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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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 Posted: Mon Jul 15, 2013 8:36 pm Post subject: guess this die - Microsystems Int MF8080R |
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got a few chips a while back and with Genna's help guessed what they should be.
eventually I decided to open one to confirm
see if you can guess what it is 
below is a quick low resolution pic.. will add better resolution pics later in the week
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Last edited by Neon_WA on Fri Dec 20, 2013 8:40 pm; edited 2 times in total |
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frag_
Joined: 17 Nov 2008
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Location: Estonia
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| Posted: Tue Jul 16, 2013 12:12 am Post subject: |
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| 8080 |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Tue Jul 16, 2013 12:17 am Post subject: |
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correct family 
now see if you guess manufacturer
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There are 10 types of people in this world:
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gg1978
Joined: 31 Jul 2012
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| Posted: Tue Jul 16, 2013 12:20 am Post subject: |
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| microsystems international (MIL)?? |
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frag_
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| Posted: Tue Jul 16, 2013 12:20 am Post subject: |
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| Microsystems International |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Tue Jul 16, 2013 12:28 am Post subject: |
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both correct 
Notice it is marked MF8080 (not a MF8080A), though technically it is not a i8080
Genna may want to share the reason why this is so
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There are 10 types of people in this world:
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frag_
Joined: 17 Nov 2008
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Location: Estonia
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| Posted: Tue Jul 16, 2013 12:40 am Post subject: |
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| Neon_WA wrote: | | though technically it is not a i8080 |
BTW as i know difference should be visually very small, thickness of some power traces and nothing more, right? |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Tue Jul 16, 2013 12:57 am Post subject: |
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| frag_ wrote: | | BTW as i know difference should be visually very small, thickness of some power traces and nothing more, right? |
Yes I am aware of the widening of the power traces
This is info George has in the guide.. taken from a email from Andrew Volk (Intel)
8080A vs. 8080
In early 1975, Intel revised the 8080 design. The result was the 8080A, which also had somewhat greater speed potential (3.125 MHz).
Other improvements of 8080A vs. 8080 [4]:
• Some improvements in timings to prior specs to improve the yield. Power delivery on-die was made more robust.
• Output buffer size increased to improve IOL to 1.9 mA at 0.45 volts to allow driving a standard TTL load.
• Clock timing between PH1 and PH2 (tD3) improved to make clock generation not a problem.
• INT synchronized to the falling edge of PH2 during the last cycle of the instruction and during HALT.
Also, the PC register is not incremented during the interrupt instruction so that any branch instruction can
be executed. The MEMR is held inactive during M1 of an interrupt instruction. MEMR can still happen in M2 and M3.
The 8228-interface chip blocked MEMR in those cycles and provided the proper INTA signals.
• HOLD was resampled internally during not PH2 to make it fully asynchronous. The signal is sampled on PH2 rising during T2.
• Internal logic changed to allow RESET to be an effective interrupt to address 0 (zero).
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There are 10 types of people in this world:
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Vlasta
Joined: 15 May 2012
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| Posted: Tue Jul 16, 2013 3:25 am Post subject: |
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Nice shots and great information too. Thanks a lot!!
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best rgds.
Steve |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Mon Jul 22, 2013 2:20 am Post subject: |
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thought I would post a pic of where the die came from
supposedly they did go into production.. but I haven't seen any production marked MIL 8080s
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There are 10 types of people in this world:
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gshv
Joined: 01 Feb 2003
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Location: Fairfax, VA USA
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| Posted: Tue Jul 23, 2013 10:21 pm Post subject: |
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Well, the top chip is the most beautiful 8080 processor ever produced
Gennadiy |
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Neon_WA
Joined: 08 Nov 2008
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| Posted: Tue Jul 23, 2013 10:43 pm Post subject: |
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| gshv wrote: | Well, the top chip is the most beautiful 8080 processor ever produced
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Yes.. just a pity Intel or others didn't use that package
By the dates of other chips from the same place.. guessing it was made end of Q1 or beginning of Q2 1974
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There are 10 types of people in this world:
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Fri Dec 20, 2013 8:25 pm Post subject: |
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Thought I would record other known MIL 8080s that people have
The 8080s below are owned all by the same person, but they are unaware what they are.
I have been trying to secure an example for both CPU-World & The CPU Shack but sadly have not been able to
So the above examples have been donated instead
_________________
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
Last edited by Neon_WA on Sat Dec 21, 2013 5:55 am; edited 1 time in total |
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CPUShack
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gshv
Joined: 01 Feb 2003
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| Posted: Sat Dec 21, 2013 3:54 am Post subject: |
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It was the best donation I received so far. By the way, I received it. Thank you!
Gennadiy |
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