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<1234567…34>
  • 128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …

    ... problem getting my brain around paging. Well, actually the bit I ... />
    Port 32765 controls the memory paging. Bits 0-2 determine the ...
    trellis trellis August 2003 Sinclair Basic
  • 128kB software with incorrect memory pagingI search all ZX software using incorrect memory paging via OUT (253),A. This software must write to port data value with D6=1 for compatibility with …

    ... all ZX software using incorrect memory paging via OUT (253),A. This ... use on this computers different memory pages.
    velesoft velesoft March 2010 Games
  • 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 you ...
    ivanb303 ivanb303 January 2018 Development
  • Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…

    ... /> twice the amount of memory than can comfortably fit. While ... br /> paging - BASIC (and the processor) always 'sees' the memory as 16K ... to "disconnect" the ROM memory completely and to write to ... lowest 16 KB of memory with proper paging?
    I always ...
    Ralf Ralf March 2008 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 512K model ... the Basic command SPECTRUM on +128/+2, that also turn that ... 3 / port DFFD for extra memory paging.
    What is ZX PROFI ... any established port for extra memory, other than the Pentagon road ...
    secarica secarica September 2004 Sinclair Miscellaneous
  • RUSSIAN SOFTWARE and real ZXRussian ZX games is writed on russian ZX clones and support hardware feature TURBO OFF ( for ZX clone ZS SCORPION ). Russian ZX clone ZS SCORPION use…

    ... used on ZS SCORPION for memory paging and reading this ports is ... different functions) used too for memory paging. Read of this ports is ... is on original ZX Spectrum 128 / +2 (grey) models. This ... floating bus is writed to paging port).
    Read port # ...
    velesoft velesoft October 2008 Games
  • New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…

    ... ZX Profi 1024, Pentagon 128-1024, ZS Scorpion 256- ... /> memory paging compatible with ZX Profi 1024, Pentagon 128-1024, ... memory)
    Speed-up slow ZX memory (contended memory ... controlled NMI button
    - memory paging compatibilty with all popular russian ...
    velesoft velesoft December 2009 Hardware
  • Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …

    ... COLOR="Green"]On the 128 and +2, memory is entirely controlled by ... this does not affect the memory between 0x4000 and 0x7fff, which ... />
    Bit 5:If set, memory paging will be disabled and further ... thus:

    Bit 0: Paging mode. 0=normal, 1=special ...
    bverstee bverstee April 2010 Hardware
  • converting ZX128 software for SAM COUPESAM COUPE is computer compatible with ZX48 model. Use same ports, same keyboard with compatible membrane, 64kB adress space with possibility connect …

    ... blocks - on ZX128 is possible memory paging only in high 16kB. This ... , enable external memory in high 32kB, set port 128 to value 2 ... ://velesoft.speccy.cz/other/sam-128-dir.png[/img]
    < ... sam-128-loader.png[/img]

    Additional info about 1MB memory ...
    velesoft velesoft April 2010 Games
  • 128kB snapshot on ZX48kBWhat is best way for 128kB snapshot loading on 48kB models ? Some Z80 snapshots are 128kB versions (Z80 v2 or v3) but contain 48kB games. Same proble…

    ... models load only 48kB of memory from 128 snap and to last ... system. New snapload enable loading 128 snaps on 48kB models with ... of port 7FFD. 128 snapshot with locked memory paging is same as 48 ...
    velesoft velesoft August 2012 Emulators
  • Enable 128kB paging in emulatorFrom Zx Spectrum documentation ([url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]) [CODE][SIZE="1"]When memory is being pag…

    ... />
    [CODE][SIZE="1"]When memory is being paged, interrupts should ... this does not affect the memory between 0x4000 and 0x7fff, ... Red"]Bit 5: If set, memory paging will be disabled and further ... a .z80 snapshot where paging was disabled before saving and ...
    Ralf Ralf June 2013 Emulators
  • DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…

    ... sram + 512kB flash eprom.
    Memory paging in this device is enable ... .

    Divide ram paging bits on port #E3 (write ... for this 128kB paging port very easy:
    - Paging port adress # ...
    I name this new paging mode "DIVIDE128". Systems in this ...
    velesoft velesoft June 2013 Hardware
  • Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…

    ... description of most popular BETADISK 128:

    [COLOR=" ... /> [U][B]Description of Betadisk 128[/B][/U]

    ... type and always enable betadisk memory paging mechanism. Then after reset ... addressing in original BETA DISK 128:
    [code]ADRESS ...
    velesoft velesoft August 2013 Hardware
  • Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …

    ... about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing ... between HD FDD and ZX memory. Interface contain also RTC chip ... FDD booter and [B]RAM 128-512kB with battery backup[/B ...
    velesoft velesoft August 2013 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

    128 Speccy cores for it (the ... ZXMMC.
    The DivMMC memory mapping is compatible with that ... other ports.
    The memory paging port is compatible with port ...
    bverstee bverstee October 2015 Hardware
  • 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…

    ... br />
    On the 128 and +2, memory is entirely controlled by ...
    Bit 5 If set, memory paging will be disabled and further ... editor scratchpads.

