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  • Save 48k SNA from 128k Z80 snapshot?I have been doing RZX recordings of text-based adventure games. In the case of games made with GAC (Graphic Adventure Creator), where a map and solut…

    ... prevents me from saving a 48k SNA because I am running ...
    equinox equinox June 2020 Emulators
  • 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…

    ... ,, i have a zx spectrum 48k issue 4B with a display ...
    mark8bit mark8bit June 2020 Hardware
  • 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…

    i have just received a 48k issue 3. initial tests show ...
    mark8bit mark8bit August 2020 Hardware
  • 48k Spec with composite video mod, screen adjustment possible?I've had a 48k Speccy with a composite video mod for a few years now, and although it works perfectly otherwise, the screen isn't centered correctly …

    I've had a 48k Speccy with a composite video ...
    Skaepoy Skaepoy August 2020 Hardware
  • 48K ROM copyrights holderHi everyone I would like to check with you about the rights to the 48K ROM. It seems the current rights owner is Sky UK. Did anyone have any recen…

    ... about the rights to the 48K ROM. It seems the current ... the original ZX Spectrum ROM (48K) would make things easier.
    claudiu_cwg claudiu_cwg October 2020 Sinclair Miscellaneous
  • Raspberry PI in a Spectrum 48k+ case Keyboard OptionsHi, I was lucky enough to get an empty Spectrum 48k+ Upgrade Kit Case on eBay. This is good because it doesn't involve taking apart a good Spectrum a…

    ... to get an empty Spectrum 48k+ Upgrade Kit Case on eBay ... number "Upgraded" on bottom. The 48k+ case has slightly more space ... Pi compared to the original 48k case. The only problem is ... always very fragile on the 48k\48k+ so I need a solution ...
    lynn3686 lynn3686 October 2020 Hardware
  • 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 have a issue 3B 48k that i am looking at ...
    mark8bit mark8bit October 2020 Updates
  • Batman the Movie - 48k TAPHello Everyone, Just wondering if anyone has a working 48k Batman the Movie TAP file. Game as per the below:- https://worldofspectrum.org/archi…

    ... if anyone has a working 48k Batman the Movie TAP file ... fancy a go on my 48k+ but its no fun without ...
    AD-RS1600i AD-RS1600i November 2020 Games
  • Games With Separate 48K and 128K Versions There are some ZX Spectrum facets that throw up a strong sense of "deja vu" in me when I come across them again (and this particular subject …

    ... about games that have a 48K version on one side of ... were brought out with a 48K version on the one side ...
    harriusherbartio harriusherbartio November 2020 Games
  • 'Diary on the making of 'Mr.Do!' for the 48k/128k ZX Spectrum' by Mark R. JonesHere is my 'Diary on the making of 'Mr.Do!' for the 48k/128k ZX Spectrum'. It's a free, 50 page PDF. I hope you find it interesting: https://drive.go…

    ... of 'Mr.Do!' for the 48k/128k ZX Spectrum'. It's ...
    Mark R. Jones Mark R. Jones December 2020 Books
  • Want a 48kAfter reviving my old 128k i would like to return to basics with a 48k. I never had one since i was too young. In fact i was the kid always annoyin…

    ... return to basics with a 48k.
    I never had one ... the ones who have the 48k's-my brother had a ... i am looking for a 48k even if not working since ...
    asoares asoares January 2021 Wanted
  • 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…

    ... routine for the ZX Spectrum 48K. It was for a text ...
    Volker Volker February 2021 Software
  • zx spectrum 48k issue 6A boot fail- black paperohh whats wrong with this poor specie .. boot fail,, border white & paper black .. when reset it shows the red lines to indicate that the CPU is cycl…

    ... the ram passes.. but the contention test fails, the interrupt test ...
    mark8bit mark8bit February 2021 Hardware
  • The "Kiddification" Continuum : "serious" 48k software versus "kiddified"128k software?Of course this is a gross simplification . The idea of a straight line continuum with "serious" 48k software on one side and "kiddified" 128k softwa…

