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Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…
... rails from the speccy. The lower ram is easy to get ... -
Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…
... found 4 of the 8 lower RAM banks were nackered.
lower ram, but not inserted it ... to require 12v aside from lower ram was the LM1889 - should ... -
Moritz The Striker for the 48k SpectrumDownload: https://www.dropbox.com/s/bbb7n2ipv7ed4k1/Moritz%20The%20Striker%20-%2048k%20Release.zip?fbclid=IwAR2ZdaHdIFQEKGt5raugVaxeudTcQDJT-nQgSk…
... the card hungry marauding refs, pitch invaders and other assorted characters ... -
Tauon PC-1 android 7 with ZX - anyone tried it?I found this on the internet: [b]https://www.tauonelectronics.com/index.php[/b] It seems like a all in one keyboard/android 7 device with Unreal …
... made for Android 7 and lower.
Package contains: computer ... -
16k and PEEK 40000 (on a real 16k Spectrum)?Imagine a real 16k Spectrum (without any RAM expansion or circuits fitted). What would I get if I do a PEEK or try to access memory over 32767? Wo…
... mirror of what's on lower memory (would it be different ... -
No AY sound from online emulatorsI've writing an app that makes sound using the AY. I have a simple update mechanism that works like this: 1. During a frame, I write values to a b…
... db 0 ; chan a coarse pitch 4 bits
db 0 ... db 0 ; chan b coarse pitch 4 bits
db 0 ... db 0 ; chan c coarse pitch 4 bits
db 0 ... ; noise pitch 5 bits
db %00011000 ... -
48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…
... ,, ie replaced video encoder,new lower ram module.different ULA,crystals ... -
zx spectrum 48k low -5volt raili have just received a 48k issue 3. initial tests show that all voltages are there but the -5V rail is only showing -4V. it does boot but i have tur…
... any further possible damage to lower ram.i have not experienced ... the zener diode? maybe bad lower ram chip holding it down ? -
New Utility ZXSTLC[b]New Utility ZX Spectrum Tape (& Disk) Loader Creator[/b] I made this utility to easily create tape and +3 disk loaders for my projects and have…
... will be made uppercase if lower specified
+--------------------------------------------------------------------------------
[/code ... -
upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…
... it would just fry the lower ram again .. this is one ... -
Games with proper "Micro Manuals"COMBINED CASSETTE INLAY AND "MICRO" SIZED INSTRUCTION MANUAL This is something I have not come across before . Two staples are used to hold it al…
... towards the top side . The lower second staple is used to ... -
zx spectrum 48k interference during first two minutes of warm upi have a issue 3B 48k that i am looking at during the first two minutes (approx.) of warm up there is interference on the screen (tried to take a pic…
... ?? i was thinking maybe a lower ram chip was on its ... -
Earliest game to use custom character set ?The [url="https://worldofspectrum.org/forums/discussion/58040/who-has-got-the-earliest-zx-spectrum-software/"][b]topic here[/b][/url] about early sof…
... -Z , either with or without lower case. Don't want to ... -
Songs of the Spectrum's Heydeys - 1983Ok, we did 1982 the year the Spectrum was released. But now on to 1983 which was the year Sinclair computers were selling in very big numbers. For me…
... largely in part to the lower cost of electronic instruments such ... -
ZX Spectrum Software Hire Clubs. Does anybody remember them? They used to be quite popular circa 1983 . I think some were just for the ZX Spectrum , Others covered a broader range of micros . I think they rel…
... some extent, on the much lower postal costs at the time ... -
Direct drive LCD screen - looking for information on previous projects people may have attempted.Hi All, My first post, so please forgive and guide if I've posted in the incorrect section. I'm a speccy user from way back in the 80's, but m…
... ) that maps over the Spectrum lower 16K, and captures writes to ... area ( or, potentially, replace the lower 16kb entirely, but that's ... -
If you had four roms...Just wondering if you were designing a Spectrum from scratch, and you used a 27512 EPROM, which would hold about 4 spectrum roms, what you would inst…
... accessed and mapped over the lower 16K ROM space as well ... -
Repairs and Reparing.Hi All, Just finished resurrecting an Issue 3A board. Had black lines, so replaced the lower 16K RAM chips, Amazed they just cost a couple of doll…
... black lines, so replaced the lower 16K RAM chips, Amazed they ... -
Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
... -256*INT(o/256): REM lower byte
350 POKE 63693 ... /> 380 POKE 63692,196: REM lower byte
390 POKE 63693 ... -
New Version of ZEsarUX v9.3 Beta 1 availableNew Version of ZEsarUX v9.3 Beta 1 available Downloads: [url="https://github.com/chernandezba/zesarux/releases/tag/9.3-25062021"]https://github.co…
... setting to disable boxes around lower and upper ZX Desktop Buttons ... -
boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…
... , upper ram & logic put lower ram multiplexers in sockets (ic3 ... & ic4) , put lower ram in sockets, full recap ... 's & ULA's. fitted lower ram module ... still no boot ... -
Killed Until Dead - Spectrum 128K versionI first got hold of this game about the same time as the film "Clue" started being shown on TV, and there was a "Miss Marple" series on TV, followed …
... enough), copy some routines from lower in memory to this area ... -
Missed opportunities in the 80'sAll the talk of the Loki got me thinking... What if someone had built an expansion box for the speccy that had the 3812 Yamaha music chip ( Adlib Sou…
... the era, but at a lower cost than buying a new ... -
ZEsarUX 10.0ZEsarUX 10.0 is out! Download it from : https://github.com/chernandezba/zesarux/releases/tag/10.0 Changes: Version 10.0 - Clive Sinclair edi…
... setting to disable boxes around lower and upper ZX Desktop Buttons ... -
Paging for 64Kb of Video Ram??? What is the best way to page this?Hi all, I'm just putting together a concept card for a "Loki" style of video card, which supports shadow ( so it fits a normal Speccy ) and also t…
... or 512x192 ) to occupy the lower 48K of memory and leave ... -
Spectrum Abuse...Just got some new Spectrums in to repair ( I find it a great way to relieve stress, excepting when I do something daft while fixing them... ) One …
... that it had a faulty lower-16 ram chip... Replaced and ... -
8-bit webcam & Speccy imagesI want to present you my small pet-project, made for the soul and for practicing some modern web technologies. The project is called "8-bit Camera…
... tablets (the square in the lower right corner of the video ... video sound (circle in the lower left corner of the video ... -
Building a ZX Spectrum and I have some voltage questionsI've posted about this before looking for parts, but now I've found all the hard-to-get stuff (thank you Retrolium!). So I figured new questions, new…
... RF Modulator)
+5V to Lower RAM: +4.98V
+12V ... to Lower RAM: +12.56V
-5V ... to Lower RAM: -4.31V
+5V ... something to do with the lower voltages I'm seeing?
