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<1234567…34>
  • 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 ... which is in the 16K bank $4000-$7FFF. Hence if ... paged in, so without any bank switching, that is where ... screen. I understand that bank 2 is already resident at ... 2A/+3 load instead into bank 1 or 3?? I ...
    adrian_singh adrian_singh May 2017 Development
  • what extra port for extra memory ? (256K, 512K, 1024K, etc.)I know that Pentagon uses some extra bits from port 7FFD for extra memory pging: - for 512K model, bit 6 & 7 of port 7FFD - for 1024K model, bit 5, 6…

    ... from port 7FFD for extra memory pging:
    - for ... those bits for extra memory switching and if ... port DFFD for extra memory paging.
    What is ... keep track of a memory bank number, by combining bits ... established port for extra memory, other than the Pentagon ...
    secarica secarica September 2004 Sinclair Miscellaneous
  • Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…

    ... screens, music etc.) into memory banks 1, 3, 4, ... and above, I need memory bank 0 to be switched ... copy data from each bank into bank 0 whenever needed. ... understand loading data into memory banks is easier because ... which should select a bank with a POKE [program ...
    Alessandro Grussu Alessandro Grussu September 2013 Development
  • Emulation and Debugging functionality[Cut n Paste from the original CSS post] Hi all, I'm currently working on SPIN's debugger, which is coming along nicely. Mostly, it's been devel…

    ...
    the following:

    Memory Disassembly/Hex Dumping, either from ... Main (currently paged) memory,
    or from the memory bank of your choice ... functions (such as modifying registers/memory, logging
    register/pc activity ...
    Dunny Dunny June 2002 Emulators
  • divIDE issuesI discovered a few issues with the divIDE hardware and FATware software that may be of interest to some people. 1. ROM paging If your Spectrum is a…

    ... because it is copying the memory bank that normally sits in 0x8000 ... -0xBFFF by paging that bank in at 0xC000-0xFFFF. This ...
    chev chev October 2005 Development
  • Halloween Special!Like all the best zombies, the ZXSpin project rises again on the last day of October. Here's release 0.666 for your enjoyment - get it at [url]http…

    ... - allows you to view a memory bank relative to
    a set ...
    Dunny Dunny October 2007 Emulators
  • SpecBAS 0.644 now available.There's a new SpecBAS out, and it's available for download here: [url]https://sites.google.com/site/pauldunn/SpecOS.zip[/url] Not much new (again) …

    ... there is a new memory bank type - the GRAPHIC bank. Primarily controlled by ... /BMP/GIF) 8bpp graphics in memory, and draw them to any ... , rotated and scaled (both in-memory and at draw-time). With ...
    Dunny Dunny April 2011 Sinclair Miscellaneous
  • 128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…

    ... and 128/+2 have different memory bank models, does not help either ... really talking about the 128?, bank bit B0 implies odd pages ...
    csmith csmith July 2011 Hardware
  • SpecBAS 0.775 released!Hi all - me again :) SpecBAS has been updated again, and a whole load of new stuff has been added. Not many bugs fixed (none reported, and I only fo…

    ... in and played from a memory bank
    WINDOW MERGE id can ...
    Dunny Dunny May 2013 Sinclair Miscellaneous
  • More tea, vicar on disk?Hello, can somebody help me putting the 128k version of this game on disk? The 128k version is free available from Jonathans Webseite. However, the g…

    ... sound is loaded into RAM Bank, but which one? I think ... be able to save whole memory, even memory bank and so create a ...
    Speccyman Speccyman June 2013 Sinclair Miscellaneous
  • Addresses in Fuse debuggerFrom Fuse man page: [I]Addresses can be specified in one of two forms: either an absolute addresses, specified by an integer in the range 0x0000 t…

    ... a location offset bytes into memory bank page, independent of where that ... bank is currently paged into memory. RAM pages are ... /> br 7:0x000F
    (RAM bank 7 and offset 0x000F)
    TK90XFan TK90XFan October 2013 Emulators
  • FS: MOSTEK 4116 DRAM for 48k SpeccysHi I have a bunch of Mostek 4116 DRAMs here for the 48k Speccy - fits in the lower 16k memory bank. They look like NOS unused, still in their origin…

    ... - fits in the lower 16k memory bank. They look like NOS unused ...
    JonB JonB February 2014 Sales
  • 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 ... you load the stuff into memory from tape (or TAP file ... and place them in a memory bank with a routine?

