-
+3 broken driveHi, I bought a +3 from E-bay, but the drive doesn't work :( I am not so familiar with Speccys, I know how to program them, but this is the first I'…
... drive belt but that made no difference.
When I ... on, there is no seek sound, and the Spectrum effectively hangs.
5v (I really need to check ... on a sudoku game for Spectrum and Amstrad, written in assembler ... -
Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... problems. A Spectrum that has just died with no obvious explanation usually ... />
Pin 1: Should show -5v (MINUS 5 volts)
Pin ...
Pin 9: Should show +5v
- If the voltages ... listed above) you know the Spectrum's internal power supply is ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... turned off after the 5v supply or internal biasing ... what happens, since the +12v/-5v supply ceases).
Spectrum project - not a ULA ... can get "simple switchers", 5v switch mode power supply ICs ... .
[0] no, I've never had a ... -
Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]
... the difference between a 5v XC9572 and a 3. ... I have no problems with the XC9572-XL on the Spectrum, it ... and static RAM that was 5v tolerant, I would also ... use that instead of 5v flash/SRAM - it'd ...
The W5100 should drive 5v circuits; in fact in memory ... -
+2 joystick adaptorHi; I have a +2A and it really doesn't like my kempston joystick interface (given it was designed for the grey +2 I'm not surprised). I am wondering…
... buttons), and so does CPC. Spectrum interfaces didn't support two ... ?
- Where did +5v gone? Not needed, but most ... joysticks used +5v to feed their circuits. Without +5v, no autofire would be ... the ports to force new spectrum users to buy their crappy ... -
Anyone after 4164s...If anyone's after 4164 RAM... ... I'm in Houston at the moment, and EPO has some 4164 RAM in the shop, 100, 150 and 200ns variety, for $1 each. If …
... for myself :-)
[B]Unfortunately, no 4116.[/B]
They also ... />
Winston, both my CZ Spectrum clones have 8*[B]MC4517P15 ... the odd power pins. Just +5V, I think.
... pins' voltages right now (and no datasheets on Google!), will do ... -
Of soldering and whatnot.So. It looks like if I'm going to have any sort of active retrogaming habit in the future, I need to learn a bit more about the nuts and bolts. Emula…
... items:
- A breadboard (no not the thing you slice ... -in resistor for use with 5v circuits.
- Some 555 timer ... of the guts of a Spectrum :-) -
Blown standard divideI recently bought a SIY divide kit from Papaya labs and after i soldered everything, it worked perfectly. I've used it 5-6 times without problems (Fa…
... is only for +12V and -5V and these lines are not ... blown ZTX650 on just one spectrum board i believe is just ... is behaving like it has no rom on it?
So lets examine the "no picture" with the divide on ... -
Spectrum 48K input voltageI have a power supply that is rated 9,5 Volts DC. With no load it outputs about 9,86 Volts. Is it safe to use it for ZX Spectrum 48K? (it can do …
... to use it for ZX Spectrum 48K?
(it can ... The original PSU output 13.5V unloaded. This dropped to 9V ... generate the 12V and -5V supplies for the DRAM and ... maximum current draw) and cause no problems.
From ... them on the +12V/-5V lines. So if you ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... chapter 3 of the Spectrum Hardware manual might help ... of the +12V and -5V power supplies, and page ... extra 5V power supply.
There is no -12V ... />
The original Spectrum 48K power supplies were rated ... be enough. Even the Spectrum +2 came with only ... -
I/O on the Speccy - ideas/help wanted!I'd like an interface for the Spectrum that can control and monitor other items. I have a task in mind that would require: A: 4xbinary inputs (as in…
... , and it'll be no more complex to wire. ... (and the Speccy's 5v rail is quite noisy too ... If you look at my Spectrum diagnostics project, have a ... www.alioth.net/Projects/Spectrum-Diag/Spectrum-Diag-sch.png[/url ... you'll probably crash the Spectrum (or worse, cause ... -
PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... MIC sockets, it should have no effect. Something to do ... by itself requires an internal 5V supply. It uses a ... the 9V supply and the 5V supply to make 12V ... and -5V, in a similar circuit to that of the Spectrum, in ... at about 8.5-10.5V (loaded).
If ... -
PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... the 9V supply and the 5V supply to make 12V and ... -5V, in a similar circuit to that of the Spectrum, in ... at about 8.5-10.5V (loaded).[/QUOTE]
On ... 4116 +12V power pin, with no regulation or CC voltage converter ... -
Problem with Discovery OpusI've just got a Discovery Opus, but it seems to be faulty. When I connect the Speccy and switch it on, it displays the "C 1982 Sinclair Research", …
... interface hasn't blown your Spectrum.
I would take ... Opus with no drives attached) and booting up the Spectrum does this ... connector is giving the correct 5V / 12V levels? (To confirm PSU ... -
Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…
... improove the behaviour for a Spectrum computer or a PC200.
no such jitter appears.
