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Tonyo
Joined: 25 Jun 2003
Posts: 733
Location: Nancy - France
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 Posted: Tue Jul 15, 2003 3:05 am Post subject: Intel D7220 |
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Hi
I have this chip, but no information about ...
someone can help me ??
Thx
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morkork
Joined: 25 Feb 2003
Posts: 447
Location: Nuremberg, Germany
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| Posted: Tue Jul 15, 2003 6:28 am Post subject: |
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This is a graphics controller.
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http://cpu-collection.de |
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gshv
Joined: 01 Feb 2003
Posts: 7898
Location: Fairfax, VA USA
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| Posted: Tue Jul 15, 2003 9:05 am Post subject: |
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Similar chip from NEC :
Gennadiy |
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Tonyo
Joined: 25 Jun 2003
Posts: 733
Location: Nancy - France
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| Posted: Tue Jul 15, 2003 4:04 pm Post subject: |
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ok
thx for the info ... |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Wed Jul 16, 2003 3:26 pm Post subject: |
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| morkork wrote: | | This is a graphics controller. |
This is not a graphics controller. Intel's clone of NEC 7220 was i82720. It is much more interesting chip - Bubble Memory Controller. Here's a web page about Bubble Memory Prototype Kit BPK 72 - in japanese 
http://www.st.rim.or.jp/~nkomatsu/evakit/BPK72.html |
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anheier
Joined: 01 Feb 2003
Posts: 182
Location: Richland, WA
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| Posted: Wed Jul 16, 2003 5:49 pm Post subject: |
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Yes, Elar is right. I collect bubble memory too and I have several variations of the controller boards with the Intel and TI bubble memory modules. If anyone has an extra 7220, if would be interest because mine is badly scratched.
Thanks Norm |
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gshv
Joined: 01 Feb 2003
Posts: 7898
Location: Fairfax, VA USA
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| Posted: Wed Jul 16, 2003 6:36 pm Post subject: |
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My mistake. See, how useful is to collect something else besides microprocessors 
Gennadiy |
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the lesser geek
Joined: 19 Apr 2009
Posts: 1
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| Posted: Sun Apr 19, 2009 10:18 pm Post subject: NEC 7220 Advanced CRT Controller |
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the intel 7220 is something i know nothing about however the NEC7220 i do.
The NEC 7220 is a monochrome graphic controller chip very advanced for its time. It has a very advanced set of bitblock transfer, line generating, arc, circle, ellipse, ellipse arc, FILLED ARC, FILLED CIRCLE, FILLED ELLIPSE, FILLED ELLIPTICAL ARC and other many many varied commands. It has the ability to interface very easily with DRAM chips such as video ram, 4464 dram and it was copied or licensed by Hitachi who made the almost exact same set of commands available as a subset of it's HD63484 ACRTC which was a color capable chip. I have a book I purchased in 1985 for the HD63484. This chip is on a board I removed from the cpu section of a gerber router and was in working order when it was removed. 28 pins used on a 50 pin edge connector which looks sorta like an apple card.
NO THIS is NOT a BUBBLE MEMORY controller. this IS a graphic controller. The card I have has an CGA/EGA video connector of nine pins a la the IBM PC and also has four TMS4464-12 120nanosecond memory chips with a 16mhz standard oscillator 'box'. This controller talks to the memory chips via two MC74HC257N chips with i believe either latch or multiplex or both the row and column addresses to the memory chips. Video Dram chips have shift out capabilities for video so THIS IS NOT A BUBBLE MEMORY CONTROLLER. The NEC 7220 is indeed a VIDEO controller extraordinaire for it's day. I wish I had bought a manual for it but they are available.
http://pdf1.alldatasheet.com/datasheet-pdf/view/144378/HITACHI/HD63484.html
was a working link as of 4/2009 |
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jrmunro
Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada
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| Posted: Sun Apr 19, 2009 10:40 pm Post subject: |
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| Wow almost 6 years ago the last post here before today. |
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