V9938 programmers' guide

Please propose right and complete explanation of the registers 13, 8 and 12.

If I will write software which manages mouse and light pen through VDP, will we consider than MSX now supports pen and mouse through VDP? It is for sure that machines based on V9958 do not support these devices because these pins are simply removed. In V9938 they are still present...

Great work, it's the best MSX VDP reference I've seen so far.

Not sure if it was already pointed out, but on page 60, the table with addresses is with the final 2 addresses wrong: it is 27134 and 27135, should be 54270 and 54271, as 256x192 = 54272.

Probably copied from the table from page 48, which uses half the bits per pixel (4 instead of 8), leading to half the memory space.

I mean 256x212 = 54272

Functions codes also have errors.

There is an error also on page 56, it says that gor G6 the R#2 seeting of A16 is bit 7 = 0, bit 6 = A16 and bits 5 to 0 = 1, where the Yamaha documentation (and the real thing behavior) is bit 7 and bit 6 = 0, bit 5 = A16 and bits 4 to 0 = 1

It ends up that page 58 has an error in its title, it is saying example of VRAM allocation for GRAPHICS 4 mode, it should be GRAPHICS 6 mode

Those are the two I remember finding...