    daveysludge daveysludge May 2014 Development
  • SpecBAS really needs a manual!That Word doc that I converted to an RTF for you Dunny and ASH-II, is still somewhat sparse. I spent bloody hours PLOT/DRAWing a landscape to steer m…

    ... one has to create a memory bank, place the graphic into it ... all create a new graphic bank in memory, and assign the index ... graphic. When creating a graphic bank by specifying the width and ... if not.
    The bank’s memory represents the bitmap surface, row ...
    mik3d3nch mik3d3nch August 2019 Sinclair Basic
  • Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …

    ... music, even in a different memory bank or lace screens on 128K ...
    LCD LCD August 2001 Sinclair Miscellaneous
  • 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 …

    ... be loaded in 128K mode. Memory bank swithing is not possible in ...
    Paul van der Laan Paul van der Laan June 2002 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…

    ... : if you were to use memory bank switching in 128K, did it ...
    Woody Woody August 2003 Games
  • Last speccy game you ever played....................before packing the thing away and leaving your childhood behind. Mine was Where Time Stood Still, 1988 I think.

    ... and an extra 256 MB memory bank) to two years ago.
    Alessandro Grussu Alessandro Grussu June 2004 Games
  • 128 ramdisk loaderanyone got a program which will save the contents of ramdisk to tape in one go, rather than saving each file seperately then loading them and save!in…

    ... Z80 cannot address that much memory at once and there is ... bytes switch to the next memory bank and reset the load address ... . Or more simply, save each bank as a separate headerless 16k ... the first 2C00h bytes of bank 7 should be saved/loaded ...
    John Elliott John Elliott July 2005 Sinclair Basic
  • The best way for converting +D Snapskot > TZX fileI became some +D Disk images with 48K +D snapshots and I had no problems to load them with LOAD D1"XXXXX"S. But what's the best method to convert the…

    ... without trashing some part of memory. You always need to set ... aside some memory for the loader code itself ... utility will use the screen memory for that. The only real ... the loader from an external memory bank that the game doesn't ...
    gasman gasman September 2005 Emulators
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... equ 49152

    ;flip memory bank *only*, without waiting
    ;no ...
    robpearmain robpearmain February 2006 Development
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... is displayed
    2) which memory bank is mapped on 49152 (C000h ...

    ad 2) which memory bank [0-7] is mapped on ... pernamently sitting on 16384 (bank 5) and 32768 (bank 2)
    so ... other words, bank 5 is present two times in memory

    Fikee Fikee February 2006 Development
  • ZXLFN - storing tape header in a long file nameHi lads ;) Couple of months ago, the group of guys interested in divIDE software development has came up with an interesting idea - store tape heade…

    ... RAM bank which isn't paged in? (ditto Timex, interface-specific memory ... load data into a memory bank unless the bank is pages in (unless ...
    icabod icabod July 2006 Emulators
  • My First Mobile PhoneOkay - I need a mobile phone. BUT I need it to do two things - 1 - be able to play my own home made mp3 ringtones ( via a plug in cable sort of dea…

    ... on the massive internal 48K memory bank.


    As to ...
    Collie Collie December 2006 Chit chat
  • My First Mobile PhoneOkay - I need a mobile phone. BUT I need it to do two things - 1 - be able to play my own home made mp3 ringtones ( via a plug in cable sort of dea…

    ... on the massive internal 48K memory bank.
    [/QUOTE]

    Ha ...
    DEATH DEATH December 2006 Chit chat
  • Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…

    ... makes me wonder: How much memory does a Speccy have, included ... the memory used by the machine itself ... />
    The key is in memory bank switching!

    And it ... switch RAM instead ROM in memory MAP - hardware part is done ...
    piters piters March 2007 Hardware
  • Any forums that you are fed up with?I'm not talking about WOS here! Has anyone else become fed up with forums they used to like? I used to love the RG forum, but whenever I visit now …

    ... , can anybody help me with memory bank issues. Also I have a ...
    dm_boozefreek dm_boozefreek April 2007 Chit chat
  • Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…

    ... , the other for the ROM bank register
    - 1 x 74HC32 ... with port 63, and the memory bank with port 31 (bits 0 ... to 4 select the memory bank, bit 5 controls whether the ...
    Winston Winston April 2007 Hardware
<1234567…34>

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