    ... straight line continuum with "serious" 48k software on one side and ...
    harriusherbartio harriusherbartio February 2022 Games
  • New Game: Hakkenkast : Dungeon Crawler 48K & 128KLaunched this week, a 4 dungeon epic Dungeon Crawler, Hakkenkast. Available as 48K and 128K versions, 1st dungeon is free. Download from[url="https:/…

    ... Dungeon Crawler, Hakkenkast. Available as 48K and 128K versions, 1st dungeon ...
    Minilop Minilop August 2022 Brand new software
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... writing stuff to VRAM. RAM contention is off when non-speecy ... epaging? Might be useful if 48k programmes cause problems)
    < ... at 32k, the bottom at 48k
    D5 - selects where ... decided how the 48k is written. Once the 48k is written ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • an idea that could be very very good...but also very very bad...Hello all! I've been having a chat with some of my friends round here that once loved the spectrum (well...2...as they're all heathens round here...)…

    ... different z80 than the memory contention or ULA. There aren't ... were, and more than the 48k was with 128k games ;)
    b00mzi11a b00mzi11a January 2004 Emulators
  • Classical music in Spectrum gamesFollowing a point made by GOC, I would list the pieces of classical music featured in Spectrum games. As far as I can remember right now: - Manic Mi…

    Technician Ted 48K plays The William Tell Overture ... play The Romeo and Juliet Suite?

    JSW played Beetoven ...
    ewgf ewgf February 2004 Games
  • whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…

    ... special circumstances.

    A 48K Spectrum has 70000 cycles in ... this routine, not counting memory contention during the pushes.

    Alcoholics Anonymous Alcoholics Anonymous March 2004 Games
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... * at 69888 TStates on a 48k. That value is different for ... want to dabble with memory contention at a later date, then ...
    Dunny Dunny September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    Forgive me if I'm wrong, but doesn't Phil's test suite require an emulator that outputs advanced details and needs memory contention ?
    GOC GOC September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... suite require an emulator that outputs advanced details and needs memory contention ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... a Z80 test suite, not a Spectrum test suite[1]) and a ... you fix) or the test suite (which the Fuse team 'should ... does have Spectrum-like memory contention in it. You can ignore ...
    Philip Kendall Philip Kendall September 2004 Development
  • Most popular new features? I know some people like a spectrum to be emulated as authentically as possible, while others like myself like features which improve the gfx, sound,…

    ... to the fact that differing contention models will not throw synchronisation ... emulator that can only run 48k games. Similarly, what kind of ...
    Dunny Dunny October 2004 Emulators
  • Is there much ?Do you think there`s much cooperation, and in fact co-development now goes on within the 8-bit community.. in fact is there any? I know that`s a daf…

    ... some more of the contention details of the 48k machine by a ...
    Dunny Dunny November 2004 Development
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    ... your first post for the 48k timings using your program in ... to test on a real 48k - As far as I'm ... useful part of a test suite.

    Unfortunately, I lack ...
    bb6ns3 bb6ns3 March 2005 Development
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    ... ://homepage.ntlworld.com/mark.woodmass/Contention.tzx"]http://homepage.ntlworld.com ... /mark.woodmass/Contention.tzx[/url]

    You ... 're set for a standard 48K atm). It'll be out ...
    Woody Woody March 2005 Development
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    ... matches the FAQ figures for 48K and 128K models. I then ... /frame and tried several arbitrary contention starting points, and it was ... />
    A test on real 48K/128K hardware would be good ... runs.

    Does the contention pattern look at all right ...
    Woody Woody March 2005 Development
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    ... :
    A test on real 48K/128K hardware would be good ... />
    [quote]
    Does the contention pattern look at all right ... ?
    [/quote]

    The contention pattern is different to the ...
    Fred Fred March 2005 Development
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48k 20.9K 29.1K
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