VRCVII / VRC7 Sound Registers

[sdm]

http://kevtris.org/nes/vrcvii.txt

I have problem with VRC7 sound registers,
kevtris write:

All sound registers are accessed through only two physical registers.
9010:
-----
This is the index register. You write the desired register number here.
9030:
-----
This is the data register. Data written here is stored in the register
pointed to by the above index register.

ok... but

00h - 07h : Custom instrument registers -> This mean $9000-$9007 ?????

10h - 15h : ffffffff -> mean $9010 - $9015 ???

30h - 35h : iiiivvvv -> $9030-$9035 ???

I can't understand this

[Dwedit]

Should be simple enough. You set the index, then writes to the data port go to whatever you set the index to.

[d4s]

00h - 07h : Custom instrument registers -> This mean $9000-$9007 ?????

10h - 15h : ffffffff -> mean $9010 - $9015 ???

30h - 35h : iiiivvvv -> $9030-$9035 ???

No, you got it wrong.

This is how you do it, at least according to Kevtris' description:

lda #$07
sta $9010
lda #$AA
sta $9030

writes $AA to register $07.

[sdm]

ok. thanks