ZX80 Core - new ZX80 motherboards

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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PokeMon
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Re: ZX80 Core - new ZX80 motherboards

Post by PokeMon »

So here a picture of the board with all components.
The video modulator has been added temporarily and works very well.
zx80core_video-modulator_s.jpg
zx80core_video-modulator_s.jpg (125.43 KiB) Viewed 4372 times
So today passed the LOAD and SAVE of audio files.
Works as expected, could LOAD programs and SAVE them and load the saved programs again from PC. ;)
sirmorris
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Re: ZX80 Core - new ZX80 motherboards

Post by sirmorris »

Beautiful work as always, Karl!
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Andy Rea
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Re: ZX80 Core - new ZX80 motherboards

Post by Andy Rea »

Very nice, looks really good, shame I'm not really into the ZX80.

Regards
what's that Smell.... smells like fresh flux and solder fumes...
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PokeMon
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Re: ZX80 Core - new ZX80 motherboards

Post by PokeMon »

It's a ZX81 as well ! :mrgreen:
Even with the NMI generator board and switchable ROMs.
You can switch between ZX80, ZX81, maybe Lambda, ASZMIC.
Or even switch same OS with different fonts.
Or drivers included.

If you put a 64kByte EPROM in it, you can choose between 16 overlapping 4k-16k pages.
You can use 4k ROMs, 8k ROMs, 12k ROMs mixed.
For example you can use a ZX80 ROM, ZX81 ROM and a 4k page for drivers which is accessable from both ZX80 and ZX81 ROM.
Or you put up to 8 charsets in the ROM which can be used either from ZX80 or ZX81 by simply changing the I register with a simple program.

I think some people can heck out some more useful ideas ... 8-)
Last edited by PokeMon on Sun Jun 09, 2013 4:49 pm, edited 1 time in total.
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PokeMon
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Re: ZX80 Core - new ZX80 motherboards

Post by PokeMon »

By the way I maybe plan to make transparent cases for the boards.
Too beautiful to hide it in a simple plastic case, I think. ;)
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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: ZX80 Core - new ZX80 motherboards

Post by 1024MAK »

Like :D
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp

:!: Standby alert :!:
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb :!:
Looking forward to summer later in the year.
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PokeMon
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Re: ZX80 Core - new ZX80 motherboards

Post by PokeMon »

Now have 100% function of the board.
Even the ZX81XRAM over the slot connector works perfect.
Today will try out different other components (RAMs/ROMs), HCT instead of LS, ROM Switching.
And finally will test the NMIX board with NMI generator.


Here some pics of picture (quality) - needs ZX81CCB which is later part of the NMIX board. 8-)
zx80core_live1_s.jpg
zx80core_live1_s.jpg (170.57 KiB) Viewed 4323 times

zx80core_live2_s.jpg
zx80core_live2_s.jpg (251.66 KiB) Viewed 4323 times
sirmorris
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Re: ZX80 Core - new ZX80 motherboards

Post by sirmorris »

I can't wait for mine. Congratulations! And if transparent cases are available... :mrgreen: :mrgreen: :mrgreen:
acsi
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Re: ZX80 Core - new ZX80 motherboards

Post by acsi »

This is looking fantastic.... :o

Can't wait. Can't wait. Can't wait.
wasson65
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Re: ZX80 Core - new ZX80 motherboards

Post by wasson65 »

I'm in for one as soon as they are available - awesome to see these great machines soldiering on into the 21st century.... :D

Hmmm, beowolf cluster....
Timex Sinclair 1000 - Ti994A - Kaypro II - Odessey - Compaq 386 Lunchbox - RLX 324 Bladesystems - MSP430G
K&E 774 Log-log rule - 1910 Burroughs Series I adding machine - decimal and hex abaci
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