trdos for spectrum 128 /+2

[VELESOFT]

На +2, вроде бы своя дисковая система (отличная от tr-dos)?!
В оригинальном интерфейсе это адреса в диапазоне 15360-15615.

Original BETADISK 48 is designed only for ZX macines with 48 rom and connect trdos rom in area #3C00-#3CFF. This interface is not popular and software support is 0%.

For ZX 128 models exist BETADISK 128 (also original, only better) interface. This is compatible(identical) with russian BDI in ZX clones. TRDOS is enabled only if 48 rom is connect. And map area is #3D00-#3DFF (russian betadisc clones use same adress range). Old TRDOS roms (5.03 etc..) contain at adress #3C00-3CFF also old code for backward compatibility with betadisc 128.

Exist also Czech BDI 128 clones with switch 48/128 (select adress range #3Cxx or #3Dxx):
http://velesoft.speccy.cz/prodej/prodej.htm