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External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…
Aha, the edge connector clock needs inverting with a transistor (see ZX Spectrum schematic) and a low value pull-up resistor.
[b][i]Mark[/i][/b] -
NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... a Spectrum, the twister board fixes that so you can plug ZX Spectrum peripherals ... a new version twister board WITH the zx spectrum emulator rom built in ... -TS2068-New-Version-with-ZX-Spectrum-Emulator-on-Board-/121794234115?hash=item1c5b808703:g ... -
Emulator AY/YM sound chip on AVR (ATMega8,ATmega16,ATmega32,ATmega8515).[url]http://zx.pk.ru/showthread.php?t=10510[/url] Latest version - [url]http://www.vector06c.narod.ru/emul.html[/url] (last link) P.S. Emulator bas…
... /> - http://picosong.com/HUGM/ (Xenon / Spectrum)
- http://picosong.com/wseMn ... creation, for zx spectrum)
In addition, this board features:
ZX Spectrum sound engines, a clever work ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... Attempt on Issue 6A ZX Spectrum+.
The first Issue 6a Spectrum+ I got ... -
Spectrum USB KeyboardI know you can buy these but how do you make one . What I am thinking of be similar to the type described in Issue 1352 of Micro Mart at page 45 .The…
... inferred from his review "ZX Spectrum 48k USB" (Issue 1352 , page 45 Micromart ... at the time in MicroMart issue 1352 page 45 where he ... Spectaculator , you can use the Spectrum keyboard in the same way ... -
The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…
... not mounted on a circuit board with other components are at ... are mounted on a circuit board with other components, they are ... parts, the edges of the board) or only touching metal parts ... precautions, if a ZX Spectrum, ZX80, ZX81, QL board is complete without any ... -
Spectrum +2 (grey) RAM issueHi, I?ve got a ZX Spectrum +2 (grey) with what I think is a RAM issue. I used to be able to load games very reliably by playing converted TAPs and …
... a ZX Spectrum +2 (grey) with what I think is a RAM issue ... with an R Tape Loading Error. I quickly got fed up ... same time? It's an Issue 3 PCB.
[I ... being incorrectly mounted on the Issue 3 PCB. I can't ... it being remedied on my board but I don't see ... -
ZX Spectrum 48K firmwareCan somebody tell me in which IC the firmware is located. I mean which IC holds the "Error Codes" ? I have a Spectrum which give the Error Codes in s…
... /> I have a Spectrum which give the Error Codes in spanish - and ... to english. The PCB board is a 1983 Issue 4A.
Regards ... -
FLASH EPROM programming on ZX SpectrumThis is photo of Winston's DIAGNOSTIC BOARD: [img]http://velesoft.speccy.cz/other/diagboard.jpg[/img] Schematic and flash utilities: [url]http://www…
... of Winston's DIAGNOSTIC BOARD:
[img]http ... Schematic and flash utilities:
[url]http://www.alioth.net/Projects/Spectrum ... 8bit.yarek.pl/upgrade/zx.flashd0/index.html[/ ... img]http://velesoft.speccy.cz/zx/divide/divide_plus/divide_plus_complette.jpg[/ ... -
ZX Spectrum 48K,issue two - can't get it repairedI have an issue 2, which has some weird very small PCB hanging over the Z80. Some wire go to various places on the big PCB, two go to connections 36 …
I have an issue 2, which has some weird ... 'm using Winston's diag board, it tells me that some ... end it pages in the Spectrum ROM, but it's illegible ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... to find a couple of ZX Spectrums at a car ... evening fiddling about with one (issue 2) and thats now ...
The second is an issue 3b. I am willing to ... when I turn on this spectrum, the copyright screen comes on ... if this is a power issue? Its like it is ... -
Issue 1 ZX Spectrum 48K boardI got a 48K Issue 1 board to repair for a friend. Didn't want keep this thrill to myself (click for magnification): [URL="http://benophetinternet.n…
I got a 48K Issue 1 board to repair for a friend.< ... -
Spectrum 48k Issue 4S?I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I a…
I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I am curious in what way it differs, as there are no schematic for issue 4S on this site. -
48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... /> Growing up I had a zx spectrum for a little bit, and ... have bought a working 48k + Spectrum (Issue 4). I wasnt sure if ... is an image of the board itself.
[IMG]http ... -
Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... i got some ZX Spectrum stuff.
Also 2 ZX Spectrum 48K's, ... m still a rookie at ZX Spectrum hardware ;)
Mayby ...
