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posted by
LaminatorX
on Friday February 21 2014, @01:33AM
from the I-don't-care,-I'm-still-free.-You-can't-take-the-garage-from-me dept.
from the I-don't-care,-I'm-still-free.-You-can't-take-the-garage-from-me dept.
demonlapin writes:
"Brian Benchoff at Hackaday has an ambitious new project: a homebrew computer based not on a classic 8-bit processor like the Z80 or 6502, but on the 16-bit Motorola 68000. It's a backplane-based machine with wire-wrapped connections planned. His first summary post is here. Blinkenlights are planned."
[ED Note: With so much commercially available hardware getting more and more locked down, projects like this are a good reminder of what is possible for a dedicated enthusiast.]
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Homebrew 68000-based Computer Build
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I'm not a robot like you. I don't like having disks crammed into me... unless they're Oreos, and then only in the mouth.
-- Fry
(Score: 5, Interesting) by shortscreen on Friday February 21 2014, @05:26AM
The 68000 takes four clock cycles for a memory access, so even back in the day it wasn't hard to design a system without wait states. The Amiga and Atari ST used 120ns DRAM that was quicker than necessary for the CPU itself, so there was memory bandwidth leftover for the video hardware to do its thing using the same bus.
BTW, a similar homebrew 68008-based computer, called Kiwi, was recently done by a German fellow. He also used a Yamaha video chip, but it is the later V9990. http://www.ist-schlau.de/hardware.html [ist-schlau.de]