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Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... the power supply and the voltages on the lower ram chips ... -
Chaosmongers has a big rant.Just received this Cronosoft related email today:....... [quote] >Hello, >I enjoy the idea of releasing new games for older platforms but... >I h…
... >new colours of the palette of 256. ZXSpin 0.7 ... can easily >create a palette and save it as a ... >new colours of the palette of 256. ZXSpin 0.7 ... can easily >create a palette and save it as a ... -
Experiments mixing ULA+ and Timex Hicolour featuresI'm trying to improve my Verilog skills, so I've written a description of a complete ZX Spectrum 128K (+2 grey ROMs), with AY-3-8912. I wanted to add…
... used to implement the ULA+ palette registers.
I've ... previous one, with the previous palette, and when the loading has ... finished, the new palette is appled (it's slow ... -
No colour after changing LM1889NI replaced the faulty LM1889N in my issue 2 spectrum, since I had a very yellow picture, and soldered a socket to put the new LM1889N into, however, …
... and VR2 to get the voltages right. I can not check ... -
Misbehaving 128K toastrackI acquired a toastrack some time ago off ebay and it worked just nice up until recently. It arrived with no PSU or cables so I paired it with a grey …
... service manual and measured some voltages which all seem within working ... -
Intermittent reset on 48K (issue 4S)I'be been fighting an intermittent selfreset the whole day. Changed ULA - did not help. Tested TR6 as i could and compared the reading with another…
... is about .6A
All voltages checked - all fine.
Looked ... -
zx 48k ribbon cables slotOne more question regarding the zx 48k: the other 48K i have, and this one is working fine, i had to open it compare the voltages with a broken one..…
... to open it compare the voltages with a broken one.... and ... -
ULAPlus: showing different screen modes in one screenI wanted to write a demo showing the same screen, converted to various screen modes available on the Spectrum (well, a Spectrum clone capable of show…
... attributes using the Spectrum standard palette). The third one is ... res attributes with 64 colour palette), and the fourth block ... Timex HiColour screen with ULA+ palette enabled.
Each ... border colour uses whatever colour palette is asigned to CLUT ... -
Faulty Grey Spectrum +2 - help neededI have a faulty spectrum +2. I tested the voltaged inside - all check fine. Well, within some limit, +5 for example is 4.83, but all other voltages a…
... 4.83, but all other voltages are present.
I ... is okay, CPU is okay, voltages are fine. What's left ... -
OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... ERASE (reset the default ULAplus palette), FORMAT (set the permanent attribute ... ), ON ERROR (error trapping), PALETTE (switch 64-colour mode on ... or off and set the palette), RENUM (renumber the program), ... ERASE command to set the palette. The UDGs are also ... -
ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…
... .uk/ZX80_ZX81/forums/composite-mod-voltages-t622s20.html-sid=84097263317ce0c752d9e0f76f020a15[/url ... -
Anatomy of a bad M1No, not the motorway (although at times the tarmac M1 goes about as well as this one...) But the bad M1 problem that seems to occur most with issue …
... to DC so the the voltages reached (high and low) by ... -
48K and wavy lines.It seems all Spectrum related things are breaking here at casa de Don Pedro. After the problem with my old ZX81, I went over to my issue 2 ZX Spectru…
... at hand? I checked the voltages at TR1 and TR2 and ... -
SpecBAS 0.749 Now available!Ey oop, you lot! A new SpecBAS has now been uploaded to the usual place - [url]http://www.specbas.co.uk/[/url] For your delight and delectation. …
... nice effect when combined with palette cycling:
[youtube]qtJj5rSFTMg ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... external SRAM to store the palette. Of course, you can argue ... -
Lower Memory - Why Multiple Voltages?Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic. Given…
Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic.
Given that the upper RAM in a Spectrum is of type 3732 - which only has a supply voltage of +5V, why ... -
Help me resurrecting a 128KHello to everybody. I'm really struggling along a repair of a standard 128K a friend of mine handed me over some (ok, actually a lot of) time ago. A…
... , ROM and PAL without luck. Voltages are well within tolerances and ... -
Heartland - Max Bounty[img]http://zx.maros.pri.ee/zxscreen/border/0/palette/pulsar/mode/mix/type/hidden/id/13662[/img] Max Bounty is not mentioned as author of code? Is it…
[img]http://zx.maros.pri.ee/zxscreen/border/0/palette/pulsar/mode/mix/type/hidden/id/13662[/img]
Max Bounty is not mentioned as author of code? Is it his real name? -
Dedicated Spectrum Emulation Machine Based on Raspberry PiI've mentioned this in another thread, so I thought I'd give it a thread of its own. I've wanted to build a dedicated Spectrum emulator for a long t…
... sheet to isolate the dangerous voltages.
Then I shortened ... -
The great 128k ConversionWell, I am not sure if it is going to be great. Hopefully it will! This evening, I set about getting my Issue 6A Spectrum Plus working. I suspecte…
... didn't survive the funky voltages.
[IMG]http://i590 ... -
Issue 2 video problemHello all, Need some help with an issue 2 board that I 'm trying to restore. I've replaced all the electrolytic capacitors, changed the voltage regu…
... oscilloscope, but I can measure voltages and follow schematics for the ... -
ZX-Paintbrush 2.2.9.6 releasedDear readers, ***** [COLOR="Red"]A[/COLOR] [COLOR="Yellow"]Happy[/COLOR] [COLOR="MediumTurquoise"]New[/COLOR] [COLOR="Lime"]Year[/COLOR] ****** Tod…
... as editing the full colour palette (with the ability to write ... such a palette as a *.PAL file and ... check the best full color palette for that effect. Would you ... edit the standard ZX-Spectrum palette with the new editing feature ... -
Want a new old PC.Does anyone know of any good place that sell slightly older desktop PC's very cheap? The motherboard in mine is on its way out. Think there is a cr…
... down firmly, testing all the voltages from the power adapters i ... -
TommyGun with AGDHi everyone, I have been working with Jonathan to incorporate his excellent Arcade Game Designer utility into TommyGun. Jonathan has created a compi…
... is CLUT editor for alternate palette. Feel free to razz me ... -
ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…
... ideas and implemented a switchable palette system. There are now ... or, inside the palette editor (the ULA+ palette editor is not ... mentioned here).
Palette 0 is the standard (working ... be loaded into palette 1 by selecting that palette first (using ... -
Thinking of modding an Atari paddle controller for games like Arkanoid...Hello, Was thinking of trying out a controller mod using an Atari 2600 paddle controller to use with games like arkanoid, Batty, etc... The paddle c…
... comparator to convert the analog voltages to digital (left and right ... -
SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
... BASIC. The new 64 colour palette can also be applied to ... !
The 64 colour palette supported by the SPECTRA interface ... -
TIM Interlace SoftwareNot sure if this is the right forum but in my own time I plan to get some stuff up to the archive. I just came across something almost 10 years old. …
... at interlace with the Spectrum palette, with images and steps to ... -
Help reviving a 128 +2 GreyHello m8s, my turn to ask for some help with a +2 Grey. Got it for spares as I do have a working one but I could not resist to try and fix it. As us…
... 78s05 and ztx651 and ztx213, voltages seamed good, tried to power ... same. Then I start measuring voltages at the ram pins since ... -
Arcade Game Designer 4Just released over at the AGD forums. New this time: Sprites can now be individually coloured using the SPRITEINK command. If 16x16 sprites aren't…
... also a new default ULAplus palette.
For the more ...
