S plus on s2000 enhanced ss chip error

[Mirage_Chaser]

I am trying to put a S plus game on my s2000 enhanced board. I copied my slow chip onto a new m27c512 and copied and pasted the code so that it would be 512k but the machine still has a ss chip error.

Any help would be appreciated.

[CVslots]

I don't believe you can use a chip burnt with an offset in an S2000. S+ you can, but not in an S2000. This was talked about on the old site I know. You don't have any 27C64 chips that are -10 or faster? We've gotten by with a -12 (and I believe even a -15 in a pinch, although it's not recommended) on very simple games (single line with just a wild, no Double or Triples).

[cowboygames]

Are you not able to get S2000 software for your game theme?

[RB]

In my experiences you can use a chip with an offset in a S2000. It should work either way. The problem is likely the speed of the chip. It should be 120ns or faster. Can burn it on a 64k, 128, 256 or 512 with or without offset. In a S plus you must fill the chip if you are using larger than 64k. I am fortunate enough to have some M27C64-120 chips that I can burn the file to one time & work for either S2k or S plus with 10 or 16 mhz boards.

[foster]

Chips must be -12 (120ns or faster)
No offset in an S2000
Only put the data in 0000-1FFF no need to copy it 8 tines

Chip must be placed at the bottom of the socket, like you do when programming it.
Pins 1,2,31,32 of socket are empty.

[Mirage_Chaser]

Ok. I have it in the right place but I'll try it with no offset.

The chips I have are all 200ns. Nothing faster that is not 512.

[RB]

 
120ns or faster.

[Mirage_Chaser]

Sorry to not be more clear RB. I was responding to an earlier post. The reason I did not use a m27c64 chip is because all of mine are 200ns response or worse. That is why I am trying to use a 512. I am going to give it a try with no offset now.

[Mirage_Chaser]

Offset or no offset there is no difference.

I did this once before though and I was successful. I used the same chip a ST M27C512 and did do an offset and the game is working. I put it in this new machine and it works but I cannot seem to get it to work with this game.

Any ideas?

Also just for kicks I tried the unaltered ss chip and it comes up with the same ss eprom error.

[cowboygames]

Maybe I'm confused because this is an enhanced board, but do you still need to use an SB1000 in the SB chip socket on the legacy adapter like the setup used on a 500 series board? And if so, do you have one in there?

[Mirage_Chaser]

I don't know what you mean by legacy adapter...

But yes to get this to work I am using the SB001000 base chip. And it does work like that, just not with the latest game I am trying to do.

[Buzz]

Do a off set but use a 27C256 with a speed of 120ns or faster  Copy and paste 4 times

[Mirage_Chaser]

Ok I figured something out. The times I have been able to get this to work the s+ chips were 8k and I was offsetting them to 64k. The work and I can get them to work in the machine I am having problems with, however the game I am trying to do now does not work, offset or no offset.

The original data that I am getting from the chip populates from 000000-0000FFFF. Maybe it its self is a copy I am not sure. But try as I might I cannot get this game to work.

[foster]

DO NOT use any offset when programming a 27C256 or 512 for a S2000 and only put the code in one time.

I came across this in 2007 and figured out no offset and the speed of the chips must be rated for 120ns or faster
The chip I was using was a 27C512 programmed with the offset of C000 for S+ and it was fast enough, It never worked.
As soon as I made a chip with the data starting at 0000 it worked just fine.

Also I have never had a S2000 ruin a  EPROM that was put in backwards, do not try doing it with a S+ you will ruin the SP or SS chip as soon as you apply power. 

Look at the data sheets between a 512, 256 and 64 chip and you will see why the S+ needs the offset and the S2000 does not.

Here are the 2 pins that cause the 27C512 in a S+ to need an offset when programmed for a SS chip

Pin  27c64 27c512
1     Vpp    A15
27    Prog   A14
       
Pin 27 is active when at logic 0 or 0V - the S+ most likely has these pins tied to Vcc for logic 1. which would explain the need for an offset in a S+ and not needed in the S2000.

[Mirage_Chaser]

That is great info and thanks! Here is the problem, I tried it with no added offset and it still didn't work. The s+ chip I have looks like a remake. It does not work in the game, and it doesn't work with a new chip that I know works because if I use one of the games that I have done before on this chip it works no problem. So the chip I am trying to copy to works.

Perhaps the original file is already offset and that is why it works in the s+ and not in an s2000 but I cant tell. The data starts at 0000000 and is a 64k file.

We are talking about a red white and blue s+ theme.

[foster]

Use HxD to extract the 8k of data from C000-DFFF and save to a new file.

When you open the file look at line DF30 it should look like:
".S+..####.IGT...."
the #### would be the SS number in readable form.

When you make the new file that line will be at 1F30.

Which Red White and Blue Theme
FYI There are Base chips available for some if not all Red White and Blue themes.

[Retro tech repair]

Are you sure your ss chips is an ss not an st(st being tournament software not st the chip manufacturer).

[Retro tech repair]

Here are the 2 pins that cause the 27C512 in a S+ to need an offset when programmed for a SS chip

Pin  27c64 27c512
1     Vpp    A15
27    Prog   A14
       
Pin 27 is active when at logic 0 or 0V - the S+ most likely has these pins tied to Vcc for logic 1. which would explain the need for an offset in a S+ and not needed in the S2000.

on a 27c64 pin 27 is program enable if it is active low you would want it high while reading. on a lot of eproms a14 and a15 can be used for something called bank switching when one of these pins is connected to vcc (normally through a 4.7k or 10k resistor) it makes the eprom change its offset.