ZX81+34 - Revision history

Mahjongg: /* Now started on its 2016 successor the ZX81+35 */

2016-04-03T23:09:42Z

Now started on its 2016 successor the ZX81+35

← Older revision		Revision as of 23:09, 3 April 2016
Line 56:		Line 56:

	Due to me unfortunately "blowing up" the original first prototype when first powering it up with the input polarity reversed, and numerous faults/problems found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.		Due to me unfortunately "blowing up" the original first prototype when first powering it up with the input polarity reversed, and numerous faults/problems found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.
	After that decision while working on it I also got some help/input from the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.		After that decision while working on it I also got some help/input from the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com com and http://forum.tlienhard.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.

	In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.		In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.

Mahjongg: /* Now started on its 2016 successor the ZX81+35 */

2016-04-03T23:06:25Z

Now started on its 2016 successor the ZX81+35

← Older revision		Revision as of 23:06, 3 April 2016
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	== Now started on its 2016 successor the ZX81+35 ==		== Now started on its 2016 successor the ZX81+35 ==

	Due to me "blowing up" the original prototype when first powering it up with the input polarity reversed, and numerous faults found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.		Due to me unfortunately "blowing up" the original first prototype when first powering it up with the input polarity reversed, and numerous faults/problems found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.
	After that decision while working on it I also got some help/input from the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.		After that decision while working on it I also got some help/input from the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.

Mahjongg at 15:02, 13 March 2016

2016-03-13T15:02:08Z

← Older revision		Revision as of 15:02, 13 March 2016
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	~~{{Project~~
	~~\|Name= ZX81+35 ZX81 clone~~
	~~\|Picture=ZX81+35 revision 2.2 december 2015 front preview.png~~
	~~\|Omschrijving=My clone of the Sinclair ZX81~~
	~~\|Status= In progress~~
	~~\|Contact=Mahjongg~~
	}}
	==The ZX81+34 ZX81 Clone, and how it came to be==		==The ZX81+34 ZX81 Clone, and how it came to be==

Mahjongg: /* Its working ! */

2016-02-29T01:33:15Z

Its working !

← Older revision		Revision as of 01:33, 29 February 2016
Line 68:		Line 68:

	== Its working ! ==		== Its working ! ==
	On Saturday February 27 2016, I first had a TV picture from my clone!		On Saturday February 27, 2016, I first had a TV picture from my clone!

	read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]		read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]

Mahjongg: /* Now started on its 2016 successor the ZX81+35 */

2016-02-29T01:32:56Z

Now started on its 2016 successor the ZX81+35

← Older revision		Revision as of 01:32, 29 February 2016
Line 63:		Line 63:

	Due to me "blowing up" the original prototype when first powering it up with the input polarity reversed, and numerous faults found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.		Due to me "blowing up" the original prototype when first powering it up with the input polarity reversed, and numerous faults found afterwards, I decided to give up on the first version, and immediately started a much improved second version, I called (logically) the ZX81+35.
	After that decision I also got some help of the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.		After that decision while working on it I also got some help/input from the ZX81 enthusiasts/experts of http://www.sinclairzxworld.com which helped improving the design, and finding some more bugs. In the last days of 2015, during the christmas holidays I managed to layout the ZX-81+35. and now I'm busy with creating the other stuff I need like the BOM, and gerber files, so I can build one.

	In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.		In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.

Mahjongg: /* what now? */

2016-02-29T01:31:07Z

what now?

← Older revision		Revision as of 01:31, 29 February 2016
Line 49:		Line 49:
	In mid April 2014 when I initially wrote this I already had finished the Schematic, and was starting to design the PCB for it, which I then gambled would fit on a 10 x 10 cm dual sided PCB. I tried that because a 10 x 10 cm PCB is often the largest size that extremely cheap (Chinese) PCB manufacturers can handle. Also, I was planning to use a standard Eurocard sized perfboard with 1/10" raster for the hand wired keyboard, using cheap 6x6mm buttons for keys.		In mid April 2014 when I initially wrote this I already had finished the Schematic, and was starting to design the PCB for it, which I then gambled would fit on a 10 x 10 cm dual sided PCB. I tried that because a 10 x 10 cm PCB is often the largest size that extremely cheap (Chinese) PCB manufacturers can handle. Also, I was planning to use a standard Eurocard sized perfboard with 1/10" raster for the hand wired keyboard, using cheap 6x6mm buttons for keys.

	However during early summer of 2014 I had an accident and spent several weeks in hospital because of a bad leg wound, then had to stay at home, (with help). For more than three months I could not drive to RevSpace to work on the ZX14. That was why it became early 2015 before the layout was finished. I also found out that both ZX14 and ZX15 are Yamaha motorcycles. That is why I decided to rename the prototype ZX81+34.		However during early summer of 2014 I had an accident and spent several weeks in hospital because of a bad leg wound, then had to stay at home, (with help). For more than three months I could not drive to RevSpace to work on the ZX14. That was why it became early 2015 before the layout was finished. I also found out that both ZX14 and ZX15 are Yamaha motorcycles. That is why I decided to rename the prototype ZX81+34.

	== Why just 10x10cm (which is very small) ==		== Why just 10x10cm (which is very small) ==

Mahjongg: /* Its working ! */

2016-02-29T01:30:07Z

Its working !

← Older revision		Revision as of 01:30, 29 February 2016
Line 68:		Line 68:

	== Its working ! ==		== Its working ! ==
	on Saturday February 27 2016, I first had a TV picture from my clone!		On Saturday February 27 2016, I first had a TV picture from my clone!

	read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]		read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]

Mahjongg: /* Its working ! */

2016-02-29T01:29:43Z

Its working !

← Older revision		Revision as of 01:29, 29 February 2016
Line 68:		Line 68:

	== Its working ! ==		== Its working ! ==
	on Saturday February 27, I first had a TV picture from my clone!		on Saturday February 27 2016, I first had a TV picture from my clone!

	read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]		read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]

Mahjongg at 01:29, 29 February 2016

2016-02-29T01:29:10Z

← Older revision		Revision as of 01:29, 29 February 2016
Line 67:		Line 67:
	In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.		In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.

	read more about it here: [https://revspace.nl/ZX81+34_ZX81_clone]		== Its working ! ==
			on Saturday February 27, I first had a TV picture from my clone!

			read more about the effort to get it working here: [https://revspace.nl/ZX81+34_ZX81_clone]

Mahjongg: /* Now started on its 2016 successor the ZX81+35 */

2016-02-28T16:01:48Z

Now started on its 2016 successor the ZX81+35

← Older revision		Revision as of 16:01, 28 February 2016
Line 66:		Line 66:

	In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.		In the future I'm planning to also do my own version of the Sinclair spectrum, I will call [[Rhococo]] for "RetroHOmeCOlorCOmputer", it will not really be a spectrum clone, but more an ARM based system using the ideas behind the spectrum. With VGA output.

			read more about it here: [https://revspace.nl/ZX81+34_ZX81_clone]