Reflashing SIO2SD

[AtariGeezer]

Today I was testing an 835 modem with the SIO2SD connected and 835 made a weird noise. Afterward the LCD display on the SIO2SD came up with a row of blocks on the top line, and only the green LCD lights up...

 

Can I reflash the atmel chip from the six pin connections on board? If so, How do I wire it up to an LPT Port?

 

Or how can I get a new programmed Atmel for it?

 

Thanks,

Jay

[sloopy]

stk-200 cable, third schematic down...

http://my.opera.com/CrazyTerabyte/blog/2007/10/26/first-contact-with-atmega8-microcontroller-part-2

 

sloopy.

[AtariGeezer]

stk-200 cable, third schematic down...

http://my.opera.com/CrazyTerabyte/blog/2007/10/26/first-contact-with-atmega8-microcontroller-part-2

 

sloopy.

 

Thank you

I'll run down to the parts store tomorrow and get the 6-pin header and make a cable...

[AtariGeezer]

Next Question:

What program is used in that configuration?

AVRprgWin's docs says to use different pins on the LPT port for SCK snd Reset...

[AtariGeezer]

or should I use this one from This Thread instesd for AVRprgWin?

 

Thanks again,

Jay

Edited May 2, 2011 by AtariGeezer

[flashjazzcat]

I'd say if you use the diagram I posted in Post #2 and the software I also posted, you'll have no problems. The crystal and +5v supply are unnecessary, since the power and timing will come from the SIO2SD itself when you're flashing it.

[Rybags]

What's the exact model PIC used in SIO2SD (I don't feel like pulling my LCD off again) ?

 

It's almost looking like worth being buying a spare then programming it and having it stored away in case anything goes wrong.

[flashjazzcat]

ATMEGA32

16PU

0934D

 

...is what it say on the chip I have here.

[AtariGeezer]

I'd say if you use the diagram I posted in Post #2 and the software I also posted, you'll have no problems. The crystal and +5v supply are unnecessary, since the power and timing will come from the SIO2SD itself when you're flashing it.

 

Thank you for the clarification FJC

[AtariGeezer]

Woo Hoo!!! Got my SIO2SD back up and running with v3.0rc5, also set the Fusebits to (H: 0xC3, L: 0x3F)...

 

Thanks again for the help...

[c0nsumer]

For what it's worth, I really, really, really like the Atmel AVR Dragon as a do-all programmer. It's now supported by avrdude so I can use it from OS X without issue. I've got a bit about mine and the DIP40 ZIF socket that I fitted it with here.

 

(This is the device that I used for flashing the SDrive NUXX AVRs via HVPP mode.)