7 Nov
2009
7 Nov
'09
3:49 a.m.
This is the way we burn the roms (now to find some MCM6810 or compatible
rams and upgrade the ram in my old 1050 non double density) and make a US
doubler compatible 1050. Copied the rom from my other USDblr 1050, and need
to make the piggyback ram. ?course my DD 1050 needs new ram, it?s damaged
too :(
7 Nov
7 Nov
9:50 a.m.
There are a couple of sites still selling these and I could swear
someone had done a new PCB design with modern parts someplace:
http://cgi.ebay.com/US-Doubler-Upgrade-Atari-1050-800-XL-XE-ICD_W0QQitemZ14…
Curt
Geoffrey Reed wrote:
This is the way we burn the roms (now to find some
MCM6810 or compatible
rams and upgrade the ram in my old 1050 non double density) and make a US
doubler compatible 1050. Copied the rom from my other USDblr 1050, and need
to make the piggyback ram. ?course my DD 1050 needs new ram, it?s damaged
too :(
5:47 p.m.
Haven't come across the pcb with modern parts yet, I've emailed a place that
claims to have the 6810's at < 4 per chip, but they are slow in responding
to requests and if they do have it, they ship via carrier pigeon so it will
take half of forever to get here.
I know there are a few sites that are selling these, and other ones like the
happy board, but I have eproms a plenty, and although the US-Doubler is
fairly reasonably priced, and I'm on a fairly tight toy budget I'd rather
build it myself if I can.
And since my other USD 1050 is currently down with blown ram, I need to get
some 6810's anyways to fix it... Dropped in the original 1050 rom, reset
the jumpers and put the 1 known good 6810 I have into it and it worked fine,
just no DD.
On 11/7/09 6:50 AM, "Curt @ Atari Museum" <curt at atarimuseum.com>
wrote:
There are a couple of sites still selling these and I
could swear
someone had done a new PCB design with modern parts someplace:
http://cgi.ebay.com/US-Doubler-Upgrade-Atari-1050-800-XL-XE-ICD_W0QQitemZ14…
5684503QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item20ad413217&_trksid=p3286
.c0.m14
Curt
Geoffrey Reed wrote:
This is the way we burn the roms (now to find
some MCM6810 or compatible
rams and upgrade the ram in my old 1050 non double density) and make a US
doubler compatible 1050. Copied the rom from my other USDblr 1050, and need
to make the piggyback ram. ?course my DD 1050 needs new ram, it?s damaged
too :(
8:20 p.m.
On Sat, Nov 7, 2009 at 2:47 PM, Geoffrey Reed <geoffr at zipcon.net> wrote:
Haven't come across the pcb with modern parts yet,
I've emailed a place that
claims to have the 6810's at < 4 per chip, but they are slow in responding
to requests and if they do have it, they ship via carrier pigeon so it will
take half of forever to get here.
The 6810 is listed for $2.79 here if you need enough parts for the $25
minimum order.
http://www.unicornelectronics.com/
I haven't bought anything from them in a while. Had good results the last time.
8:53 p.m.
On 11/7/09, Glen Slick <glen.slick at gmail.com> wrote:
On Sat, Nov 7, 2009 at 2:47 PM, Geoffrey Reed
<geoffr at zipcon.net> wrote:
Unicorn is good. B.G. Micro also has them
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12933
... but buying one of anything from anyone is going to hit you on the
shipping as much as the part.
I've also seen those same SRAMs on a few other things - mostly 6800
designs, but a few older, smaller, 6502-based peripherals.
-ethan
Haven't come across the pcb with modern parts
yet, I've emailed a place
that
claims to have the 6810's at < 4 per chip, but they are slow in responding
to requests and if they do have it, they ship via carrier pigeon so it
will
take half of forever to get here.
The 6810 is listed for $2.79 here if you need enough parts for the $25
minimum order.
http://www.unicornelectronics.com/
I haven't bought anything from them in a while. Had good results the last
time. 
8 Nov
8 Nov
10:51 a.m.
