ATLAS VIDEO MODE DEMO
HTML-код
- Опубликовано: 11 сен 2024
- Demo of the video card module of my Atlas Computer, a Z80 DIY computer currently running at 10MHz.
Supports 4 video modes
320x200x4 (16 colors) Text & Graphics
640x400x1 (2 colors) Text & Graphics
I am using a Renesas (IDT) 32K x 8 Dual-Port RAM and a Tang Nano FPGA.
All info will be made available on the website when i finalize my design.
Current progress is always available on Github.
newbrainemu.eu...
github.com/cde...
It is an interesting project. can briefly explain how vram is "seen" from the cpu perspective? is seen as a memory paged block, is shared in the z80 space? Do the CPU be slowed down or blocked when it does access the vram during screen build up ? ( i think no, because of dual ported ram)
Cpu has access through the MMU so the delay is just the page in and out. No delays as it is dual port so no blocking.
@@CDESP072 thx for explanations
Why it's so slow in gfx ? it should not be if the CPU is running @10Mhz and filling 32KVRam
At that time my storage device was an arduino nano communicating with z80 via rs232.
@@CDESP072 baud rate?
@@gasparinizuzzurro6306 i think 38400bps