Hi!

I used all of my sparetime last night turning my appartment upside-down... I 
went to bed at 4 in the night without finding the schemes.. Bummer!
But this morning at last, I found the 2+ description, and the clock-chip 
upgrades.
The 2+ upgrade only has a small description. But the 738 must have all the 
msx2 upgrades first, and the most is already done there.

This is the MSX2 upgrade:

replace the vram

remove diskrom and basic rom

disconnect ic51, pin one on the backside of the print

Disconnect IC45 pin 13 --> ic35 pin 40
Disconnect IC63 pin 14
------------------------------------------
Connect IC 35 pin 40 -> ic 44 pin 9
Connect IC 63 pin 10 -> ic 44 pin 10
Connect IC 45 pin 13 -> ic 44 pin 8
Connect IC 63 pin 14 -> ic 63 pin 8
Connect IC 51 pin  1 -> ic 35 pin 40
------------------------------------------
Insert eprom

Gilvad writes about the msx2+ upgrade

- Insert the 2+ Eprom in socket for IC 51
- Disconnect IC51 pin  1 from the print
- IC51 pin 1 --> IC44 pin 10 --> IC35 pin 40
- IC44 pin 9 --> IC63 pin  6
- IC44 pin 8 --> IC45 pin 13
- Disconnect IC45 pin 13 from the print

The paper also has this info from Tor Spigseth:

- IC37 pin  4 --> Ground
- IC37 pin 27 --> Ground
- IC37 pin 21 --> +5V
- IC37 pin 58 --> +5V

IC37 is ofcourse the VDP


I hope this is all! I`ll check with my own 2+.

Dan Derpaux