995be6b5dc
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| README.md | ||
| cpusnoop.sv | ||
| se-vga.sv | ||
| sevga.vwf | ||
| vgacount.sv | ||
| vgagen.sv | ||
| vgaout.sv | ||
| vgashiftout.sv | ||
README.md
SE-VGA
Simple CPLD project to mirror the Mac SE video over VGA. No scaling is performed -- the Mac 512x342 video is displayed letterboxed (black borders) in a 640x480 frame.
Circuit uses a single AFT1508AS-100AU CPLD, 32kx8 15ns SRAM, and a 25.175MHz can oscillator, along with some passives.
Plugs into SE PDS slot and snoops writes to the frame buffer memory locations. Writes are cached and copied to VRAM.