This is page about hardware creations for CoCo-3's
 

2MB upgrade circuit board, layout screenshot.  IDE interface plug-in circuit board, layout screenshot.  MPI clone, 8 slots, circuit board, layout screenshot.  4MHz circuit in one chip.  NoCan: Serial, Parallel, 2-Megs and 4MHz!  NoCan2: 16650 intead of 6551, ditto above.  Now with actual photos and running boards!  Pocket IDE: Underneath the coco-3.  PaPaZilla: A coco-3B, with enhancements.  64MB: Yes, that's right, on the "other site".

Presented by: Only On Saturday Night

Inside of the case is: Hitachi HD63C09EP CPU, 8MB memory (Yup! works too!), 16550 serial port, 68B21 parallel port, "4MHz" Turbo circuit and full CPU buffers, all on one piggy-back circuit board. External to the CoCo-3 case is: 3 IDE drives, 3 floppy drives, with a PC-type power supply for the drives.

Click the above thumbnail button to see how that is all possible.