World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.018s
<1…16171819202122…34>
  • 48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…

    ... last working memory location. So the system is seeing only 16k bytes ... the first 16k of memory is ROM. Next is the "lower" RAM. Then ... 32,768 (32k) one bit memory locations. The 48k ZX Spectrum ...
    1024MAK 1024MAK August 2014 Hardware
  • Interfaces & ROMsHi everyone, I'm currently looking into the various modern interfaces for the Spectrum to allow me to run all my games from an SD card. I have a few…

    ... ROMs are designed to completely replace the system BASIC ROM chip ... ROM chip back into the memory map.

    Any test ... could have a device to replace my tapes and it was ... , 1 48K acting as a 16K (upper memory fault, but it still ...
    Tekno Venus Tekno Venus September 2014 Hardware
  • ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…

    ... for all subroutines you can replace the unwanted "defw Routine" with ... be placed in the same memory block. In addition, the short ... , I might implement with a 'lower tech' solution that does not ...
    Alcoholics Anonymous Alcoholics Anonymous September 2014 Emulators
  • Issue with Issue Two[img]https://dl.dropboxusercontent.com/u/25300140/Spectrum/Edited_ImageEasyImageEditor_20141111_84.jpg[/img] I'm working on an Issue Two that was sh…

    ... /> Has anyone used 4164s to replace the lower memory? I've seen a ...
    protek protek November 2014 Hardware
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... the lower RAM were bad. Plus the machine will run 16K programs ... a 16K program - if it crashes, the problem is in the lower ... ULA problem - just a standard memory problem I reckon.

    I've got memory chips in stock if you ...
    Spirantho Spirantho December 2014 Hardware
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... ;805419]I rather suspect the lower RAM test failed because of ... data bus, so I'd replace just IC16 to start with ... manifest itself across the entire memory range for those line(s ...
    balford balford December 2014 Hardware
  • Patching RST routines?Hi all, I am quite unexperienced regarding the Speccy and today I made another attempt to make a concept for a SymbOS port to this machine. There is…

    ... lower page.

    For the other machines you could just replace ... better answer because you gain 16k of space for static code ...
    guesser guesser December 2014 Development
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... IC23 to boot it as 16K and that works.
    I ... if it initialised as a 16K model, which from what you ... then tried to load the memory test program from Zorns website ... a 16K model and corruption of the contents of the lower RAM ...
    Zorn Zorn January 2015 Hardware
  • Spectrum +2a memoryHi all, Happy New Year. A quick question, I have a Spectrum +2a that I am seeing a very intermittent fault, once every 20 - 30 power ups. I plug…

    ... crashing, so I moved the memory ICs around and the issue ... OK apart from once a 16K lower memory failure.

    Russ
    bagpuss22 bagpuss22 January 2015 Hardware
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... hardware hacks to make it 16K) - just fire up the speccy ... , go into the Tool for memory changing, open the Window, and ... fault. If your -5V is lower than -4V then it's ... it's probably a bad lower RAM chip or electrolytic capacitors ...
    Spirantho Spirantho January 2015 Hardware
  • Favourite Speecy HardwareHi, Just wondering what your favourite piece of Spectrum add-on hardware is/was? How about the Alphacom thermal printer? Or the Currah Speach thin…

    ... I've not sought to replace it since.

    Cheetah ... someone who had only a 16K Spectrum when the software started ... first unit had a faulty memory refresh, but the replacement gave ...
    Matt_B Matt_B January 2015 Sinclair Miscellaneous
  • Seeking April fool article: turn 48k into 128kHi everyone! When I was about 11 years old (I think ?) an article appeared in a Spectrum related magazine. It turned out to be an April fool's joke,…

    ... /> I owned a ZX Spectrum 16k and it took me almost ... code to run in a lower address. When I finally got ... .worldofspectrum.org/infoseek.cgi?regexp=^Memory+Expansion+Program$&pub=^ZX ...
    The_Bert The_Bert February 2015 Sinclair Miscellaneous
  • 64k speccydoes anyone have instructions on how to use the extra 16k found in some spectrums?

