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Date Posted: 13:56:46 02/02/02 Sat
Author: Potter
Subject: Re: Need 5508w system info
In reply to: ChuckY 's message, "Re: Need 5508w system info" on 03:05:05 02/02/02 Sat

The fluffy programmer connects to the 6 pin header next to the SX chip via a flying lead for in-system programming and is controlled by a serial interface to your PC. Getting the SX code to match the resonator or crystal speed will probably take quite a few tries to get it just right IE edit the asm file/assemble with mpasm/reprogram the SX/check the result so not having to remove the chip is an advantage. There are other types of programmers which can do the same job - this was the most successful for me.
The first hurdle with a disabled 5508W box is getting it to tune stations (just shows a blue screen) and most of the modifications are about fixing this by interfacing a PIC chip (PIC16F84A) with suitable code (tuner.asm) to bring it back to life so the first requirement to start this project is a PIC programmer as the fluffy uses a PIC16F84A as well.

>I am having a problem understanding the info on the
>mod for the 5508w box. how do you use the fluffy thing
>to program the SX18 chip
>
>unless I can find this info out there is no point in
>me getting a SX18 chip
>
>
>>Sakman has my stuff for 5508 type 3 box on his site:
>>System is PAL B/G 50Hz with random inversion
>>http://briefcase.yahoo.com/bc/sakman55

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