The original [[Schneider RS232 Interface]] was released around 1985. Two years later, in 1987, a software-compatible clone was released as DIY schematic in a german German book ([[Maschinenspracheprogramme und Hardware-Erweiterungen für Schneider CPC's|link]]). Even later, around 1996, a copy of that DIY schematic also circulated in the internet ([[Tim Riemann's RS232 interface|link]]). The DIY port address, timings and handshake signals are exactly the same as in the original Schneider version - except that DCD (Data Carrier Detect) isn't implemented in the DIY version.
== Pictures ==
Image:Schneider-sio-lead.jpg|Expansion Port Cable
Image:Schneider-sio-psu.jpg|Power Supply
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<gallery caption="Schneider RS232 interface 300dpi scans by Robcfg">
Image:Schneider_RS232_Unit.jpg|Interface
Image:Schneider_RS232_Unit_Bottom.jpg|Front Plate
Image:Schneider_RS232_PCB_Top.jpg|PCB Top
Image:Schneider_RS232_PCB_Bottom.jpg|PCB Bottom
</gallery>
* ASM example (for the DIY version) is included with [[Tim Riemann's RS232 interface]]
== Manual (germanGerman) ==
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The uncommon shape of the housing dates back to a Schneider BTX modul (which was being intended to be plugged into Schneider Television Sets). Apparently Schneider produced too many housings, and re-used them for the RS232 interface. Actually, a RS232 interface is very much the same as a BTX interface (the actual BTX modem must be rented separately from Deutsche Bundespost), so even the PCB may be (almost/exactly?) the same for both devices.
== Reviews ==
A review appeared in German magazine [[CPC Schneider International]] (issue 12-1985, pages [[Media:Schneider International 8512-p038 - Schneider RS232.jpg|38]], [[Media:Schneider International 8512-p039 - Schneider RS232.jpg|39]]).
== Datasheet ==
* A [[Media:Mostek_3801_Data.pdf|"Z80 STI"]] is a 40pin [[Media:Mostek_3801_Data.pdf|MK3801]] chip from Mostek. Details on that chip are from the "MOSTEK 1982/1983 Microelectronic Data Book" (kindly made available by John Robertson).
[[Category:Hardware]] [[Category:Peripherals]] [[Category:Serial_interfaces]]