ZX Spectrum 48k orginal case:
It is a ISSUE 2 board, with ... My working ZX Spectrum 48k works great, so those 2 board are broken ... -
ZX Spectrum 48K board Issue Two - spider modI have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted. [URL="http://www.a…
I have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted.
[URL="http://www.amibay.com/showthread.php?t=57438"]http://www.amibay.com/showthread.php?t=57438[/URL] -
Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... on page 30 of the ZX Spectrum 48K service manual. They all ... correct ULA for that board.
All issue one boards are ... earlier.
Issue two is the board with the widest range ... to check which version your Issue two board is configured for is ... -
Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
... that my Issue 3B rubber keyed Speccy contains a memory error.
Issue 3B Schematic along with [url=http ... /section1.html]The Lil Old ZX Spectrum 48k Service Manual[/url] and ... such a chip from the board? (Special Equipment?)
2) Can ... -
ZX PC InterfaceZX <-> PC Interface Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Installation 2.1) The softwa…
... your
ZX Spectrum like all interfaces designed for the ZX Spectrum.
... commands are available on the ZX Spectrum when
the ... -file will generate a LOAD-error.
PRINT ... This is not a real schematic, but the connections on ... -
Spectrum board Issue numbersWhilst cataloging my spectrums I am documenting the issue numbers of the motherboards. so far I have (all spectrum or smegtrum + Issue TWO 3 3B …
... issue numbers of the motherboards.
so far I have (all spectrum ... or smegtrum +
Issue TWO
3 ... there ever an issue 1 and an issue 4 or 5A.
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) ??? I'm doing a lot of research into the ULA and also the reasoning …
Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E ... seen for instance in the ZX Spectrum Service Manual) for what will ... - this is a memory refresh issue.
Tracking down people ... with Issue 1 or 2 machines is ...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…
I think I have an issue 2 ZX Spectrum. I don't want to ... missing.
The issue 2 Spectrum has the heatsink under the ... . Is this problem common to issue 2 Spectrums with Interface 1 ...Spectrum 128k +2b helpCan anybody help me. When i switch my spectrum on the screen is like a chess board with bits flashing. Any ideas anybody. The make is a zx spectru…
... switch my spectrum on the screen is like a chess board with ... make is a zx spectrum 128k +2b board type z70833 issue 2 by amstrad ...New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... project of internal interface for ZX Spectrum 128+2:
([ ... PROFI INTERFACE FOR ZX128+2 (ISSUE 3 ONLY)
512kB- ... bot.jpg[/IMG]
New board is redesigned and contain only ... compatibilty with all popular russian ZX CLONES
- russian CACHE ...Micro Command - voice recognition for the ZX SpectrumIt's an interface you might know about. This is it: [img]http://www.zxprojects.com/images/stories/microcommand/microcommand.jpg[/img] I've found som…
... be directly accesible to the Spectrum, but I don't know ... the CLK signal on the Spectrum, and had to add a ... generation circuit on a separate board. The crystal is a 4MHz ... like to know if an schematic of this exists somewhere. As ...Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …
There appears to be an error in the Schematic for the 128k +2A ... and +3
the error ... looking at my +3's board I noticed a weird circuit ...ZX-Mobile. A new Spectrum emulator for iOS and WP7Hi All, I?m excited to announce the release of ZX-Mobile, a new ZX Spectrum emulator for iOS and Windows Phone 7. The 48K emulator was written in .…
... the release of ZX-Mobile, a new ZX Spectrum emulator for iOS ... will get a Tape Loading Error :)
[*]High performance applications ... ve been contacted other Spanish Spectrum games authors to use ... itunes.apple.com/us/app/zx-west-bank/id451796188"]http:// ...Spectrum 48K - upper memory MIAI have recently acquired a ZX Spectrum which, according to the sticker on the bottom, should be a 48K model. It's an Issue 3 board, with upper memory…
I have recently acquired a ZX Spectrum which, according to the sticker ... 48K model. It's an Issue 3 board, with upper memory chips ...Looking to buy ZX Spectrum 48k issue 3+, Spectrum + or 128KI am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. T…
I am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. The caveat is that it needs to be shipped to sweden, if you are willing to do this?
/JohanFor sale: ZX Spectrum 48K Issue 4SI have a fully restored (and with all chips socketed) ZX 48K Issue 4S, that I am told is a bit of a rarity, that I am willing to sell. Dont know what…
... with all chips socketed) ZX 48K Issue 4S, that I am told ...
