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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 ...
    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
  • 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…

    ... which is in the 16K bank $4000-$7FFF. Hence if ... paged in, so without any bank switching, that is where any game ... the screen. I understand that bank 2 is already resident at ... and if so load into bank 4 or 6, and if ... +2A/+3 load instead into bank 1 or 3?? I want ...
    adrian_singh adrian_singh May 2017 Development
  • CEZ-GS strikes back with new Spectrum stuff...Something new is aproaching...March 10th will be a great day for our Spectrum! as you can read in this news... [url]http://computeremuzone.com/?id=n…

    ... , as I could switch the bank, do the work and switch ... . Then, it could handle the bank switching transparently. We would still need ... "4. platform independent functions" heading. SP1 is still not documented except ...
    Alcoholics Anonymous Alcoholics Anonymous March 2007 Games
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... to produce 128K games with bank switching without having to fiddle with ... to use splib2 rather than SP1. If only I had the ...
    na_th_an na_th_an January 2011 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…

    ... .

    3. Use 128k bank-switching.


    What system ...
    windenNTW windenNTW July 2003 Games
  • WANTED: East London robotics 80K expansionWANTED: an 80k memory expansion board for an issue 1 spectrum! These had 64K on them with a bank switching register and were sold by East London Robo…

    ... 64K on them with a bank switching register and were sold by ...
    swifty swifty August 2005 Wanted
  • 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 …

    ... be full 128k emulation. No bank switching. You'll get 128k snapshots ...
    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…

    ... .
    Added - 128k RAM page bank switching mechanisms for the RAMDisk routines ...
    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 …

    ... .
    Added - 128k RAM page bank switching mechanisms for the RAMDisk routines ...
    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 …

    ... , 2 things are important here: bank switching of that extra RAM - we ...
    piters piters October 2006 Hardware
  • Betadisk shematics & 48K-CPMHi out there, can someone help me out with the shematics for the Betadisk-Interface? I built one 17 years ago, it works fine till today, but I'm to …

    ... with TR-DOS and a bank-switching-add.
    It would be ...
    PORTHOS PORTHOS October 2008 Hardware
  • Mass storage - why backup battery?I wasn't sure to post this under "hardware" or "development", but here goes: There are these mass storage devices for ZX Spectrum, and on many desig…

    ... 's where a technique called bank switching comes in. Any experienced coder ...
    RetroTechie RetroTechie February 2010 Hardware
  • Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…

    ... ? :-? , is it something like the bank switching or more available workspace in ...
    spider spider December 2010 Games
  • T/S 2068 & SpectrumBorrowing what you see below from the Timex Sinclair 2068 Beginner/Intermediate Guide, by Fred Blechman. It appears the T/s 2068 was intended to be …

    ... leaps.

    - [B]Bank switching[/B]: The Z-80 microprocessor ... got around that with "bank switching" which allowed the machine ... , the Spectrum did not have bank switching.

    - [B] ... , like Mode 1. By switching rapidly between Modes 1 and ...
    jegs2 jegs2 March 2011 Hardware
  • 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…

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

    Any ...
    Kiwi Kiwi November 2013 Development
  • LOADing 128k's worth of data???Just getting to grips with the concept of the 128's 'bank switching' set up, but how can you load the stuff into memory from tape (or TAP file)? Do…

    ... concept of the 128's 'bank switching' set up, but how can ... place them in a memory bank with a routine?

    daveysludge daveysludge May 2014 Development
  • A few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …

    ... be used by z80 (including bank switching), If there is any. And ...
    jungleston jungleston October 2015 Hardware
  • 48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…

    ... 27 to do the address bank switching, jumper wire from ROM socket ...
    witchy witchy December 2015 Hardware
  • Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…

    ... have a music routine in bank 6 that plays with 49158 ... 49152.

    Does the bank switching mean interrupt routines cant be ...
    daveysludge daveysludge November 2016 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…

    ... following.
    | -b switch off bank switching, useful for some older games ...
    TomD TomD August 2020 Brand new software
  • What are editor scratchpads?I've been reading and experimenting with 128 bank switching and using the shadow screen. The technical reference [url="https://worldofspectrum.or…

    ... reading and experimenting with 128 bank switching and using the shadow screen ...
    KrazyKattapilla KrazyKattapilla September 2020 Assembler
  • 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…

    ... make it 128k and have bank switching and music etc.

    robpearmain robpearmain August 2021 Development
  • Quiz VI - Trident on VESA Local Bus.... Something to keep everyone busy while Arjun sorts out his caboodle of questions.... Ok, 12 quick fire questions.. Some cryptic - you`ll have to un…

    ... points for stating that the bank switching is done by an OUT ...
    Woody Woody June 2002 Games
  • Some \"newbie\" questions about the Spectrum +2I bought a +2 last week. I had never owned any of the 128k Spectrums before, nor seen them in action. I have a couple of questions; 1) Do all 128k …

    I have a few Sinclair cassettes with Amstrad mentioned that say to load in 48k mode. The +2A action pack and 007 pack had 128k games. Both bank switching and the sound chip is available in 48k mode. There is a way to get back to 128k mode.
    Fraser Fraser June 2002 Games
  • 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 …

    ... have unless you understand ROM bank switching at the hardware level.
    Anonymous Anonymous October 2002 Sinclair Miscellaneous
  • 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 …

    ... isn't going to do bank switching.

    This is a ...
    Alessandro Tommasi Alessandro Tommasi October 2002 Sinclair Miscellaneous
  • 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 ...
    Alcoholics Anonymous Alcoholics Anonymous July 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…

    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 ...
    Woody Woody August 2003 Games
<1234567…34>

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