    ... chips used for the "upper" memory are not actually faulty.
    memory. Remember, you need eight ... want to increase the available memory, it requires modifications to the ... . The 80k bytes comes from 16k bytes "lower" RAM plus two banks ...
    1024MAK 1024MAK September 2015 Hardware
  • Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…

    ... way I'd get working memory. As long as I ... his lower RAM performed.

    A few days later the memory ... see the amount of usable memory and I get 8649. ... Is that right for a 16K speccy? (8K ROM, 8K ... br />
    I have a 16K pool game on tape kicking ...
    namtip namtip November 2015 Hardware
  • Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…

    ... a report of problems with lower RAM before and as the ... critical than the Z80 CPU memory accesses, the result is screen ... tried using a SRAM to replace the lower RAM.

    [b ...
    1024MAK 1024MAK November 2015 Hardware
  • 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…

    ... the CPU addresses the lower RAM, or certain I ... has to read the video memory (pixels/colors) for the ... contend at least a 16K bank and that 8K ... write from video memory (or any memory in the 16K lower RAM), then ... to re-read the memory contention chapter a dozen ...
    cbmeeks cbmeeks December 2015 Games
  • Testing 4116 type DRAMsHappy New year All! I'm managed to find some time to repair some more Spectrums :) woo hoo. I have a couple with busted lower RAM, Sooo, I appr…

    ... for errors in individual bits / memory locations.

    So basically ... , try 16K*4 or 64K*4 DRAMs, or a lower RAM replacement ...
    RetroTechie RetroTechie January 2016 Hardware
  • Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…

    ... . The only way you can replace the ROM with RAM on ... ]] - also lumps you with contended memory in the other two banks ... bit. But even then, a 16K Spectrum was all contention, and ...
    joefish joefish February 2016 Games
  • Something is missing from my life.I've been bandying around with the idea of why it's just not quite the same, even when playing Spectrum games as it was back in the eighties. . A…

    ... .jpg[/img]

    Another 16K game, extremely quick to load ... on anything other than the lower levels, so the challenge was ... 10.[/i]

    A memory issue perhaps? Who knows. I ...
    Morkin Morkin June 2016 Games
  • A Spectrum emulator for the C64Recently I found this, a emulator that runs ZX Spectrum BASIC on a Commodore 64. It was made in 1985. I remember reading about it in a magazine. Curi…

    ... loading the ROM into memory and fixing absolute jumps?[/ ... and working from very distant memory) everything is in the wrong ... ; you're limited to 16K, it's not quick ... it would have to be 16k only, in fact I ... modified spectrum ROM in the Lower ROM bank, the Amstrad ...
    AndyC AndyC July 2016 Sinclair Miscellaneous
  • Reproduction Issue 1 grey keymats - yay or nay?A discussion is live on the Spectrum 4 Ever FB group regarding whether it's a good idea to have replacement grey keymats for Issue 1 Spectrums produc…

    ... only 16k bytes of RAM (I have a third party memory upgrade ... is, how much can you replace on a Spectrum before it ... 's brush status? If you replace the key mat, the membrane ...
    1024MAK 1024MAK November 2016 Hardware
  • TommyGun updatehttps://drive.google.com/file/d/0BwXFKYO5i1IlN2U4MUtrRVZZWUE/view?usp=sharing Hi, I have updated my TommyGun application and since we can't uplo…

    ... work in it for either 16K or 48K code.
    The ... a different folder.
    From memory I think I removed that ... at tonyt73 # gmail com
    replace the # with @ and put a ...
    kiwi73 kiwi73 December 2016 Development
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    Sounds like a "lower" RAM fault.
    It's ... that can replace the Spectrum's ROM with a memory test ROM ...
    1024MAK 1024MAK December 2016 Hardware
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... type. In the 16k and 48k computers, eight 16k bit chips are ... used. Each has 16k bits of memory, which is ONE BIT ... of every byte of the lower RAM working. It will not ...
    1024MAK 1024MAK January 2017 Hardware
  • ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…

    ... tools allow you to ultimately replace whatever you want with hand ... resource limited in terms of memory and speed. Every decision that ... for everything.

