MicroMac MMXL99 SE-PL-CL

[macsonny]

Hi All,

I have picked up a MicroMac card per attached picture. Note that it apparently came from a Mac Classic but I believe it's supposed to work in a Mac SE as well. I had to purchase a new PDS slot connector and will solder in the next few days.

I of course made the assumption that if I just solder in the PDS slot connector then there are no other mods required for the card to work in my SE right?

Has anyone got the user manual/installation manual and/or drivers for this card they can share?

Thanks

macsonny

 

[macsonny]

Looks like it's called a MicroMac Performer. I managed to find the drivers but apparently just works without them.

My only concern is that the PDS connector I bought looks like it might cause the card to be too high when installed. Does anyone know if there are "low rise" PSD slots that can be purchased anywhere?

Thanks

 

[zigzagjoe]

@Bolle cloned this card. https://github.com/TheRealBolle/Performer-SE-PL-CL

There's a schematic and all. It looks like U7 is only needed if installed in a classic. Since you have it installed, you might need to remove it to use in a SE, and put in a bodge wire equivalent to Bolle's SJ2. Not sure though. It could be fine as-is.

Looking at assorted pictures of the original card, the original pds socket doesn't look particularly low profile. Look about the same as yours, best I can tell.

 

[Bolle]

You either have to remove U7 or disconnect the 16MHz signal from the PDS slot if you want to leave U7 in place.
Only adding the PDS connector is not going to work.

 

[macsonny]

@Bolle cloned this card. https://github.com/TheRealBolle/Performer-SE-PL-CL

There's a schematic and all. It looks like U7 is only needed if installed in a classic. Since you have it installed, you might need to remove it to use in a SE, and put in a bodge wire equivalent to Bolle's SJ2. Not sure though. It could be fine as-is.

Looking at assorted pictures of the original card, the original pds socket doesn't look particularly low profile. Look about the same as yours, best I can tell.

Oh wow - fantastic link. I'm very comfortable removing the U7 IC but just wanted to check I get the bodge wire correct which looks like it goes from PIN #1 of U5 to PIN #7 of U7. Is that correct?

 

[macsonny]

You either have to remove U7 or disconnect the 16MHz signal from the PDS slot if you want to leave U7 in place.
Only adding the PDS connector is not going to work.

Thanks for tip. What's easiest way to remove the 16 MHz signal?

 

[Bolle]

Oh wow - fantastic link. I'm very comfortable removing the U7 IC but just wanted to check I get the bodge wire correct which looks like it goes from PIN #1 of U5 to PIN #7 of U7. Is that correct?

No bodge wire needed at all on the original. The two options are either to remove U7 or don't connect pin A29 on the PDS connector and leave U7 on.


...remove or cut that pin from the PDS connector and you should be good.
The only purpose of U7 is to generate a 16MHz signal from the 8MHz CPU clock signal that's present on the Plus or Classic CPU socket.
The SE already has a 16MHz present on the PDS connector. If you leave U7 on you'll basically short the logicboard 16M signal to the one that's generated by U7. Removing pin A29 will just run the accelerator with the generated signal from U7 instead of the logicboard signal which worked just fine in my tests.

 

[JC8080]

In this recent thread, @DrGonzo found without a driver Tattle Tech identified the CPU as a 68020 running at 2.95 mhz. This was fixed with the proper driver.

https://macintoshgarden.org/apps/micromac-accelerator-software

Checker-board screen with 68030 Performer Accel in Mac SE

Greetings all! Wondering if anyone has built one of these and what their experience might be: https://github.com/TheRealBolle/Performer-SE-PL-CL I got a stack of boards from JLC and put one together on the quick with parts I had mostly on hand to see how it worked before building a few nicer...

68kmla.org

 

[macsonny]

No bodge wire needed at all on the original. The two options are either to remove U7 or don't connect pin A29 on the PDS connector and leave U7 on.

View attachment 58709
...remove or cut that pin from the PDS connector and you should be good.
The only purpose of U7 is to generate a 16MHz signal from the 8MHz CPU clock signal that's present on the Plus or Classic CPU socket.
The SE already has a 16MHz present on the PDS connector. If you leave U7 on you'll basically short the logicboard 16M signal to the one that's generated by U7. Removing pin A29 will just run the accelerator with the generated signal from U7 instead of the logicboard signal which worked just fine in my tests.

Just removed the U7 and starting some testing now. Will report back.....

 

[macsonny]

Happy days!!!!

 

[superjer2000]

It would be interesting to run speedometer on this. I had a Transwarp 2325 in my classic back in the day which also did not have RAM on board limiting the speed up. It was definitely faster than stock but even at 25mhz it was no where near an SE30.