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Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... found. Since I had no oscilloscope handy when I built mine ... -
Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…
... viewing of waveforms on an oscilloscope (power on) on the address ... -
Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…
... it's out with the oscilloscope. At this point fault finding ... -
Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …
... ]http://dx.com/p/usb-oscilloscope-and-logic-analyzer-93518[/url ... -
Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …
... ]http://dx.com/p/usb-oscilloscope-and-logic-analyzer-93518[/url ... -
Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …
... ]http://dx.com/p/usb-oscilloscope-and-logic-analyzer-93518[/url ... -
Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... .[/QUOTE]
Whilst an oscilloscope would be very handy at ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... a logic probe or an oscilloscope, it may be possible to ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... a logic probe or an oscilloscope, it may be possible to ... ]
Well I have oscilloscope here. But what should I ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
What test gear do you have apart from a multimeter?
For example, do you have a logic probe or an oscilloscope?
The next step is to do some tests with the system powered on.
[I][B]Mark[/B][/I] -
Floppy music is so last year......these days, using a dot matrix printer as a musical instrument is where it's at :) [youtube]u8I6qt_Z0Cg[/youtube] B
How about a Speccy, some hard drives, a scanner, a printer, and an oscilloscope all playing Radiohead together...
[youtube]pmfHHLfbjNQ[/youtube]
:smile: -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... measured the signals on an oscilloscope, the composite output was at ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
Why was the Speccy screen displaced?Okay, so maybe this has been discussed before but no idea what search terms to look for. I just watched a YouTube video of someone filiming himself …
... someone with a fancy pants oscilloscope with video triggering that can ...Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... . a logic probe or an oscilloscope?
All the causes ... probe or better still, an oscilloscope are better tools for this ...Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... . I certainly cannot afford an oscilloscope on my student budget and ...Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... explaining the results of my oscilloscope investigation and my theories about ... version of TS# on an oscilloscope, the regular groups of 16 ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> You said you have a oscilloscope.
With IC23 fitted, can ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> You said you have a oscilloscope.
With IC23 fitted, can ...DivMMC Enjoy! and interface 1 on ZX+Hi there, I recently obtained the DivMMC Enjoy! and I noticed that it hangs if I plug it in the Interface 1 thru-port of my ZX Spectrum Plus. Conne…
... 48K models with a modern oscilloscope.
There is a lot ...New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... have access to a 10MHz oscilloscope but I'm not sure ...Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…
Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…
... manual. I do have an oscilloscope but I haven't ever ...Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…
... manual. I do have an oscilloscope but I haven't ever ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
Most likely another lower RAM IC is bad. It'll be hard to tell which without an oscilloscope, although if you can post a picture of the display here, we might be able to make an educated guess if there's a visible pattern.
BFixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... to tell which without an oscilloscope, although if you can post ... ]
I have an oscilloscope.Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
Checked upper ram with an oscilloscope and can not find any ...New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... values as I'm an oscilloscope novice :)
[B]Pin ...+2A: issue 1 no sound but better picture than issue 4?Hello everyone. I have a slight problem here and I am trying to figure out what could be wrong. :-( I have two spectrum +2A with two board revision…
... really need access to an oscilloscope to check that the oscillator ...