Tiny68K, 68000 SBC, Rev 2

Tiny68K is a high-performance yet low-cost single board computer based on the Motorola 68000. Revision 2 of Tiny68K has the following changes:

• The Compact Flash interface of rev 1 is marginal. It may not work with faster CF drives due to ground noises generated by faster CF drives. Rev 2 design added isolation resistors to the data line, RC circuitry to the nIORD control line, and pull up resistors to the upper half of the 16-bit data line
• A 'warm boot' button is added that will generate a non-maskable interrupt to the 68000 when pressed.
• Add a real-time clock based on DS1302 that is backed up with a super capacitor.

Figure below shows an assembled rev 2 Tiny68K with annotations showing the changes from rev1 design.