Videopacs in Odyssey^2?

[Ransom]

How well (if at all) do European Videopacs work in the Odyssey²?

[BassGuitari]

I'd be surprised if they worked at all, since they're PAL.

 

Brazilian games should work, though.

[Ransom]

I figured they wouldn't play, but then I saw some mention on a .nl message board that seemed to indicate that O2 games could be played in G7000 systems. It got me wondering if it was possible, or if I was misunderstanding something.

 

Thanks for the clarification.

[Seob]

most games work perfetcly fine, except frogger, backgammon, most prototypes, and maybe two or three more which don't work or have glitches.

 

At least these games don't work on Odyssey2 consoles:

 

Videopac: 16, 21, 31, 40, 47, 48, 57, 58, Chess (C7010)

Parker: Frogger

Jopac: Syracuse, Chez Maxime, Exojet, Le Tresor Englouti

proto's: Shark Hunter, Interpol, Tutankham

 

and of course the Plus-only games: Videopac 56, 59, 60, Basic (C7420), Motocrash (Jopac), Flashpoint.

 

There are some other games which don't work, but they have an Odyssey2 equivalent: Videopac 15 (Dynasty), Videopac 33 (Acrobats).

 

Some games which have not been released in the U.S. do have a brazilian version, which do work on Odyssey2 consoles: Videopac 16, 21, 47, 58, Frogger.

 

Games with extra hardware inside the cart will never work through The Voice module:

Videopac 31, 40, 55, 58, 59, 60, C7010, C7420.

 

Tech specs

G7000:

- crystal oscillator: 17.734476 MHz

- 8048: 5.911492 MHz

- VDC: 3.546895 MHz

- PAL encoder: 4.433619 MHz

 

The G7000 has one master clock, the other frequencies are obtained by dividers.

The G7400 doesn't have a master clock.

 

G7400:

- 8048: 5.911 MHz

- PAL encoder: 8.867 MHz (internally divided by 2)

- VDC: 3.547 MHz (derived from PAL encoder)

 

Odyssey2:

- crystal oscillator: 7.15909 MHz

- VDC and NTSC encoder: 3.5795 MHz

- 8048: 5.369 MHz

 

G7200:

8048: 5.911 MHz

VDC: 3.547 MHz (separate oscillator)

 

C52 and N60:

- crystal oscillator: 17.812 MHz

- 8048: 5.937 MHz

- VDC: 3.562 MHz

 

Jopac and french G7400:

- 8048: 5.911 MHz

- VDC: 3.5625 MHz

 

both the Odyssey2 and the G7000 have one master clock (crystal oscillator). The clock inputs of the 8048 and the VDC are derived from this oscillator.

 

G7000: for the 8048 the clock is divided by 3, for the VDC it's divided by 5. Inside the 8048 the clock is divided by 15 to get the "instruction cycle clock", so the total is 45 (3 * 15). So the VDC draws exactly 9 pixels during one 8048 cycle (45 / 5).

 

Odyssey2: for the 8048 the master clock is divided by 1.333 (4/3), so the total for the "instruction cycle clock" is 20 (4/3 * 15). For the VDC the clock is divided by two, so it draws exactly 10 pixels during one 8048 cycle (20 / 2).

 

Most info from Rene_G7400 who is a master within the odyssey2/videopac scene.

Edited January 20, 2011 by Seob

[Ransom]

Wow! So it is possible for some of them. Thank you!

[BassGuitari]

That is news to me, also.

 

Learn something new every day...

[Metal Ghost]

most games work perfetcly fine, except frogger, backgammon, most prototypes, and maybe two or three more which don't work or have glitches.

 

At least these games don't work on Odyssey2 consoles:

 

Videopac: 16, 21, 31, 40, 47, 48, 57, 58, Chess (C7010)

Parker: Frogger

Jopac: Syracuse, Chez Maxime, Exojet, Le Tresor Englouti

 

 

Am I misunderstanding something here....was there a game called Syracuse? Ha....if there is I may have to try and find a copy, even though I don't even have an Odyssey! Though considering the Orangmen's performance yesterday against Villanova, maybe not

[Seob]

Yes France release only: http://www.videopac.nl/games/jopac/syracuse/vpac_main.php

http://www.bermuda.ch/balduin/videopac/syracuse.pdf

Edited January 23, 2011 by Seob