Test Circuit used for ACID reverse engineering: Difference between revisions
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Created page with 'ACID Reverse Engineering == Schematic == Desoldered ASIC chip from Fano's cartridge (thanks, Fano), attached to PC's parallel printer port: ACID PC CLK --…' |
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== Pictures == | == Pictures == | ||
<gallery caption="Original circuit"> | <gallery caption="Original messy circuit"> | ||
Image:AcidTestOldTop.jpg|Top | Image:AcidTestOldTop.jpg|Top | ||
Image:AcidTestOldBottom.jpg|Bottom | Image:AcidTestOldBottom.jpg|Bottom | ||
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---- | ---- | ||
<gallery caption="Newer circuit"> | <gallery caption="Newer clean circuit"> | ||
Image: | Image:AcidTestHomeTop.jpg|Top | ||
Image: | Image:AcidTestHomeBottom.jpg|Bottom | ||
Image: | Image:AcidTestHomeWorkplace.jpg|Nocash Headquarters | ||
</gallery> | </gallery> | ||
When I came back home, I wrecked the original circuit, and made a miniaturized adapter with robust centronics socket. Not that I'd still really needed it, I've been already done with the rev engineering at that time - I just didn't like messy cables. | When I came back home, I wrecked the original circuit, and made a miniaturized adapter with robust centronics socket. Not that I'd still really needed it, I've been already done with the rev engineering at that time - I just didn't like messy cables. | ||
Revision as of 15:39, 20 February 2010
ACID Reverse Engineering
Schematic
Desoldered ASIC chip from Fano's cartridge (thanks, Fano), attached to PC's parallel printer port:
ACID PC CLK ---- Strobe CCLR ---- Init SIN ---- Busy /OE ---- Select A0..A7 ---- Data 0..7 GND,5V ---- GND,5V
Pictures
- Original messy circuit
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Top -
Bottom -
Anonymous clean desk
This is original circuit, assembled while I was visiting my parents. I couldn't find a 36pin centronics socket, only a (very) old 25pin RS232 cable, so I needed to use that.
- Newer clean circuit
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Top -
Bottom
-
Nocash Headquarters
When I came back home, I wrecked the original circuit, and made a miniaturized adapter with robust centronics socket. Not that I'd still really needed it, I've been already done with the rev engineering at that time - I just didn't like messy cables.