it doesn't seem to be supported anymore, several games exist
especially the Return to Holy Tower is a great game
https://www.zxuno.com/ht2/
here are some screens:
https://zxfiles.samcoupe.cz/download/mb03/RADASHOW.TAP
![Image](https://i.postimg.cc/zV0bFYY9/radashow.png)
10 REM activate radastanian mode
20 OUT 64571,64: OUT 64827,3
30 REM Load screen and palette (6144 + 16 bytes)
40 LOAD "" CODE 16384
50 REM set palette
60 FOR p = 0 TO 15: OUT 48955, p: OUT 65339, PEEK(p + 22528): NEXT p
70 PAUSE 0
80 REM deactivate radastanian mode
90 OUT 64571,64: OUT 64827,0
Radastan Mode is available on: ZX-Uno family (ZXDOS+ etc.), SpecNext, MB03+ interface, ZX eLeMeNt
More demos and support available?