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  • Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…

    ... i][b]How much more memory does it use?[/b][/i ... b] uses 8677 bytes of memory, generating 22 bicolor rows. ... use 8728 bytes of memory, a difference of only ... entering or leaving the gameplay area? If so, use [b ... have an even larger gameplay area? In this case, use ...
    Einar Saukas Einar Saukas September 2015 Brand new software
  • Sinclair QL bad memoryI googled around trying to see if there was a resource for this but didn't really find anything specific. I have a QL with the white screen proble…

    ... screen problem which indicates bad memory, so I plopped a Minerva ... you addresses of the bad memory...Problem is that doesn't ... help me identify which IC memory chip it is. Is there ... " a good chip on each memory chip but the only result ...
    beanz beanz September 2015 Hardware
  • Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…

    ... various options for loading from memory card.

    What do ... to find their way onto memory card?
    merman merman September 2015 Hardware
  • The history of ESXDOS, the DivMMC and the DivMMC EnJOY![img]http://benophetinternet.nl/hobby/divmmc_history/1%20esxdos.jpg[/img] These are the stories behind esxDOS, the most popular operating system e…

    ... !
    - swap partition
    - virtual memory up to 4Mb

    area, I thought - this is the ... the ZXMMC.
    The DivMMC memory mapping is compatible with that ... with other ports.
    The memory paging port is compatible with ...
    bverstee bverstee October 2015 Hardware
  • Emulate Interface One Local Area NetworkApologies if this is a daft question, but are you able to emulate the Local Area Network by running two copies of SPIN (or equivalent)?

    Apologies if this is a daft question, but are you able to emulate the Local Area Network by running two copies of SPIN (or equivalent)?
    jonesypeter jonesypeter October 2015 Emulators
  • No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…

    ... magic wand to remove the memory contention, what software would break ...
    cbmeeks cbmeeks November 2015 Development
  • Britsoft - Read-Only Memory Publishing"Britsoft" by Read-Only Memory Publishing is their latest book charting the rise and fall of game development in the UK from the early 80s to the end…

    "Britsoft" by Read-Only Memory Publishing is their latest book ...
    redballoon redballoon March 2016 Announcements
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... the 128K's shadow screen area and I can't for ... (0-7) to map into memory at 0xc000.
    ; c = Bit ...
    pointblnk pointblnk August 2016 Development
  • 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…

    ... ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano seconds ... refreshed, the contents of the memory will get lost? 15ns? ...
    Same for the upper memory:
    TMS4532-3 Texas Instruments ...
    georgedb georgedb August 2016 Hardware
  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    ... regulator.
    Lower and upper memory modules from... http://zx.zigg ...
    RSwipeCA RSwipeCA August 2016 Hardware
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... command directly to the screen memory.

    5 LET a ... into a different part of memory first then dump it to ...
    ivanb303 ivanb303 September 2016 Sinclair Basic
  • UDG generator doesn't work, why?Typing in the UDG generator from the manual I get integer out of range when I run it. I'm going nuts trying to figure out whats wrong. Can someone pl…

    Typing in the UDG generator from the manual I ... in the archive for a UDG generator that runs in basic ...
    mik3d3nch mik3d3nch October 2016 Sinclair Basic
  • Ordered tapes and memory links.I did something a bit sad this evening... In the old days of Spectrum, I used to keep my tapes in those little plastic cases / racks from woolies.…

    ... , I get a very strong memory of the time and the ... in order to keep the memory link up:
    I went ...
    Luny Luny October 2016 Sinclair Miscellaneous
  • How to get more than 21 UDG's in BASIC?So with graphics mode under the G cursor how many UDG's can you do from BASIC is it 21? It's all POKE 65368 and above and it's sequential ABCD.... an…

    ... the G cursor how many UDG's can you do from ...
    ivanb303 ivanb303 November 2016 Sinclair Basic
  • Contended Memory, literallyDoes anyone else have the sort of memory where they have trouble just picking out info cold? I know we had a discussion about memory sometime last mo…

    ... else have the sort of memory where they have trouble just ... we had a discussion about memory sometime last month, but...
    memory, but my brain wouldn't ... that's it, my association memory is broken. Its all there ...
    Luny Luny December 2016 Chit chat
  • Contended memory article on WikipediaYeah, apparently there's one. https://en.m.wikipedia.org/wiki/ZX_Spectrum_Contended_Memory [quote] However, the ULA must wait for a Z80 read or wr…

