My 1000 is on its way OHIO
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- Joined: Sat Oct 07, 2017 2:04 am
My 1000 is on its way OHIO
Hi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80" So one thing led to another and I ordered a 20 dollar 1000 on Ebay to mess around with. One of the classes I assist in is an electrical engineering class so I will have some support. Particularly interested in adding some inputs and out puts and burning a ROM. Perhaps create a breadboard that automatically displays the voltage on the screen for each row using a lot of multiplexers.
Re: My 1000 is on its way OHIO
Howdy from Texas!
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
Re: My 1000 is on its way OHIO
Welcome aboard!
Re: My 1000 is on its way OHIO
If you want a really great book about how a cpu, ram and rom is working down to every 1 and 0 you can get the book But How Do It Know?. This book gave me the great Aha!Gregg Evans wrote: ↑Sat Oct 07, 2017 2:14 amHi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80"
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- Joined: Sat Nov 26, 2016 2:42 am
Re: My 1000 is on its way OHIO
I have just ordered a copy of that book!mrtinb wrote: ↑Sat Oct 07, 2017 11:41 amIf you want a really great book about how a cpu, ram and rom is working down to every 1 and 0 you can get the book But How Do It Know?. This book gave me the great Aha!Gregg Evans wrote: ↑Sat Oct 07, 2017 2:14 amHi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80"
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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- Posts: 10
- Joined: Sat Oct 07, 2017 2:04 am
Re: My 1000 is on its way OHIO
Thanks for the lead. Google play has a decent size sample of this book so I am going to really check it out.mrtinb wrote: ↑Sat Oct 07, 2017 11:41 amIf you want a really great book about how a cpu, ram and rom is working down to every 1 and 0 you can get the book But How Do It Know?. This book gave me the great Aha!Gregg Evans wrote: ↑Sat Oct 07, 2017 2:14 amHi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80"
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- Posts: 10
- Joined: Sat Oct 07, 2017 2:04 am
Re: My 1000 is on its way OHIO
So Bummer, my 1000 arrived and it is not putting out a video signal ( at least I think.) I didn't have a TV so I bypassed the modulator by soldering to the USA line into the modulator and to the ground. then connected it to a tested composite B&W monitor. I tested the power supply and the little doodad that converts it to 5V. they both work (I know the keyboard is completely disconnected but that should be easy.)
I'm sure this comes up all the time but could some one please direct me to a thread about systematic testing of the computer?
I'm sure this comes up all the time but could some one please direct me to a thread about systematic testing of the computer?
Re: My 1000 is on its way OHIO
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
Re: My 1000 is on its way OHIO
Hi from a neighbor in northwestern Pennsylvania
2X Timex Sinclair 1000, ZX81, ZX80Core, 5X 16K Ram Pack, ZXBlast, ZX P file to Ear Input Signal Converter, Elf II
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- Joined: Sat Oct 07, 2017 2:04 am
Re: My 1000 is on its way OHIO
Yes I can make that. I made a little progress today. There seems to be 2 labels on the board that say USA before it goes to the modulator One was kind of hiding. So I tried that line out (the one farthest to the left) because the oscilloscope showed a more convincing pattern. When I went from that line I got no text but I did get very thin black and white vertical lines. I will try this video circuit you linked to if there is a chance it will fix it. Thanks