<1e1fc3e90911071720u791a3078s53b4e9f825bf67ac at mail.gmail.com>
<f4eb766f0911071753y13ca1657md0b9f47168f4c44a at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
----------------------------------------
Hi
Many places carry these. Most places that supply pinball machine
parts carry them.
I checked the two places I use often for electronics parts
around me:
Anchor Electronics $1.98 ea
JameCo $2.95 ea
=20
I suspect that HSC has them as well but they usually
sell chips over the counter.
All where listed as 1MHz though.
Dwight
=20
_________________________________________________________________
Windows 7: Unclutter your desktop.
http://go.microsoft.com/?linkid=3D9690331&ocid=3DPID24727::T:WLMTAGL:ON…
en-US:WWL_WIN_evergreen:112009=
Date: Sat=2C 7 Nov 2009 20:53:03 -0500
Subject: Re: Atari Disk Drives...
From: ethan.dicks at gmail.com
To: cctalk at classiccmp.org
On 11/7/09=2C Glen Slick wrote:
> On Sat=2C Nov 7=2C 2009 at 2:47 PM=2C Geoffrey Reed wrote:
>> Haven't come across the pcb with modern parts yet=2C I've emailed a pla=
ce
>> that
>> claims to have the 6810's at < 4 per chip=2C but they are slow in respo=
nding
>> to requests and if they do have it=2C they
ship via carrier pigeon so i=
t
>> will
>> take half of forever to get here.
>>
>
> The 6810 is listed for $2.79 here if you need enough parts for the $25
> minimum order.
>
> http://www.unicornelectronics.com/
>
> I haven't bought anything from them in a while. Had good results the las=
t
time.
Unicorn is good. B.G. Micro also has them
http://www.bgmicro.com/index.asp?PageAction=3DVIEWPROD&ProdID=3D12933
... but buying one of anything from anyone is going to hit you on the
shipping as much as the part.
I've also seen those same SRAMs on a few other things - mostly 6800
designs=2C but a few older=2C smaller=2C 6502-based peripherals.
-ethan 
7 Nov
7 Nov
11:04 p.m.
I have boatloads of 6810's here - I salvage them from old pinball ckt bds
Send your home addr off-list and I'll drop some in the mail.
=Dan
Geoffrey Reed wrote:
Haven't come across the pcb with modern parts yet,
I've emailed a place that
claims to have the 6810's at < 4 per chip, but they are slow in responding
to requests and if they do have it, they ship via carrier pigeon so it will
take half of forever to get here.
I know there are a few sites that are selling these, and other ones like the
happy board, but I have eproms a plenty, and although the US-Doubler is
fairly reasonably priced, and I'm on a fairly tight toy budget I'd rather
build it myself if I can.
And since my other USD 1050 is currently down with blown ram, I need to get
some 6810's anyways to fix it... Dropped in the original 1050 rom, reset
the jumpers and put the 1 known good 6810 I have into it and it worked fine,
just no DD.
On 11/7/09 6:50 AM, "Curt @ Atari Museum" <curt at atarimuseum.com>
wrote:
There are a couple of sites still selling these
and I could swear
someone had done a new PCB design with modern parts someplace:
http://cgi.ebay.com/US-Doubler-Upgrade-Atari-1050-800-XL-XE-ICD_W0QQitemZ14…
5684503QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item20ad413217&_trksid=p3286
.c0.m14
Curt
Geoffrey Reed wrote:
> This is the way we burn the roms (now to find some MCM6810 or compatible
> rams and upgrade the ram in my old 1050 non double density) and make a US
> doubler compatible 1050. Copied the rom from my other USDblr 1050, and need
> to make the piggyback ram. ?course my DD 1050 needs new ram, it?s damaged
> too :(
>
>
>
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5370
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6 comments
6 participants
participants (6)
-
curt＠atarimuseum.com -
dkelvey＠hotmail.com -
ethan.dicks＠gmail.com -
geoffr＠zipcon.net -
glen.slick＠gmail.com -
ragooman＠comcast.net