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New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... hole parts. In quantities of 1, you can get a 160x100mm ... Sinclair's "Pandora" concept - a battery powered portable unit, with the ... -
Making your own joystick interfaceJust spied the diagram for the kempston joystick interface in the docs section. For someone who has only made up cables, what is involved in constru…
... &Ntk=I18NAll&Nty=1&Ntt=optrex&Dx ... be run from a single 5v supply (Vee is from 0v ... to 5v - use a pot between Vcc ... the backlight to run off 5v. Some LCDs you'll notice ... for Vee, so the 0v-5v range was a major selling ... -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... ), and operate normally when high (5v, LOGIC 1) -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... for high for logic 1 which is 5V
It really ... to the appropriate 0v or 5v power line (or through say ... -
Composite vs SCARTIs there a significant difference from using AV composite video and RGB SCART video? I have played various games with composite, then on RGB, and th…
... +12V is present on Pin 1 and 5 of video socket ... /> And if you supply only +5V or 6V on SCART pin ... -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... t correct. Logic 1 may well be on (+5v in the case ... logic 0 and 1 (i.e. 0v and +5v, electrically). The ... signal is neither tied to +5v or 0v by the output ... a conductive path from the +5v line to the chip's ... to make logic 1, a path is connected to +5v. Except with ... -
Spectrum 128 loading volumeToday I recieved my 128k haetsink spectrum, what i noticed is that it needs even higher sound volume for loading through tape than the 48k+. To be mo…
... up and down by around +/- 5V ~, and therefore, most stuff that ... is just a train of 5V pulses, some longer than the ... others (a "1" for long pulse, "0" for ... -
Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
Right, i just wanted to confirm it.
Why are the resistor and the diode necessary.... also i can se a green wire conecting pin 1 and 28 together, this is probably for the +5V. -
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…
... pins:
Pin 1: Should show -5v (MINUS 5 volts)
Pin 9: Should show +5v
- If the voltages ... -
Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
Pin 1 of IC6 should be -5V.
That is almost ... all the proper voltages except -5V, then it should be D16 ... -
Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
[QUOTE=DEATH;202517]Pin 1 of IC6 should be -5V.
That ... all the proper voltages except -5V, then it should be D16 ... -
Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…
... .
1 Epson SMD-380 This is a +5V
2 Citizen OSDA-20E also +5V
They as far ... -
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…
... other than checking my car battery was in 1993!) then it ... , I must be his number 1 customer for IC sockets :) -
Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
... know the functions of pins #1 and #27 in a FLASH ... itself. There are 12V and 5V flashes. Both have WR pin ... -
spectrum PSU'sI've read contradictory info on which psu(ie amp rating) is for which spectrum. :confused: The models and amp ratings are 1.2A, 1.4, 1.85 and 48k, …
... of current. Lets use the 1.85A one as an example ... is 9V when you take 1.85A from it - if you ... , which are +12V, -12V and -5V. These voltages go off to ... -
ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…
... power adapter" and use 7.5V output voltage.
- it's ... (80%)
- Reguled output
- 1.5A~2.0A
- weight ... -
Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... -bit device compared to the 1-bit data buses of the ... /> Connect the two top pins (1 and 18 ), and connect them ... 10). This ties A7 to +5V converting a 64kx4 into a ... -
Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... -bit device compared to the 1-bit data buses of the ... /> Connect the two top pins (1 and 18 ), and connect them ... 10). This ties A7 to +5V converting a 64kx4 into a ... -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... to make all internal voltages (5V and 12V). Of course you ... will not work ofcourse (Interface-1 ?). It's not 100% safe ... -
7 to 9" TFT screen on SpectrumI'm willing to buy one of those and connect the Spectrum via the Composite Video input. Has anyone tried that? What kind of image quality may be expe…
... was the one in photos 1 and 4), but it was ... control when I stuck the battery in upside down - and not ... &qid=1188509226&sr=1-109]JEJA 8.0" LCD ... -
7 to 9" TFT screen on SpectrumI'm willing to buy one of those and connect the Spectrum via the Composite Video input. Has anyone tried that? What kind of image quality may be expe…
... was the one in photos 1 and 4), but it was ... control when I stuck the battery in upside down - and not ... &qid=1188509226&sr=1-109"]JEJA 8.0" LCD ... -
ZX Spectrum Power Cable on +2AHi, Today I bought a +2A, but it is lacking a power cable. I rooted around and found one, but it is for an ordinary ZX Spectrum. Will it work? This…
... happy with +9v and 1.4 to 1.6A, but 128K models ... and silicon. 2A on the 5V line and 1A on the ... -
Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…
... the output goes to logic 1. When the lower input ... are connected via resistors to +5v (logic 1).
Firstly, ... to switch rapidly between 1 and 0 until the ... NMI line tied to +5v through a resistor, to ... a 100K resistor between +5V and NMI in addtion to ... -
So what do you think of Death Pit?Now that it's been released!
... mean you "started the last battery" ... you need to activate it ... you only carrying 1?...carry 2...my 1st battery was at like ... 1 or 2% when I ... nothing but with a full battery...get it? -
So what do you think of Death Pit?Now that it's been released!
... you only carrying 1?...carry 2...my 1st battery was at like ... 1 or 2% when I ... nothing but with a full battery...get it?[/quote]
What was the worst game you brought ?Only games you paid for please :) Myself i think it was Alien Kill (Mastertronic) Apologies if the author is on here :oops: But even at the time…
... or whatever that was only 1 Meg, then within a month ... doubled up as an external battery backup system and a converter ...Any Speccy Emulators for PSP?I was wondering if there was a decent Speccy emulator for the PSP, I have tried zx4all & PSpectrum but neither seems to work. Can anybody recommend …
... dodgy and involves a spare battery I believe.[/QUOTE]
Yep the so called "pandoras" battery but there are easier methods ... for is either the old 1.50 or an unofficial custom ...ZX Spectrum +2 RGB to CGA (RGBI) MonitorI just picked up a spanking brand new Goldstar 1410-CGA with RGBI. It has a 9 pin "D" type connector. 1 Ground 2 Ground 3 Red 4 Green 5 Blue 6 Inte…
... . With diodes and resistors, the "1" value will be very low ... /> I corrected the schematic - only 1 resistor is neccessary (this then ... really 0 and not really 5V but in original schematic the ...Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…
First thing to check is -5V, +5V and +12V lines on the ... ). As it's an issue 1 please be careful, there's ...Found ancient laptopI've come into possession of a 1984 HP-110 Laptop, complete with 3.5inch external drive and contempory printer and all the manuals and leads and its …
... .com/museum/computer.asp?st=1&c=945[/url] - such ... screen for its time, good battery life (FAR superior to a ... machine. But it had good battery life, and I remember using ...
