| View previous topic :: View next topic |
| Author |
Message |
MHz
Joined: 13 Nov 2009
Posts: 271
|
 Posted: Wed Sep 15, 2010 1:21 pm Post subject: CM8002 |
 |
|
What is it? Memory, CPU, MCU? Any ideas or links?
Thanks.
MHz |
|
| Back to top |
|
 |
iguana
Joined: 24 Apr 2007
Posts: 2456
Location: Ottawa, Canada
|
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Wed Sep 15, 2010 1:57 pm Post subject: |
|
|
Generally Pravetz seems to be mystery  manufacturer. Very little information on the Internet (or I can not google them). The list from Elar does not contain memory CM8001 also. |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Wed Sep 15, 2010 2:12 pm Post subject: |
|
|
Hmm, the chips 1 and 4 in the calculator seem to have 12 or 14 legs while the one on my picture is in DIL24 package.
MHz |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
| Posted: Wed Sep 15, 2010 2:34 pm Post subject: |
|
|
| OK, it's PMOS 256 bit (64x4) RAM |
|
| Back to top |
|
|
jrmunro
Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada
|
| Posted: Wed Sep 15, 2010 2:41 pm Post subject: |
|
|
| MHz wrote: | Hmm, the chips 1 and 4 in the calculator seem to have 12 or 14 legs while the one on my picture is in DIL24 package.
MHz |
They do have 12 legs on each side. They look the same as the CM7301. If there was a closer pic you would see the other legs. |
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Wed Sep 15, 2010 2:43 pm Post subject: |
|
|
Thank you for the information. Can you also post a scan of pages about CM8001 if it is described in this book?
MHz |
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Wed Sep 15, 2010 2:46 pm Post subject: |
|
|
| jrmunro wrote: | | MHz wrote: | Hmm, the chips 1 and 4 in the calculator seem to have 12 or 14 legs while the one on my picture is in DIL24 package.
MHz |
They do have 12 legs on each side. They look the same as the CM7301. If there was a closer pic you would see the other legs. |
I understand. I like CM7301 package. |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
| Posted: Wed Sep 15, 2010 2:46 pm Post subject: |
|
|
| CM8001 is clone of the Intel 1101A. |
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Wed Sep 15, 2010 2:49 pm Post subject: |
|
|
| Elar wrote: | | CM8001 is clone of the Intel 1101A. |
Yes, I know, but I was wondering if there are any differences in specification (timing, voltages, etc.)
MHz |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
| Posted: Wed Sep 15, 2010 2:56 pm Post subject: |
|
|
| End is on page 142 above. |
|
| Back to top |
|
|
MHz
Joined: 13 Nov 2009
Posts: 271
|
| Posted: Thu Sep 16, 2010 1:25 am Post subject: |
|
|
Thanks.
MHz |
|
| Back to top |
|
|
|
![[ Hidden ]](https://cdn.cpu-world.com/forum/templates/CPUWorld/images/lang_english/icon_email.gif "[ Hidden ]"){kind=icon}
