| View previous topic :: View next topic |
| Author |
Message |
smithy
Joined: 27 Apr 2008
Posts: 2906
Location: Sydney, Australia
|
 Posted: Mon Oct 25, 2010 7:02 pm Post subject: DRAG 626668-1 |
 |
|
| Just picked up a board with a DRAG 626668-1. It is a Magnavox board from an early GPS (had an LD8087 on it). Does anyone know what the DRAG is? |
|
| Back to top |
|
 |
Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
|
| Posted: Mon Oct 25, 2010 7:09 pm Post subject: |
|
|
Dynamic Random Access Gibberish?
Sorry, I am no help.
It is a nice looking chip - good find. |
|
| Back to top |
|
|
Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
|
| Posted: Mon Oct 25, 2010 7:27 pm Post subject: |
|
|
being on a GPS unit, it is most likely a processor.
so to narrow it down.. what processor comes in 48-Pin CDIP & uses a square to denote Pin 1 
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
|
| Back to top |
|
|
smithy
Joined: 27 Apr 2008
Posts: 2906
Location: Sydney, Australia
|
| Posted: Mon Oct 25, 2010 7:30 pm Post subject: |
|
|
could it be a variant of a motorola 68000 series?
_________________
My former Intel collection:
www.smithschips.com.au |
|
| Back to top |
|
|
Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
|
| Posted: Mon Oct 25, 2010 7:37 pm Post subject: |
|
|
ceramic 48-pin i can find so far are
Zilog Z8001....
Moto MC68008...
National NS32016D... (NS16032D...)
most motos i can see use a Dot or a 1 to identify Pin 1
most NS use a Dot or solid Square
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
|
| Back to top |
|
|
Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
|
| Posted: Mon Oct 25, 2010 7:50 pm Post subject: |
|
|
I think you will have to have another look at the board for a processor
cos i think the DRAG chip is a A/D convertor
the processor is probably the plastic one between the FPU & DUART
probably a Harris 8088
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
|
| Back to top |
|
|
smithy
Joined: 27 Apr 2008
Posts: 2906
Location: Sydney, Australia
|
| Posted: Mon Oct 25, 2010 8:05 pm Post subject: |
|
|
Yeah there is Harris chip, but the print looks like it is worn off, and it is next to the 8087.
_________________
My former Intel collection:
www.smithschips.com.au |
|
| Back to top |
|
|
hugo929
Joined: 27 Oct 2006
Posts: 6163
Location: China
|
| Posted: Mon Oct 25, 2010 8:16 pm Post subject: |
|
|
being on GPS board, it is likely to be eight channel corelator for capture & decode GPS signal include navigation ephemeris.
_________________
My vintage CPU collection:www.cpumuseum.com
Chinese Forum: http://www.cpumuseum.com/forum |
|
| Back to top |
|
|
CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
|
|
| Back to top |
|
|
magictom
Joined: 14 May 2009
Posts: 2281
Location: Hawaii
|
| Posted: Thu Feb 10, 2011 4:22 pm Post subject: |
|
|
| smithy wrote: | | Yeah there is Harris chip, but the print looks like it is worn off, and it is next to the 8087. |
Mystery solved: I just got another one of these GPS boards, and the CPU is definitely a Harris CP80C86. I agree the "DRAG" thing must be some kind of DSP chip. |
|
| Back to top |
|
|
CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
|
|
| Back to top |
|
|
|
![[ Hidden ]](https://cdn.cpu-world.com/forum/templates/CPUWorld/images/lang_english/icon_email.gif "[ Hidden ]"){kind=icon}
