Tag: Project

Hardware test – 2nd phase

With the PCB's in and the initial hardware check finished and me delaying far too long on getting back to this project, it was time to move on to verifying that my intended hardware functionality did, in fact, work as planned.  There are several functional blocks that need to be tested, both on the AVR … Continue reading Hardware test – 2nd phase

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PCB arrival – initial hardware check

The Z80 SBC PCB's finally arrived.  They were shipped only 3 days after the 8052 SBC PCB's but arrived 10 days later.  Go figure ... When I was able to sit down and start the build process, I set out to populate and solder a test and development unit.  One of the 1st issues I had … Continue reading PCB arrival – initial hardware check

Update: Investigation into Z80 real-time debugging on the AVR

I am still awaiting the arrival of the Z80 (and 8052 SBC) printed circuit boards.  In the meantime, the FatFS portion is at a point that I would like to implement and debug on actual hardware, so until the PCB's arrive, that portion of the project sits "on the back burner", so to speak. Currently, I … Continue reading Update: Investigation into Z80 real-time debugging on the AVR

Project Reference: A “Modern Day” Z80 Hardware Emulator

I've been swapping emails with different people that are designing, or have designed and constructed various Z80 projects.  In particular, Chris Jones of Poland.  His web site is here.  In particular, I ran across his post on successfully using the sd-reader library here.  His post is one of a few that re-inspired me to investigate … Continue reading Project Reference: A “Modern Day” Z80 Hardware Emulator

Additional thoughts on “debugging” Z80 code on the Z80 SBC.

Until recently, I had not given much thought to the "debugging" Z80 code other than the simple "single-step" circuitry that some of the Z80 computers had at the time.  I started to realize that debugging code without being able to "see" the memory and internal registers of the Z80 could be a problem since during … Continue reading Additional thoughts on “debugging” Z80 code on the Z80 SBC.

Project goals as thoughts and concepts now put into words …

I have all these thoughts and concepts of how I would like to materialize this project into the final goals stored in my mind on "virtual paper", if you will.  As with most projects, as the project continues, my thoughts and ideas are also evolving.  Thus, I thought it was time to put those thoughts onto … Continue reading Project goals as thoughts and concepts now put into words …

Success with FAT library !

I've been dabbling off and on with the Elm-Chan FatFS library.  I was having a lot of issues customizing it for this project because I am an assembly language programmer and sometimes "C" code can be a bit baffling and frustrating for me to figure out ... especially when it's some one else's code. I … Continue reading Success with FAT library !