Macintosh-HW/SE-VGA

mirror of https://github.com/techav-homebrew/SE-VGA.git synced 2025-02-10 13:30:58 +00:00

Go to file

techav 7a519feab3 CPU cycle state machine

2021-04-17 15:41:53 -05:00

CPU cycle state machine

2021-04-17 15:41:53 -05:00

cpusnoop.sv

CPU cycle state machine

2021-04-17 15:41:53 -05:00

README.md

partial draft 1

2021-04-06 23:15:48 -05:00

se-vga.sv

CPU cycle state machine

2021-04-17 15:41:53 -05:00

sevga.vwf

CPU cycle state machine

2021-04-17 15:41:53 -05:00

vgacount.sv

First compile

2021-04-11 23:46:29 -05:00

vgagen.sv

First compile

2021-04-11 23:46:29 -05:00

vgaout.sv

CPU cycle state machine

2021-04-17 15:41:53 -05:00

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.