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molka
Joined: 17 Mar 2011
Posts: 2416
Location: Budapest, Hungary
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 Posted: Mon Jul 28, 2014 6:01 am Post subject: molka's home made MCS-80 test-board |
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One of my favorite CPU is i8080. Because there are rather few possibilities for checking they working condition, I decided to develop a small, simple test-board for testing this kind of CPUs.
Now it is done. It is a bit similar to lhf_james’s 4004 test-board.
It requires a single +5V power supply trough a mini-USB connector. Can be powered by a cell-phone charger or PC’s USB port.
It consists of the base parts of MCS-80 system: a i8224 clock generator and an i8228 bus controller and a 40-pin ZIF socket for easy change of the 8080 CPU.
It has 8 LEDs as output and 4 push-buttons as input devices. An i2716 EPROM holds a small program that reads the button’s state and flashes the LEDs accordingly for checking the working condition of the inserted CPU.
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My collection
http://www.x86-guide.net/molka/en/collection.html |
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molka
Joined: 17 Mar 2011
Posts: 2416
Location: Budapest, Hungary
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| Posted: Mon Jul 28, 2014 6:01 am Post subject: |
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I already soldered 3 pieces. One is sent to CPUShack, an other is reserved for Mixeur and I keep the third. lol
But I have a few empty PCBs, so if there are interest I can solder them in some days for sale. They will contain all components (including CPU – Tungsram 8080APC or Intel P8080A-1) to be ready to work.
They cost $48 each + shipping on cost.
New v2.1 firmware is attached. 01.22.2015
It fixes the cosmetics problem evaluating i8085 CPUs with the expansion board.
- The i8085 CPU divides the clock by two, therefore all LED animations will take twice as long to complete - it is fixed now.
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My collection
http://www.x86-guide.net/molka/en/collection.html
Last edited by molka on Thu Jan 22, 2015 2:32 pm; edited 6 times in total |
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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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| Posted: Mon Jul 28, 2014 6:04 am Post subject: |
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one for me please with Tungsram 8080APC
thanks
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Wanted: 4 x VT-25-A tubes |
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xsecret
Joined: 01 Feb 2004
Posts: 1847
Location: France
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sandman
Joined: 21 Mar 2011
Posts: 41
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| Posted: Mon Jul 28, 2014 7:04 am Post subject: |
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One for me please (with P8080A).
Thanks! |
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Komz
Joined: 02 Feb 2003
Posts: 370
Location: PL
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frag_
Joined: 17 Nov 2008
Posts: 4015
Location: Estonia
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| Posted: Mon Jul 28, 2014 7:11 am Post subject: |
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Cool!
Want one too! |
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Qwerty
Joined: 20 May 2005
Posts: 3141
Location: Germany
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| Posted: Mon Jul 28, 2014 8:04 am Post subject: |
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| I'm also interested in one! |
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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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| Posted: Mon Jul 28, 2014 9:27 am Post subject: |
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very impressive
i am also interested in one |
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Tegranphos
Joined: 04 Oct 2009
Posts: 806
Location: Navarra - Spain
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cooperalp
Joined: 14 Feb 2009
Posts: 688
Location: Alberta
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| Posted: Mon Jul 28, 2014 9:47 am Post subject: |
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| I would like to have one as well. |
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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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| Posted: Mon Jul 28, 2014 11:04 am Post subject: |
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| too late for one? |
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Marcin
Joined: 02 Jan 2005
Posts: 8519
Location: Poland
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Chook
Joined: 29 Oct 2008
Posts: 2250
Location: Australia
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| Posted: Mon Jul 28, 2014 11:16 am Post subject: |
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That is an awesome project. I would be interested in one if you have more made.
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General failure reading disk in drive A
Who's General Failure and why is he reading my disk? |
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Mon Jul 28, 2014 11:35 am Post subject: |
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However late I am add me. I want to support your fantastic work as well.
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You may use the photos I have posted here under CC BY-NC-SA license. |
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