Changes
The [[ECB Bus]] connector of the board is intended to be plugged into the [[Schneiderware Basisplatine]], but it could be also wired directly to the CPCs Expansion Port.
== I/O Ports ==
{|{{Prettytable|width: 700px; font-size: 2em;}}
|Address (default) || Address (alternate) || Usage
|-
|DFxxh || N/A || Schneiderware RAM/EPROM - [[Upper ROM Bank Number|Expansion ROM bank number]] (W)<br>Battery-backed SRAM and/or EPROM are selected when the bank-number matches the jumper-selected values; the memory is then mapped to C000h..FFFFh (in case of READing one must also enable upper ROM via Gate Array). The bank number decoding is a bit strange:
* EPROM/Read bank: All 8 bits decoded (bank 00h..FFh)
* SRAM/Read bank: Only lower 4 bits decoded (bank X0h..XFh)
|-
|}
'''Note''' - Port DFxxh is the standard [[Upper ROM Bank Number]] register, which is also used by [[AMSDOS]], for example. Reserved banks are 00h=Basic, and 07h=AMSDOS. Bank FFh (and XFh) can be also considred as reserved (as it's used by the "128K RAM detection" in CP/M+). Other bank numbers can be used by one (or more) Schneiderware Pseudo ROM board(s).
== Pictures ==
File:Schneiderware SRAM and EPROM Schematic.png|SRAM/EPROM Schematic
</gallery>
== Software ==
The magazine article contains three listings with examples on how to use the Pseudo ROM board, including a ROM version of the [[Schneiderware Real Time Clock]] driver.
== Scanned Article ==
* [[Media:Schneiderware 8 - Pseudo ROM.pdf|Schneiderware 8 - Pseudo ROM.pdf]] - SRAM and EPROM mapped as ROM - '''4/1987 page 26-34''', plus corrections in 5/1987 page 32-34
[[Category:Peripherals]]
