Project Status
12/01/2010:
This project can be traced back to May 2009 but it actually started to take shape on July 2009 when I adopted the 16-bits double-buffer architecture that finally survived. That was one year and five months ago. More that one thousand dollars have been spent since then in components, connectors and prototyping boards... very expensive stuff for a poor individual such as my self!
Most of the circuits have been drawn, some have been built and tested and a mountain of ideas about system software and applications has grown little by little, but only on paper because there is not way for testing them until the hardware is ready. An assembler (H1ASM) and a simulator (H1SIM) were developed in Borland Turbo Pascal 3 using an old MS-DOS PC.
What I was trying to build is a "lab implementation" of the CPU. The Console and most of their support boards were built and tested. The project was going well but slowly... very slowly: estimates showed me that it would take another year (at least) for completion.
On 10/13/2010 I made the difficult decision to put the project to sleep until I could find enough spare time in my busy life. I then started a simpler project termed LC-81, based on Zilog Z80 microprocessor instead of discrete logic.
I've started to post notes in the following site:
http://www.armandoacosta.com/lc81
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Project start date: May 13 of 2009
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