The project is still under construction, but some functionality can be allready seen o.May 14, 2019 The SRAM will probably have to run at 100MHz to be shared between these functions.Jan 07, 2020This is a demo video of my homebrew Z80 microprocessor based computer. What I currently have in mind is a Z80 20MHz running the target code, an atMEGA (atMEGA1284 to start with) or 25MHz doing all I/O interfacing and assisting with VGA generation and a CPLD clocking out the pixels to a VGA port 50 MHz.The program running on the Z80 writes to this 4k Page, changes the control register to map it to the next 4k of VRAM and writes it again -and so on. The VGA interface uses an extended memory 4k page as a window between CPU memory and Video Memory. Mar 23, 2021Trying to get the VGA bus interface going I found a problem that lead me to a path of debugging the MMU for several days.