    ... 's clock and access the memory. As the ULA has no ... advance, it relies upon the memory being available to read to ...
    Hikaru Hikaru December 2016 Sinclair Miscellaneous
  • Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…

    ... ROM, which failed the upper memory RAM test, suspecting IC25 and ... high to enable the upper memory and under which conditions? Any ...
    protek protek January 2017 Hardware
  • User-friendly UDG banks/sheetsHello, retro-colleagues) Sometimes I still play Speccyal games and try funny things in BASIC, but one thing keeps me slow: [b]sprites[/b]. Alright…

    ... -copyrighted, non-branded) mere 8x8 UDG sets one could easily integrate ...
    NRA NRA March 2017 Sinclair Basic
  • Screenshots from my old BASIC gamesI have written several dozens of games in 90's. They haven't remained, so I show only screenshots 'for history'. Some screenshots are real, but all…

    ... earliest are recreated from my memory.

    All games have ... chapter – REY+ (on screenshot) – with UDG

    [img]http://i ...
    Oleg Origin Oleg Origin March 2017 Sinclair Miscellaneous
  • 128k memory musingI've been pondering on the 128k memory thing a bit, and it's just bloody stupid. The 64k memory space is divided in four chunks. One is always los…

    ... pondering on the 128k memory thing a bit, and ... br />
    The 64k memory space is divided in four ... no way to page in memory there. Second chunk is ... Third is fixed to usable memory. Fourth is the bankable ... be in the always-resident memory (the fixed 16k + the ...
    Sol_HSA Sol_HSA May 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... get my head around the memory contention issues of the various ... best use of the extra memory. I've searched the forums ... /> I can understand that the memory is divided up into banks ...
    adrian_singh adrian_singh May 2017 Development
  • z88dk : Support FunctionsJust a quick one here, I am looking to doing some dirty dirty code with C and load a screen$ file from the disk using "system( command )" - yes I …

    ... it into the screen ram area - but my hope is to ... a portion or portions in Memory that are used by system ...
    Zetr0 Zetr0 June 2017 Development
  • off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…

    ... an offscreen buffer is the memory copied to the screen in ... /> Lets say you have an area at the top of the ... would that mean that the memory is organised so that its ...
    slenkar slenkar June 2017 Development
  • Skool daze and back to skool keep crashingHy. I hope I'm posting in the right area. I tried loading and playing both games with a cell phone to my spectrum. The games load (after a bit of …

    ... 'm posting in the right area.

    I tried loading ... an out of memory error. I checked the memory with the "print ... returned are OK. So the memory should be OK. So what ...
    winnetouch winnetouch August 2017 Games
  • Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …

    ... were to wire an additional memory chip, say a 6264 8Kx8 ... , in parallel with the main memory so that it sits in ... the Z80 reads from main memory, it might be possible to ... reduce the effect of memory contention considerably. Possibly with the ...
    The_Bert The_Bert September 2017 Hardware
  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…

    I designed a set of UDG's that can be used ... and it would save 3 UDG's if I could simply ...
    mik3d3nch mik3d3nch November 2017 Sinclair Basic
  • Testing ram memory of DivIDE / DivMMCHere is new utility for testing DivXXX ram memory: [url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/sof…

    Here is new utility for testing DivXXX ram memory:
    [url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/software/divramka.zip[/url]
    velesoft velesoft December 2017 Hardware
  • Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …

    ... />
    I believe it is memory related but I am at ... chips, placed sockets, inserted new memory chips and the result is ... .

    Is this a memory addressing problem? The machine doesn ... 't "see" the memory?

    Where should I ...
    Renegade Renegade December 2017 Hardware
  • How would I turn memory paging on/off in Assembler?Sorry for the noob question. It's perfectly ok to do OUT 32765,48 in BASIC to turn memory paging off. But how do you do it in assembly language? I kn…

    ... ,48 in BASIC to turn memory paging off. But how do ...
    ivanb303 ivanb303 January 2018 Development
<1…14151617181920…34>

Latest Posts

  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade 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
  • 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

HitBox

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udg 1.5K 2.5K
memory 21.8K 32.5K
area 8.9K 11.2K

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