Difference between revisions of "Test Circuit used for ACID reverse engineering"

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(→‎Schematic)
(→‎Schematic)
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   A0..A7 ---- Data 0..7
 
   A0..A7 ---- Data 0..7
 
   GND,5V ---- GND,5V
 
   GND,5V ---- GND,5V
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 +
== Source Code ==
 +
 +
For curiosity, here's the original source code used for reverse-engineering. It's barely commented or user-friendly.
 +
* [[File:AcidTest.asm]]
  
 
== Pictures ==
 
== Pictures ==

Revision as of 10:56, 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

Source Code

For curiosity, here's the original source code used for reverse-engineering. It's barely commented or user-friendly.

Pictures

  • Original messy circuit

  • Top

  • Bottom

  • Parents 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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  • 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 don't like messy cables.

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