danjovic
" The MCX128 is an expansion module for the TRS-80 MC-10 or Matra Alice 4K. It adds 128K static RAM and a socket to accomodate a 27128, 27256 or 27512 EPROM.
The board is supported by an extended version of the MicroColor Basic interpreter (MCX Basic) which needs to be programmed into the EPROM. MCX Basic adds many of the language features found in Extended Color Basic for the Tandy Color Computer (CoCo). It also supports using a PC/Mac or other host device as a file server. " (source MCX Wares)
This work presents a new PCB for the project, being the main changes:
- Reduced the PCB size
- Change the 74LS21 dual quad AND gate for an 74LS08 which is easier to find
- Added a power LED
- ROM selection can be done either by Read Switches or Jumpers
The PLD code as well as the ROM binary can be found at the author's Blog Page
f4hdk
Diyouware
Dan