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Speed (nano seconds) of memory chips ZX SpectrumThe ZX Spectrum uses 4116 memory for the lower memory, which can be replaced by other sorts or a whole, modern, module, but when searching for 4116 m…
... the wired one on the PCB) because half of the RAM ... -
Redesigning the ZX Spectrum 128k - A lifelong dreamHello, I am myPinballs (Jim) and i run a small business here in the uk making replacement 8-bit hardware pcbs for arcade pinball games as well as…
... been working on a clone pcb board for the zx spectrum ... wanted to create a 128k pcb board as i love the ... -
Rolling display from RGB port on a +2Hi gang, after many years I finally decided today to attempt connecting my +2 to my Japanese RGB monitor. Using just the composite video pin only …
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I had a Toobin PCB which runs at 24kHz, and ... -
Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…
... see anything particular on the PCB for the socketed IC22 (which ... ) with another, working, issue 2 PCB.
Replaced an SN74LS157N ... a faulty ULA. The mini-PCB is there, but the IC ... -
Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…
New ZX-Uno english FAQ and ManualHi there, I've been working in an english translation of ZX-Uno Manual,and with the invaluable assistance of 1024MAK - who made a great work forma…
MK14 keyboard replacementI'm the proud owner of a Science of Cambridge MK14! It seems fully functional, but the keyboard is a disaster - some keys don't seem to work at all, …
... match the spacing on the PCB (5mm), [u]if[/u] I ...ZX Speccy +2A - B&W & snowy RF output + other issuesHi All, I am new to this forum and I am back to the Spectrum world after 25 years. Recently I've bought a second hand +2A (+2B board - Z70833 Issu…
... PSU and on the datacoder PCB. - All voltages are stable and ... every point of the main PCB. All transistors checked and working ...Scuba Dive 2 - what could a sequel look like?I watched Rod Bells [url="https://www.youtube.com/watch?v=Mw7Re4j4_i8"]video review[/url] of Scuba Dive a couple of days ago. It's been ages since I'…
... resources to collect, possibly to upgrade diving equipment/boat/weapons and ...Fund raising for new Spectrum hardwareOur friend Djordie Mitic has produced some excellent products for our Spectrum’s over the past months and he is going to continue the trend in making…
Spectrum 48+ 4S - Upper RAM issue, and now a self-created problem!I recently picked up a known-flaky spectrum off eBay, to have a bit of fun fixing it and reliving youth. It was labelled as 'keyboard duff, shows…
... anyone built one of the Harlequin 128k revision 2D boards, with ...My re-creacton of the Z80 8-bit Universal IDEI looked into my draw with various bits & bobs for PC and I found there a CF-IDE adapter, HDD ribbons and two CF cards. So, I was thinking to myself,…
... , IC sockets, pin headers. The PCB had to fit within the ... drew two variants of the PCB:
1. THT variant
PCB makers. The SMD version arrived ... board and the main ZX PCB. I used wrong type of ...What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…
... was intended as a 'serious' upgrade but if that's the ...Just a slight bit of track damage...!!!Just a slight bit of track damage to this PCB... These are pictures of the damaged board after stages one and two of cleaning it. [img]https://c1…
... of track damage to this PCB...
These are pictures ...ComCon interface with an auto-fire joystick is possible?I need a little advice on this one, please! I have a konix speedking, with two fire buttons and auto-fire switch. I can use it with the comcon int…
... pin 5 on the ComCon pcb.
But the ... 7 and 9 on the pcb all linked and they are ... a way to change the pcb in order to get auto ... wires and link them to pcb +5V and ground, essentially separating ... considering cutting the traces on pcb to pin 7 and pin ...Issue 2 problem.Hi all, I'm trying to repair / upgrade an Issue 2 Spectrum for a friend, but have come accros the following problem. When I power the machine …
... /> I'm trying to repair / upgrade an Issue 2 Spectrum for ... 0V as instructed in the upgrade kit.
Anyone know ...Powering the Halequin 128....Hi all, I've just ordered a Harlequin 128, and have been looking at the documentation. Looking at the way it is designed, it looks like it's de…
... /> I've just ordered a Harlequin 128, and have been looking ...wtb: Spectrum and/or Spectrum Plus CaseLooking to buy a Spectrum (rubber key) and a Plus case. I would be interested in a case only, or a non functional machine - don't want to take a wor…
... get a case for my Harlequin project. Would need to be ...Harlequin Rev G AssemblyAre there assembly instructions on the Rev G anywhere? I know there are some component load options wrt PAL vs NTSC on the schematic but I want to m…
Are there assembly instructions on the Rev G anywhere? I know there are some component load options wrt PAL vs NTSC on the schematic but I want to make sure I don't miss anything. I'll be assembling mine as a PAL machine btw, I see no reason these days ...RAM questionI've been meaning to upgrade my desktop pc's ram for ages now as the 4GB it has isn't cutting it anymore but im confused about what ram my motherboar…
I've been meaning to upgrade my desktop pc's ram ...Opus Discovery - copy 170k disks to 800k disksHi guys, I'm new here, and a newbie in the spectrum world. My opus has two disk drive, a pc drive as 1, and the original one as 2. 6116 ram chip a…
... utility that comes with the upgrade kit, trans- express and others ...Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…
New ZX 128K clone PCBhttp://www.sellmyretro.com/offer/details/25385
http://www.sellmyretro.com/offer/details/25385Chrome - ZX Spectrum clone with Italian rootsSome you might know that the Italian ZX Clone been around for a while. The project was started by Mario Prato in 2004 and last year was re-created by…
... around and I bought the PCB earlier this year. I finished ...128 toastrack ROM "upgrade"Hello all As I hate the UK-model menu & editor I would like to replace the original with the (translated) Spanish ROM but can't find any plain image…
Hello all
As I hate the UK-model menu & editor I would like to replace the original with the (translated) Spanish ROM but can't find any plain image. Probably I am just too stupid, but the one on Paul Farrows site works for me in EightyOne only ...Photof**kwit bait and switchI have for many years had an account with Photobucket, because few forums allow uploading of images for use in posts, and those that do have severe r…
... pay them a ransom -- sorry, "upgrade my account", which if I ...Reliving your youthKeep finding myself in a distructive circle. In short form.... Decide to start playing spectrum games every few years. Starts off ok, then I ge…
... second drive and half meg upgrade
Then went on to ...Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... populated a new EEPROM cart PCB for Mega Drive games, but ...Fuse 1.4.1 releasedA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: https://sourceforge.net/projects/fuse-emulato…
... selectors
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Upgrade to libspectrum 1.4.1 ...
