Simtec MS70: reading, writing;
Simtec MS71 (Z18XE and Z22XE): reading, writing;
Simtec MS71 (Y22XE): only writing; 
Simtec MS71.5: reading, writing;
Simtec МS71.6: reading, writing;
Simtec МS81: reading, writing;
Simtec МS75.1: reading, writing;
Simtec МS75.5: reading, writing.