My fingers aren't working too good today and my typing is dodgy so it would be nice if someone could verify what is written below and amend it if I have missed anything out
1 - ATMEGA3216PU 40 pin plus the socket for it to sit in (IC1)
DO NOT GET THE ATMEGA32A VERSION AS ITS THE WRONG ONE
1 - 74HC245N 20 pin plus the socket to sit in (IC4)
1 - 3.3V REGULATOR FOR SD CARD(1C2)
1 - XTAL 14.31818MHZ
2 - 22P CAPS FOR XTAL C1 AND C2)
5 - 22N CAPS (C5, C6, C7, C8 AND C9)
4 - 100N CAPS (C3, C10, C11 AND C12)
1 - TANTALUM CAPACITOR (10UF 10 - 35V) THIS ONE IS POLARISED (C4)
1 - 27 OHM RESISTOR (R 10)
3 - 220 OHM RESISTORS (R11, R12 AND R13) FOR LED'S
2 - 10K RESISTORS (R3 AND R1)
1 - 1N4148 DIODE (D1)
5 - PUSH TO MAKE SWITCHES (S1 TO 5)
2 - 6 PIN HEADERS DUAL INLINE ::: (JP2 AND JP3)
1 - 7 PIN STRAIGHT HEADER AND SOCKET FOR THE CABLE (JP1)
1 - 16 PIN STRAIGHT HEADER AND SOCKET FOR THE DISPLAY (JP4)
1 - LCD DISPLAY. I ORDERED THIS BUT CAN'T GUARANTEE ITS THE RIGHT ONE TILL IT GETS HERE.
http://www.ebay.co.uk/itm/221865370335 ITS A BUY IT NOW SALE
3 - LED'S OF YOUR CHOICE LED (1, 2 AND 3)
1 - POTENTIOMETER 2.2K (R2)
1 - SD SLOT [I HAVEN'T LOOKED INTO THAT YET OR THE SWITCHES]
TAKE A LOOK AT
https://www.retrohax.net/sio2sd-for-atari/
AND
http://sio2sd.gucio.pl/wiki/English
I hope it helps a little
