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Ic 15

Posted: Wed Sep 09, 2015 8:32 pm
by SimonGG
Hi all
I've just recently got a d32 off eBay,had one as a kid and wanted to get my hands on one again. Unfortunately I took a gamble an the one I got isnt working. What I've noticed straightaway is that IC15 is missing! Theres just a socket ,no chip. I was hoping someone could point me in the right direction... So far from googling I've found out its the mc6883 Sam chip, can I get one from anywhere? I must point out I'm no electronics guru, just someone that likes to tinker.
Many thanks for any help I received, really wanna try an get this up and running again

Re: Ic 15

Posted: Thu Sep 10, 2015 6:14 pm
by KenH
MC6883 is the Dragon SAM chip, also known as 74LS783.
You can find replacements on eBay, search for 74LS783
For example: http://www.ebay.com/itm/1PCS-SN74LS783N ... 566bb4a2f3

Re: Ic 15

Posted: Thu Sep 10, 2015 7:05 pm
by SimonGG
Many thanks will take a look

Re: Ic 15

Posted: Thu Sep 10, 2015 8:23 pm
by tormod
Hi Simon, welcome to the forum! I wouldn't be surprised if a few other parts are broken too since this one probably got "sacrificed". But we're here to help - and most spare parts are easy to get. Good luck with getting it back in order, we would love to see another Dragon rise from its beauty sleep!

Re: Ic 15

Posted: Thu Sep 10, 2015 8:59 pm
by sorchard
Hi Simon,

74LS783 also available here though a bit more pricey: http://www.littlediode.com

Re: Ic 15

Posted: Thu Sep 10, 2015 10:25 pm
by SimonGG
Thanks all for your replies

Re: Ic 15

Posted: Sat Sep 12, 2015 10:46 am
by SimonGG
Hi All, good news bought a new IC off eBay and fitted it this morning. Dragons working :D . Only problem I've found so far is keys 1-8 have to be pushed really hard to work so going to look into cleaning the keyboard switches .
thanks again for everyone's help