    Memory banks 4-7 are contended ... typical bank switch on the 128 is:
    LD A,( ...
    Fikee Fikee February 2006 Development
  • Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…

    ... to 128 page port(FF or attribut value). If you disable memory paging ... (OUT 32765,48 ), 128 port reading / writing ...
    velesoft velesoft October 2007 Development
  • New Spectrum game - Isotopia by OctocomOctocom, the guys who made BASIC programmed games such as Pandemia or Insert Coins, released yesterday their very first compiled BASIC game: Isotopia…

    ... there separate versions for the 128 & +2, and the +2A ... make a difference are the memory-paging & contention timing differences, but ...
    bobs bobs December 2007 Games
  • New Spectrum game - Isotopia by OctocomOctocom, the guys who made BASIC programmed games such as Pandemia or Insert Coins, released yesterday their very first compiled BASIC game: Isotopia…

    ... there separate versions for the 128 & +2, and the +2A ... make a difference are the memory-paging & contention timing differences, but ... use different syntax. In the 128/+2 you do it with ...
    na_th_an na_th_an December 2007 Games
  • Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…

    ... memory(basic) and set 48 rom with enable 128kB memory paging. ... For switch from 128 basic to ... disable 128kB memory and will available only 48kB memory without paging.
    memory is available):
    ...
    velesoft velesoft December 2008 Sinclair Miscellaneous
  • Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…

    ... 48kB memory(basic) and set 48 rom with enable 128kB memory paging. For ... switch from 128 basic to 48 ... use 48K ROM with memory paging enabled, so no memory is lost and ...
    ewgf ewgf December 2008 Sinclair Miscellaneous
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... with 128 editor(rom 0). As first you must copy memory 3D00 ... but for each ZX128 model (128/+2/+3) must be used ... routines for write commands in 128 basic.
    [img]http://velesoft ... true allram mode with 16kB memory paging with selectable write protect !!! All ...
    velesoft velesoft January 2009 Hardware
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... />

    [QUOTE]128 BASIC is overrated. ResiDOS provides ... extra commands without requiring the 128 editor ROM.[/QUOTE]
    ...
    Divide compatibility with 128 rom is good for correct ... DIVIDE ide ports + MB02 memory paging(or any other with RESIDOS ...
    velesoft velesoft January 2009 Hardware
  • !!! Trdos Emulation On Zx !!![B]This is software emulator of TRDOS(betadisk). Yet is writed only for interface MB02+, but will ported to more other IDE interfaces with external r…

    ... br /> All ZX models (ZX48/128/+2/+2A/+3)

    memory automapper compatible with some other ... 512kB,boot-rom,ide-ports. Memory paging via OUT 23,xx command ... only (hasn't memory automapper = problem with TRDOS emulation ...
    velesoft velesoft May 2009 Development
  • ANN: ResiDOS v2.25 and +3e ROMS v1.38 releasedA major new release of ResiDOS, v2.25, is now available! The most important new features are commands and functions allowing new extended streams an…

    Garry: Use RESIDOS memory paging often ? Is possible write RESIDOS ... virtual memory on HDD. DivIDE support true allram mode with 16kB paging ... RST adress is OUT 227,128 = connect 8kB DivIDE eeprom with ... from HDD/CF to DivIDE memory. This operation is very fast ...
    velesoft velesoft July 2009 Hardware
  • ANN: ResiDOS v2.25 and +3e ROMS v1.38 releasedA major new release of ResiDOS, v2.25, is now available! The most important new features are commands and functions allowing new extended streams an…

    ... 367559]Garry: Use RESIDOS memory paging often ? Is possible write RESIDOS ... memory on HDD. DivIDE support true allram mode with 16kB paging ... RST adress is OUT 227,128 = connect 8kB DivIDE eeprom ... each BASIC call, the following paging operations occur:
    [LIST ...
    glancaster glancaster July 2009 Hardware
  • Multiload in 48K, single load in 128KIs there a list that reflects which games were multiload in 48K and had single load in 128K? (i.e.: I think Rainbow Islands loaded all levels in 128K…

    ... levels is loaded to 128 memory !!! And this 128 remix is also with ... all russian ZX clones (corrected memory paging). All in one TAP file ...
    velesoft velesoft September 2009 Games
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... the 128K ULA for the memory paging, amongst other things.[/QUOTE]
    memory an ay support. But then ... /> Other than that, doable. :-) the 128 ula specifics are not difficult ...
    csmith csmith November 2009 Emulators
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... that work on the original 128 that don't work on ... mode (because they call the memory paging ports). There are an even ... BASIC ROM and the UK 128 editor (patched to work with ...
    chev chev January 2010 Games
  • Converting games from tap to dskHi to all from Greece, Being an old Speccy user and now owner of most models of Spectrum (48k , 48k+ , 128K, +2 grey and +3) , I desided to salvage m…

    ... did for Jet Set Willy 128: Any code intended for banks ... /> LD A,(5B5Ch) ; restore the memory paging that BASIC expects
    LD ... DOS READ with the correct memory bank set up.
    John Elliott John Elliott January 2010 Emulators
<1234567…34>

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memory 21.8K 32.5K
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  • 128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
  • Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS)<br /> <br /> --------------------<br /> In the +3, we have crammed in more than<br /> tw…
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