Super ZX80

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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nollkolltroll
Posts: 325
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Super ZX80

Post by nollkolltroll »

I just did the first test on using an 8MHz crystal on my Minstrel ZX80 clone. Inspired by https://hackaday.io/project/28963/galle ... b09145c1a8
With 3 bytes changed in the ROM, it worked just as I wanted. Giving 32 characters, but compressed to the left with room for 12 more characters. Next up will be to mod the ROM even further so that BASIC uses all the extra screen real estate.
Of course, the ZX80 is now 23% faster :D
/Adam
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gammaray
Posts: 590
Joined: Sun Apr 17, 2016 2:44 am
Location: Texas

Re: Super ZX80

Post by gammaray »

I am impressed again!
5-TS1000,UK ZX81<-Sheelagh, US ZX81, 2-TS1500/KDLX , 3-TS2040 printer, 2-TS2020 cassette decks, ZXPAND+AY, ZeddyNET, ZXBlast, UDG, ZX8CCB, AERCO, BUILDS/REPAIRS ZX Spectrum, ZX80 Minstrel, ZXMAX48 v1 v2, 2-TS-2068, ROM, 16kRAM
nollkolltroll
Posts: 325
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: Super ZX80

Post by nollkolltroll »

Did some updating of the ROM, found something to fix in SCROLL-routine. Seems to work properly now.
ZX80 44 characters.jpg
ZX80 44 characters.jpg (34 KiB) Viewed 2893 times
/Adam
Shaun_B
Posts: 474
Joined: Wed Apr 22, 2009 10:22 am

Re: Super ZX80

Post by Shaun_B »

Cool - I might buy another Minstrel clone to experiment. Super ZX80 sounds good to me :-)

Regards,

Shaun.
nollkolltroll
Posts: 325
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: Super ZX80

Post by nollkolltroll »

Shaun, not trying to dissuade you from getting more stuff, but if you already have a Minstrel the only thing you need is a way to swap crystals (I use machined socket pins) and an (E)EPROM. Not a very risky mod to undertake, and VERY fast to return to original.
/Adam
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