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<1234567…34>
  • maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …

    ... RAM for a Z80 using bank switching?

    The Enterprise64 home ... a Z80?

    A bank switching scheme allows the memory to ... data as well. On the 128k model, the additional 64 kB ...
    Rebelstar Rebelstar February 2013 Hardware
  • How did bank switching work on the 128K Spectrums?I'm new to Z80 and ZX Spectrum. So I was wondering how the 128+ models managed to work with more than 64K of memory? I'm somewhat familiar with h…

    ... 'm somewhat familiar with how bank switching works (I believe the Apple ... had a weird way of switching banks...IIRC). Anyway, any insight ...
    cbmeeks cbmeeks October 2015 Hardware
  • A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…

    ... here for your generic loader and I created ... length. Your loader takes care of bank switching for 128k programs so ... disk and returns to basic, when I call ... the clear command in basic before doing this.
    ld a,$10 ; page BASIC ROM
    call paginar
    Speccy_James Speccy_James February 2014 Development
  • Announcing: The +2A/+3 FLASH ROM adapter boardAs I've mentioned in a couple of other threads, this project is coming along quite well now, so I thought I'd post some details up here. I've built …

    ... effort - all you need for basic bank switching on an IO port is ... decoding a port to switch bank could be useful to some ... installing a pair of alternate 128k rom sets, the switch is ...
    guesser guesser December 2009 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…

    ... the RAMDISK could handle the BASIC Bank switching making the extra memory ... more usable and accessible to BASIC . It is interesting that ... any potential sale of commercial BASIC 128K software . I do not ... will find any of these BASIC 128K progs to document - not ...
    harriusherbartio harriusherbartio February 2022 Games
  • Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…

    Erm..another novice-like question: if you were to use memory bank switching in 128K, did it help in faster scrolling? In other words, did 128K allow programmers to do scrolling faster and/or better?
    Arjun Arjun August 2003 Games
  • Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…

    ... you were to use memory bank switching in 128K, did it help in ... scrolling? In other words, did 128K allow programmers to do scrolling ...
    Woody Woody August 2003 Games
  • Announcing: The +2A/+3 FLASH ROM adapter boardAs I've mentioned in a couple of other threads, this project is coming along quite well now, so I thought I'd post some details up here. I've built …

    ... at all... the bank selection and write protect switching is completely manual ... effort - all you need for basic bank switching on an IO port is ...
    Winston Winston December 2009 Hardware
  • 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…

    ... contention issues of the various 128K/+2/+2A/+3 spectrum ... into either 128/+2/+3 Basic and using a debugger ... paged in, so without any bank switching, that is where any ... FAQ says that for the 128K/+2 models, banks 1 ... machine is 128K/+2 and if so load into bank 4 ...
    adrian_singh adrian_singh May 2017 Development
  • Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …

    ... Typing USR 0 in 128 BASIC effectively calls memory address 0x0000 ... br /> ;Since the 48 BASIC ROM is paged in, ... that bank 7 is used to store bits of BASIC
    loader
    ;before anything ... g. a 48K program switching a 128K machine into a proper ...
    Hikaru Hikaru August 2010 Development
  • Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …

    ... Typing USR 0 in 128 BASIC effectively calls memory address 0x0000 ... br /> ;Since the 48 BASIC ROM is paged in, ... that bank 7 is used to store bits of BASIC
    loader
    ;before anything ... g. a 48K program switching a 128K machine into a proper ...
    BiNMaN BiNMaN August 2010 Development
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... learn how to use the bank switching as I had a few ... lower 16k bank so I could have a proper disk loader for ... properly in 128k mode and the SPECTRUM command on 128 basic stops ...
    spodula spodula January 2011 Hardware
  • Request for help (Z80 gigascreen loader)Although I'd attempted to stick to keeping things simple in Image to ZX Spec now I've implemented Gigascreen (8x8 only) I've found the BASIC Gigascre…

    ... was in providing the basic for the video loader. I don't ... program assembly - just a slideshow loader that looks like that.
    bank switching/image interleave is a problem ... see you have Double Dragon 128K to work on! :)

    brownb2 brownb2 February 2011 Development
  • Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…

    ... if you start a 128k machine in 128K BASIC, and then you switch ... (to not to disable the bank switching mechanism), the BANK_M system variable ... and go back to the BASIC loader. That is, to directly write ...
    mcleod_ideafix mcleod_ideafix March 2012 Games
  • Why do games work using USR0?I'm trying to get Terramex to work from disk. In the [url=http://www.worldofspectrum.org/forums/showthread.php?t=34332]thread about +2A/+3 incompatib…

    USR0 mode uses bank switching using OUT 32765.
    Standard 128K BASIC needs POKE 23388 ... interrupt will switch back to Bank stored in 23388., and if ... wrong bank.
    I'm sure, Terramex loader can be modified for 128K BASIC.
    LCD LCD February 2013 Games
  • Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…

    ... CLEAR 23999 in a simple BASIC loader and it's shifted down ... need more RAM, use bank switching of the 128k. Nowadays there is no ...
    Speccyman Speccyman July 2013 Development
  • multiface basic loaderdoes anyone know how I can see whats in the basic loader of the multiface 1 and 128 basic loaders and how I could convert a tape save from the 1 and…

    ... can see whats in the basic loader of the multiface 1 and ... 128 basic loaders
    [/quote]
    It’s a standard ROM loader ... .

