I`ve managed to run the initial version of the ROM Monitor program and placed it in FLASH memory. Here is a list of available commands:
dump: Memory dump from a given address
edit: Memory editor.
fill: Filling the memory with fixed content.
copy: Copying one part of the memory to a different location
cls:Â Clearing the screen.
input: reading a byte from I/O port
output: sending out a byte to I/O port
jump: Jump to given address.
load: loading data/code to RAM memory trough bootloader board connected to input port on the motherboard.
Below you can watch a youtube presentation of the system. Check it out !
8-bit computer from scratch. 
Great stuff! It is similar in many ways to my 6809 machine. Love the home made PCBs. đ Are you still working on the computer?
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Hi, thanks for your comment, yes I`m still working đ Writing a full documentation in PDF took some while, and now the UART card will soon be manufactured. Next will be a Z80 CTC card (clock/counter IC from Z80 family). I`m also planning to add some form of mass storage solution, but I can`t decide on this subject. Other plans include parallel to I2C card based on PCA9564 – this will enable to interaface a vast number of interesting I2C chips to Z80 CPU đ The whole project will be enclosed in a wooden case to give it a 70`s “wooden era” of computing look that I love đ
I haven`t seen your blog before, It`s very interesting, and I`ll shurely investigate it carefully! Nice that you`ve hunt down a decent video chip ! I haven`t been able to do so, and I`ve ended up using AVR for the job – it`s a solution I`m not very proud of, as I wanted the project to be as oldschool as possible đ
Keep up the good work !
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