    Even lower level at the sprite engine ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Development
  • ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…

    ... chip will cause a whole memory block to fail (in the ... 4116s, this will be the 16k "lower" memory including the screen and system ... will also be in the lower memory area. Corruption of the stack ...
    1024MAK 1024MAK January 2017 Hardware
  • Database model ZXDBRecently, I have been trying to figure out how to provide my contribution to whoever takes over WoS archive rework next... So I came up with this: …

    ... that would have a workload lower than necessary in this case ... entire copy was loaded to replace it). Exactly as I ... Constantly allocating and freeing small memory areas concurrently, in no established ... you can suggest ways to replace them with views or ...
    Einar Saukas Einar Saukas January 2017 Announcements
  • ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …

    ... 's on it (ULA version, memory chip access times, wire links ... built-in test procedures for lower RAM, upper RAM, etc.
    replace. But for fault-[i]finding ...
    RetroTechie RetroTechie May 2017 Hardware
  • ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …

    ... this slightly differently. Assuming a 16k/48k ZX Spectrum, a ZX ... SRAM chip is used to replace the existing ROM, the parasite ... to respond at the Z80 memory cycle timing. Using the Z80 ...
    1024MAK 1024MAK June 2017 Hardware
<1…16171819202122…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
replace 5.4K 6.2K
lower 6.4K 7.8K
16k 5.5K 7.7K
memory 21.8K 32.5K

Related Threads

  • Memory Available for 16k and 48kAm I right in thinking that if I am writing a 16k Game, I have 8k available for the machine code prog 6000h to 8000h, and for a 48k game I have 40K a…
  • SRAM replacement for lower 16KSome time ago I wondered if it were possible to replace the lower 16K RAM of a 16K/48K Spectrum with a single SRAM chip. You know, those pesky 4116 D…
  • New memory model: 16K/48KAs earlier suggested in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=32096"]this thread[/URL], there was also Spectrum software that …
  • Upgrading 16k MemoryHi All<br /> <br /> I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flas…
  • 32k memory Italian memory expansionNot mine but its an [URL="http://www.ebay.co.uk/itm/TENKOLEK-32K-RAM-Expansion-Sinclair-ZX-Spectrum-/320861810075?pt=UK_VintageComputing_RL&amp;hash=…
  • 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.<br /> …
  • 16K/48K Lower RAM (4116) replacement.You may want to read [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37957"]this thread[/URL] for background information on the quest t…
  • When is a 16k not a 16k ?Can anyone explain what this machine is supposed to be ?<br /> <br /> Speccy with a 16K sticker on the base.<br /> <br /> Doing a peek 23733 returns…
  • Another hardware question - lower 16k bad?Like in my last question, I am referring to this video from JoulesperCoulomb (https://www.youtube.com/watch?v=IzgCmldm2H4), this time, it is with the…
  • 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?<br />…

Related Searches

  • lowest memory for code
  • lowest memory position for machine code
  • lowest memory position machine code
  • lowest memory machine code
  • lowest memory code
  • lowest memory
  • memory map
  • lower
  • 128k 2 lower upper memory
  • 128k 2 grey lower memory
  • 16k memory read
  • 16k memory read 32768
  • 16k memory peek 32768
  • 48k memory shown as 16k
  • 16k to 48 k memory upgrade
  • 16k to 48kzx spectrum memory upgrade
  • 16k to 48k zx spectrum memory upgrade
  • spectrum 128k lower memory
  • 16k memory map
  • replacement lower memory

Copyright © 2024 World of Spectrum