Clip Window Control Register

Number	TBRegisterNumber::$1C
Readable	TBRegisterReadable::Yes
Writable	TBRegisterWritable::Yes
Short Description	ShortDesc::Controls (resets) the clip-window registers indices.

Bit	Function
7-3	Reserved, must be 0
2	reset the ULA/LoRes clip-window register index (by writing 1).
1	reset the Sprite clip-window register index (by writing 1).
0	reset the Layer 2 clip-window register index (by writing 1).

Ped7g comment: it's a bit unclear what interesting info may be gained by reading this register (seems a bit useless to me). I posted question in forum and I will update the text if I will get explanation.