Spectrum +2 - there it results in ... input to ground or to +5V. This way you move the ... -
+3 and amstrad 6128 disk b port compatibility questionAfter having read many web pages, secarica's long text and guesser's ascii-art diagrams for connecting a pc floppy to +3 drive B slot, I found myself…
... -354) on my Spectrum 48k with +D interface. No modification needed, I ... tried one of them on Spectrum +3, switched as DS1. It ... compatible PSU with at least +5V, 1.2A power. -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... in an edgeconnector whilst the spectrum is switched on?
... Rubber Spectrums
[*]My spectrum doesn't crash when divIDE ... press themselves with little or no phsicaly pressure placed on ... board. Feeding the Spectrum with a regulated 8.5V PSU will help ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... 48k+) that works very well -no transformer needed (only for my ... supply work (since the spectrum basically uses 5v coming out of the ... -
Component count/modern replacementsThere is a thread/project for replacing the old memory with simms There is also the ULA replacement. There's DEATH's composite replacement. What els…
... once planned to wire(!) a Spectrum on a 100x80 board. ... /> Power consumption would have been 5V 350mA, allowing battery.
... on Ebay), that this 'mini-Spectrum' therefore would not be so ... ram contention), and there is no garantee that 16K compatibility would ... -
Issue 2 Spectrum overheating keyboard membraneI think I have an issue 2 ZX Spectrum. I don't want to take it apart again as I had problems replacing the keyboard membrane. With Interface 1 conne…
... help.
c) The Spectrum's internal cooling plate is ... keep internal regulator happy, but no more.
2) Replace ... : hook up regulated +5V directly to Spectrum internals (through edge connector ... rather avoid opening up your Spectrum again. You have probably ... -
Using a Spectrum in JapanHi all, at the moment I have a 48k Spectrum on its way (with a LOT of other stuff) to Japan where I intend to use it. So I have some fairly straight…
... that's fine. AFAIK a Spectrum 48K in unmodified state uses ... the Spectrum). So for example a [I]regulated[/I] 7.5V supply ... DC plug is + on my Spectrum power supply.
[QUOTE ... SCART connector, no TV tuning needed). On the Spectrum you basically take ... -
Issue 1 80K SpectrumHere's the other Spectrum I acquired last weekend. It's an [URL="http://www.drumfu.com/Issue1.jpg"]Issue 1[/URL] with an [URL="http://www.worldofspec…
...
[QUOTE=acsi;340154]No modulator? Video out?[/QUOTE]
A normal Spectrum aerial lead will work OK ... set the voltage at 7.5V - which works like a charm ... -
Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…
... replacing TR4 and TR5 the -5V came back, but the 12V ... screen, nothing happening", or a "no video signal generated". The first ... (known working! preferably same issue) Spectrum, and see if that works ... (working) ULA from that other Spectrum, and plug it in your ... -
RGB-Output (interface) for rubber 48k / Spectrum+I wonder if there is interest for a small RGB-interface for the rubber 48 k / Spectrum+. I developed a schematic using a very small number of parts.…
... for the rubber 48 k / Spectrum+. I developed a schematic using ... lines from the computer (9V,5V,composite, /Y,/U,/V,GND ... so on. If it has no throughout bus it might be ... from my rubber-keyed 48K Spectrum into a VGA monitor.
Kempston Interface - Versatile?Is the Kempston Joystick Interface versatile in the meaning that it can accommodate other types of controllers instead of just a Sinclair-based joyst…
... could crash the Spectrum.
There was no standard for a ... , and some Spectrum (Kempston) joystick interfaces would output +5V power on one ... pressed that button it connect +5V to ground and shorted out ...Black screen of deathI recently aquired a zx spectrum (revision 3b) of the rubber key variety. it was all running smoothly(for about an hour after pluggin in), i left the…
In general "no video but keyclicks" suggests absence of 12V.
This voltage is generated inside the Spectrum, together with -5V for lower memory. Absence of these voltages might (will) damage lower memory.Black screen of deathI recently aquired a zx spectrum (revision 3b) of the rubber key variety. it was all running smoothly(for about an hour after pluggin in), i left the…
[QUOTE=roko;363128]In general "no video but keyclicks" suggests absence ... is generated inside the Spectrum, together with -5V for lower memory. Absence ...Casing For Divide 57cHi all, Can anybody advise me on a suitable case to mount the Divide 57c interface into? Original interface designer I e-mailed some time back, he …
... =velesoft;367394]Must be connect +5V from IDE connector to power ... takes power off of the Spectrum edge connector on his interface ... ... ?
[QUOTE=velesoft;367394]No, work all SD cards up ...RGB-Output (interface) for rubber 48k / Spectrum+I wonder if there is interest for a small RGB-interface for the rubber 48 k / Spectrum+. I developed a schematic using a very small number of parts.…
... the rubber 48 k / Spectrum+. I developed a schematic using ... lines from the computer (9V,5V,composite, /Y,/U,/V, ... on. If it has no throughout bus it might be ... />
I use two Spectrum+. I also did this mod ...
(only the composite mod. No S-Video mod in my ...Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …
... /> [URL="http://bildr.no/view/454643"][IMG]http://bildr ... .no/thumb/454643.jpeg[/IMG ... your Spectrum doesn't have +12v or -5v used ... />
Without this signal, spectrum can't start ( it can ... the video ram where spectrum put some information) ...
