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Re: Re: [N8VEM: 13899] Sourcing Parts
Things are now starting to get interesting, lol.
I've place my main order of parts already with the 3.6864 oscillator. Thats no biggy, ont $1.20. I'm more concerned with all the 74LS parts that I have ordered. Will they work at the 6Mhz, or do I need ALS?
Second Question, Sergey has 20Mhz CMOS Z80s, can they be underclocked & run at 6Mhz?
Wow, didn't realise my first non kit build would be this complex. Going to be a pretty special feeling getting this one working!
Wayne.
On Wednesday, June 20, 2012 6:50:16 PM UTC+10, brizza wrote:Hi Wayne,
Just in case you are not already aware, you'll need a 6mhz cpu oscillator or faster to get the floppy drives to work properly.
Regards,
Nik
> opticpow <wa...@ingram.net.au> wrote:
>
> Hi Nik,
>
> Thanks for the info! I has noticed the some of the parts, but was not
> sure
> of their compatibility.
>
> Much appreciated.
>
> Wayne.
>
> On Wednesday, June 20, 2012 1:07:18 PM UTC+10, brizza wrote:
> >
> > Hi Wayne,
> > Futurlec has substitutes for most of them;
> > Part Number Description Qty Price (AUD)
> Total
> > (AUD)
> > 8250A 8250A - Asych. Communication
> > Element 1 4.50 4.50 Remove
> > Z80B Z80B - CPU 1 1.95 1.95 Remove
>
> > 74LS06 74LS06 - Hex Inverter Buffer/Driver (Open
> > Coll.) 1 0.50 0.50 Remove
> > OSC1.8432 1.8432MHz Crystal
> > Oscillator 1 1.90 1.90 Remove
> > 628512 628512 - 512Kx8 CMOS
> > RAM 1 12.90 12.90 Remove
> > OSC3.6864 3.6864MHz Crystal
> > Oscillator 1 1.20 1.20 Remove
> > Total (AUD) 22.95
> >
> > the floppy controller chip can be found on ebay
> >
> >
> http://www.ebay.com.au/itm/FDC9266-FLOPPY-DISK-CONTROLLER-IC-/27078483317
> 6?pt=LH_DefaultDomain_0&hash=item3f0c08a698
> > network resistors from element14 or ebay?
> >
> > Regards,
> > Nik
> >
> >
> >
> >
> > > opticpow wrote:
> > >
> > > Hi All,
> > >
> > > As I've mentioned in my first post, I've been working on sourcing
> the
> > > parts
> > > for the SBC v2, backplace & Disk IO v3. I am getting most parts from
>
> > > Futurlec, ECB connectors from Altronics, and the odd part from
> Jaycar
> > > (pickup from local store)
> > >
> > > There are a few harder to get parts and I'm look for suggestions. It
>
> > > seems
> > > that I can get them from Jameco & Digikey, but with the shipping
> costs,
> > > I
> > > might as well get all my parts from them. The items I still need
> are:
> > >
> > > 4Mhz & 1.8432Mhz oscillators - Digikey
> > > 1k & 4.7k resistor networks - Digikey
> > > SRAM - Jameco / Ebay
> > > Z80 - Jameco
> > > 74LS06N - Digikey
> > > FDC9266 - Ebay / utsource
> > > 16550 - Ebay / utsource
> > >
> > > I wanted to try and keep down the number of suppliers, otherwise the
>
> > > shipping will add up and I might as well just get it all from Jameco
> &
> > > Digikey.
> > >
> > > Any advice would be appreciated.
> > >
> > > Wayne.
> > >
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