68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.
MicroMac Performer Redux: Cloning a 68030 Accelerator for Compact Macs
Posted by: techknight on 2018-12-28 05:55:50
Well the GALs/PALs need reverse engineered, and equivalent functions re-written for the XC series of chips. Maybe the XC9536 like what I used in the RAM card. GALS/PALs arnt made anymore. 
Posted by: Trash80toHP_Mini on 2019-01-14 07:38:28
View attachment 21381

View attachment 25906

View attachment 25907

http://www.micromac.com/products/performer.html +

http://www.micromac.com/products/thundercache.html =

________________________________________________________________________

http://www.micromac.com/products/performerpro.html

View attachment 21484
Posted by: Trash80toHP_Mini on 2019-01-16 10:04:01
View attachment 25921

View attachment IceBag-00.PDF
Posted by: Trash80toHP_Mini on 2019-01-20 11:08:12
68020-to-68000-PAL-Conversion-Comp.JPG

68020-to-68000-PAL-Conversion-Sldr.JPG
Posted by: Trash80toHP_Mini on 2019-01-21 08:58:39
View attachment CCLC-SE-PDF-GS-002.PDF
Posted by: Trash80toHP_Mini on 2019-01-22 09:05:30
View attachment 25983

View attachment CCLC-SE-PDF-GS-005.PDF
Posted by: Trash80toHP_Mini on 2019-02-05 10:49:22
68030-68882.JPG
Posted by: LaPorta on 2020-03-03 19:54:26
Did you ever get this going?
Posted by: electricmonk on 2020-03-22 01:28:27
Any progress on this one? Cracker of a thread.
Posted by: Trash80toHP_Mini on 2020-06-15 05:35:03
Sorry for the late reply. No progress to report up until the last week or so.

I've dusted off the project and may have made a significant conceptual breakthrough? The five GAL (U7 inclusive) Mac Plus Performer appears to be far more interesting than the four GAL (U3-U6) SE version, which runs at 16MHz off the 16MHz clock on its PDS. The Plus version's GAL at U7 appears to be doubling the 8MHz line on the 68000 to 16MHz. By extension, the same might be assumed to be true when the proposed Performer/Laguna has the U7 clock multiplier GAL connected to the 16MHz line on the Portable's PDS?

PerformerPro for Plus and SE are spec'd at 32MHz:

View attachment 21482

So at present, my working assumption/theory would be that we're looking into putting a 32MHz 68030 accelerator in the Portable's PDS. 😱

< 7