SpritesMind.Net

Awesome work, dude!
This is very interesting information!
I guessed a lot about it, but many was unique
Thank you so much for such hard work!

After all i connect sega-cd to my amstrad mega-pc.

proof: https://youtu.be/X6q1VmEBfr8

I buy my mega-pc on ebay in very bad condition.
After repair and some upgrades it work fine with sega-cd :)
repair :
dead system controller 76c010
dead and leaked battery
removed recaped capactors
dead VIA pads ...

Bios from Shane (MODEL3.BIN) is 512kb and dated 06/04/91. In file only last 128kb is needed. I pub it here : http://piroxilin.narod.ru/sega/teradrive/model3-128k.bin .
Bios from my teradrive dated 03/22/91 and have a difference. http://piroxilin.narod.ru/sega/teradrive/bios-27c010.bin

Teradrive ...

Yay!!

I read it it via an adapter qfp44-dip42. http://piroxilin.narod.ru/sega/teradrive/16bit_adapter_2_27c800.jpg
U38 (HN62414) contained ROMDISK!
ROMDISK DUMP : http://piroxilin.narod.ru/sega/teradrive/tru-27c800.bin
Chip HN62414 (512k*16bit) sheet : http://piroxilin.narod.ru/sega/teradrive ...

On the board, there is one more ROM - "HN 62414".
-del-
But remains a mystery which contains "ROMDISK"?
All files with the "PC-DOS" occupy 150KB, and even zipped - 80k.
And they are definitely not in the main BIOS.
Now I'm looking for an option how to read the mask ROM (16*512k) ...

BIOS of teradrive : http://piroxilin.narod.ru/sega/teradrive/bios-27c010.bin
Connections between VRAM and VDP : http://piroxilin.narod.ru/sega/teradrive/vram0-3.jpg
Pics of "NEW" signals of VDP to 2-nd VRAM bank : http://piroxilin.narod.ru/sega/teradrive/vdp-vram.jpg
Pinout of Slots (Cart and EXT ...

I try it on :
genesis1 (1601) - full version run without any glitches.
md1 (HAA-2510) (jap) - full version run without any glitches.
jvc x`eye (rg-m10bu) - full ver. dont run, p1 & p2 run without any glitches.
genesis 3 (mk-1461) - full ver. dont run, p1 & p2 run without any glitches.

Sound ...

Stef wrote:... I should ask Krizz some details about the 10 MB support in the Mega Everdrive.

About UMK3 hack (8MB) : it run unstable - i got BSOD before death scene ingame.

I used next MD1:
Mega Drive 1 - "High definition graphics. Stereo sound"
Model № 1600-09 (PAL)
PCB: ic bd m5 pal va4
She got RGB video output only.

4Mb version work without bugs.

I posted new video, writed on SMD1 HD with Mega everdrive.
http://www.youtube.com/watch?v=_xHnegl-Mm4
Sound have a lot of glitches. I had restarting playback some times to catch moment of begining of "bug". Some time video played without distortion from begining to end.
I tryed to run with attached ...