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Re: Expansion storage board

Thanks again, for all the help :) I was using the veroboard, just because i have alot lying around, i was just going to use an old pata cable to bring the 40 pin expansions lanes, to the board. Ahh ok ive got quite a few cap's lying around so il install a few of them. And ill take a look at your des...
by S_Parkinson
Aug Wed 22, 2012 5:15 pm
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

How does this look?
by S_Parkinson
Aug Tue 21, 2012 5:26 pm
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

Just needed some help, Where the n/c ( pin 1 ) on the EEPROM chip connect to? on the 74LS00, where do i get the phi2 ( i assume its the 5mhz one on the replica one ) connection from? Are the DQ0-7 the same as D0-7 Am i correct in assuming that the vcc is =5v? Sorry for all the questions, im just wan...
by S_Parkinson
Aug Mon 20, 2012 2:35 am
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

and would this EEPROM chip be ok to use? :) http://australia.rs-online.com/web/p/ee ... s/0394504/
just that this is really one of the very few I am able to get my hands on. Thanks :)
by S_Parkinson
Aug Fri 17, 2012 5:03 am
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

Just to check, the link you posted originally ( http://www.brielcomputers.com/eeprom.pdf ) you just match up the labled circuit lanes, to the ones in the 40 pin expansion area?
Cheers
by S_Parkinson
Aug Fri 17, 2012 5:01 am
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

Also, what would i have to do in terms of software to be able to safe to the expansion EEPROM? :)
by S_Parkinson
Aug Wed 15, 2012 11:19 pm
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Expansion storage board

Looking at EEPROM, i was contemplating getting one of the cassette expansions boards, however i was hoping to do somehting more " home made "
Thanks for the link and quick reply :)
by S_Parkinson
Aug Wed 15, 2012 11:12 pm
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Expansion storage board

Hey everyone, i was looking at making an expansion board that would allow me to store programs i write in basic, Has anyone already attempted this, or has any schematics do do with this?
Any help is greatly appreciated
Cheers
by S_Parkinson
Aug Wed 15, 2012 8:20 pm
 
Forum: Creation Room
Topic: Expansion storage board
Replies: 12
Views: 20369

Re: Reset button

Yes, it was my soldering, didn't realise in the crappy light I was soldering in that I had had bridged two pins, with the slightest amount of solder, I have fixed that up, all works now :)
thanks for the quick reply and sorry for the rookie mistake.
by S_Parkinson
Aug Mon 13, 2012 2:26 am
 
Forum: Troubleshooting
Topic: Reset button
Replies: 3
Views: 7483

Reset button

I finally got around to soldering my replica one, Voltages are fine, I get a display output, cursor apears, however when i press reset instead of a / i get a T@ or an R@ or an m@ and if i keep pressing it they will add up like ttrmtttrrrmmmttt@
anyone have any ideas?
by S_Parkinson
Aug Sun 12, 2012 7:23 am
 
Forum: Troubleshooting
Topic: Reset button
Replies: 3
Views: 7483

School Project

I am Currently doing my Year 10 electronics major and I was thinking about making a replica 1 however making my own motherboard design and adding a rca to vga circuit to the board. Is anyone able to suggest any place to buy parts or any where I can find schematics to help me design my board. Cheers ...
by S_Parkinson
Apr Sun 15, 2012 7:07 pm
 
Forum: Creation Room
Topic: School Project
Replies: 0
Views: 4303

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