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Monthly Archives: April 2010

CA-42 as USB to RS232 converter 5V signal compatibility

26/04/2010 – 00:23

The Nokia CA-42 cable is well known as a cheap USB to RS232 converter. You can get them on eBay for about £1. One thing that was not clear from most of the articles about it is how tolerant the signalling voltage can is. According to the datasheet for the IC used in the CA-42 [...]

By mojo | Posted in electronics | Comments (0)

AVR / electronics quick reference sheet

23/04/2010 – 18:31

I am working on a quick reference chart (cheat sheet). It’s by no means done but a post over at Adafruit made me think to post it: quickref.pdf

By mojo | Posted in avr, electronics | Comments (0)

Hori Famicom trackball protocol

22/04/2010 – 23:34

I just finished adding support for Famicom/NES trackballs to the Retro Adapter firmware. I can now use it as a mouse :-) The protocol is quite simple. Data is read from the controller in the same way as a normal gamepad. The first 8 bits are the same, followed by 4 bits of y axis [...]

By mojo | Posted in electronics, hardware | Comments (0)

Famicom controller port pinout

19/04/2010 – 00:02

I am in the process of adding support for various Famicom controllers in the Retro Adapter firmware. I have a trackball and a mahjong controller I am working on. I thought it would be easy enough to find the Famicom controller port pinout online, but both of the pages I found (here and here) are [...]

By mojo | Posted in electronics, hardware | Comments (2)

Playstation 2 controller I/O error

12/04/2010 – 18:49

I have been tracking down the last few bug with the Saturn/SNES to Playstation converters. It turns out that some revisions of the PS2 and one PS2 to XBOX 360 converter both have messed up timing. The acknowledge pulses come after the next data byte has started. Official controllers can cope with that, but some [...]

By mojo | Posted in electronics, microcontrollers | Comments (0)
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