    The 128K version will naturally do some bank switching alongside loading.
    Ast_A_Moore Ast_A_Moore December 2017 Sinclair Basic
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... , plus you always need a basic loader to launch the M/C ... disk.

    A simple basic loader code would be as follows ... /> [/code]
    In theory the loader will handle any single char ... )[/b]
    As default the loader uses the z80 snapshot screen ...
    TomD TomD May 2019 Development
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... 2 & 0) but with bank switching off which improves compatibility a ... I've added a 2nd basic loader for disks with only ... ║ -b: do not add autorun basic routine to disk, useful if ... ║ -h: make the loader code, autorun basic & 128k 2nd file visible on ...
    TomD TomD May 2019 Development
  • Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…

    ... time.

    3. Use 128k bank-switching.


    What system ... coding by typing DATA into BASIC ;)

    BTW, after reading ...
    windenNTW windenNTW July 2003 Games
  • BASin and the 128k commandsI've decided to look at incorporating the 128k commands PLAY and LOAD!, SAVE!, MERGE!, VERIFY! for the ramdisk. It won't be full 128k emulation. No …

    ... to look at incorporating the 128k commands PLAY and LOAD!, SAVE ... 't be full 128k emulation. No bank switching. You'll get 128k snapshots out ... rather have? Full 48k, or 128k?

    D ...
    Dunny Dunny November 2005 Sinclair Basic
  • BASin Release 13 is now availableI'm still at it. BASin is now in it's 13th incarnation (disregarding the inter-version updates) and is now available at [url="http://homepage.ntlw…

    ... you can create your BASIC programs with consummate ... Disk possible!)
    Added - 128k RAMDisk commands - LOAD!, SAVE ... br /> Added - 128k RAM page bank switching mechanisms for the RAMDisk ... routines.
    Added - 128k ...
    Dunny Dunny January 2006 Emulators
  • BASin Release 13 is now available[unashamedly x-posted from Emulators forum] I'm still at it. BASin is now in it's 13th incarnation (disregarding the inter-version updates) and is …

    ... you can create your BASIC programs with consummate ... Disk possible!)
    Added - 128k RAMDisk commands - LOAD!, SAVE ... br /> Added - 128k RAM page bank switching mechanisms for the RAMDisk ... routines.
    Added - 128k ...
    Dunny Dunny January 2006 Sinclair Basic
  • 256K RAM chips in Spectrum 128KSince I have lot of 256K RAM chips, and my 128K has RAM error, I think about replacing all 16 RAM (64K ones) chips with 256K chips. Then it would be …

    ... 256K RAM chips, and my 128K has RAM error, I think ... , 2 things are important here: bank switching of that extra RAM - we ...
    piters piters October 2006 Hardware
  • Request for help (Z80 gigascreen loader)Although I'd attempted to stick to keeping things simple in Image to ZX Spec now I've implemented Gigascreen (8x8 only) I've found the BASIC Gigascre…

    ... ) I've found the BASIC Gigascreen slideshow loader I'd tried to ... PRINT AT Y,1;"* 128K Buffered Video Loader *"
    180 LET Y ... PRINT AT Y,1;"in BASIC before loading this "
    240 ...
    brownb2 brownb2 February 2011 Development
  • 128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…

    ... want a good resource for 128k asm programming.

    Mostly ... how the RAM bank switching works and the screen switching.

    Any ...
    Kiwi Kiwi November 2013 Development
  • WiP New Utility TAPonDSKThere are a few utilities that transfer tape contents to +3 disk but most, if not all, require manual intervention to change the loader and/or rename…

    ... utility which decodes the basic loader and attempts to re ... -d add a simple basic loader file called DISK so it ... additional file just rename the basic loader to DISK
    | ... BASIC loader and rest of code following.
    | -b switch off bank switching ...
    TomD TomD August 2020 Brand new software
  • Pickles and Pearl 128kHi, After abandoning my game Pickles and Pearl in 2008, I did a bit of work in 2020 to make it 128k and have bank switching and music etc. I ha…

    ... 2020 to make it 128k and have bank switching and music etc.
    robpearmain robpearmain August 2021 Development
  • 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 …

    ... pieces to make a 128K version (AFAIK the original ... into $8000, a turbo loader high in memory and ... .

    The 128K version does away with everything ... out to another RAM bank on the 128K Spectrum. However, ... time as another RAM bank. The solution was to ...
    Ritchie333 Ritchie333 August 2021 Assembler
  • Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…

    ... />
    [quote]
    3. Use 128k bank-switching.
    [/quote]
    The lazy ... game will only function on 128K machines. If you choose this ... coding by typing DATA into BASIC ;)
    [/quote]

    ... save it to tape from BASIC.

    I now ...
    Alcoholics Anonymous Alcoholics Anonymous July 2003 Games
<1234567…34>

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