Home » RBC Forums » General Discussion » Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
| Simple80, a low-cost, glue-less CP/M Ready Z80 SBC [message #6319] |
Sat, 18 May 2019 21:35  |
plasmo
Messages: 916
Registered: March 2017
Location: New Mexico, USA
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This is yet another Z80 SBC. It is inspired by my observation that several eBay vendors are offering homebrew kits quite cheaply. The one that got my attention is this eBay item: https://www.ebay.com/itm/Z80-CPU-PIO-Kit-Z84C0020PEC-Z84C400 6PEC-HM628128-W27C512-74LS32-74HC00-74HC138/113067844658 which is a Z80/SIO/RAM/ROM kit with few TTL logic for $6.99. I bought the kit only to realize the seller had made a mistake and sent me a PIO instead of a SIO-0. Other than that, all the parts are functional. I communicated with the seller and worked out a even simpler and cheaper Z80 kit, https://www.ebay.com/itm/Simple80-Z80-CPU-SIO-Homebrew-IC-Ki t/113735638336 for $6. Bought two kits and designed the Simple80 as documented here: https://www.retrobrewcomputers.org/doku.php?id=builderpages: plasmo:simple80
What I want to achieve is a low cost Z80 SBC that's CP/M ready and with expansion buses. My experiences with buying parts on eBay have been generally favorable and I believe functioning, low-cost Z80 kits can be found on eBay such that a CP/M-ready Z80 should be possible for about $20 of part cost.
Received the kits today. Plug them into Simple80, both kits work fine. Cost breakdown:
* Simple80 Z80 Kit, $6 + $6 shipping,
* 7.37MHz oscillator $1,
* IDE44 adapter $2 (free shipping),
* PC boards from JLCPCB $14 (economy shipping) for 5 boards or $3 per set of boards,
* CF disk $2,
* Resistors, capacitors, connectors, IC sockets $??
$20 seems an achievable goal.
Bill
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Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sat, 18 May 2019 21:35 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sun, 19 May 2019 18:22 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Mon, 20 May 2019 16:37 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sat, 06 July 2019 04:45 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sat, 06 July 2019 12:54 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Tue, 15 October 2019 04:40 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sun, 20 October 2019 08:59 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sun, 20 October 2019 15:30 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sun, 20 October 2019 16:08 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Mon, 21 October 2019 04:07 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Mon, 21 October 2019 11:56 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Tue, 22 October 2019 03:35 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Tue, 22 October 2019 19:12 |
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Re: Simple80, a low-cost, glue-less CP/M Ready Z80 SBC
By: plasmo on Sat, 09 October 2021 17:56 |
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