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Search Again :: Adv Search 1000 results in 0.017s
<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
  • 128 ROM paging alternativeWould this work (with the appropriate code in each ROM)? [code] ; 128 rom paging routine ; use rst 28h with call address stored after restart ;;rom…

    ... )?

    [code]
    ; 128 rom paging routine
    ; use rst 28h ...

    ;;rom0

    paging
    org 0x0028
    ld ...
    chev chev August 2008 Development
  • 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
  • Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…

    After all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory.

    How do I go about implementing this in machine code?

    Thanks in advance...
    daveysludge daveysludge March 2014 Development
  • 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
  • Real Spectrum screen flicker with SCREEN$I've written a basic loader to simply do a 'load "" screen$' based video from a divide+ however I'm finding the Spectrum can't render a screens and a…

    ... want to try something in 128 mode, give this a go ... mode (enter 'usr 0' from 128 basic which will crash the ... 48k mode from which the 128 memory paging is still available):

    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • Real Spectrum screen flicker with SCREEN$I've written a basic loader to simply do a 'load "" screen$' based video from a divide+ however I'm finding the Spectrum can't render a screens and a…

    ... want to try something in 128 mode, give this a go ... mode (enter 'usr 0' from 128 basic which will crash the ... 48k mode from which the 128 memory paging is still available)
    [/QUOTE ...
    brownb2 brownb2 March 2010 Development
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... with the NMI browser - (using 128 toast rack and grey +2 ... seem to mess with the 128 memory paging.
    tornado assembler and machine ...
    madvanman madvanman September 2012 Announcements
  • 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
  • ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …

    Assuming the Spectrum 128 memory map and port addresses, but ... ROM-1, which means the paging code needs to skip those ... /> The RAM part of the paging routine should live at 23296 ...
    chev chev January 2006 Development
  • 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
  • RGB on speccy ?hi, just a question : are you aware of scene demo trying emulate rgb ? i was a bit ill last few days so laying in bad i come with a (stupid ?) idea.…

    ... attribute data per scanline. 128 screen paging does help in one way ... Contour graphics mode on a 128 - the one where each ... ]

    Even with screen paging at your disposal, this requires ... , but on a real Spectrum, memory contention eats up too much ...
    gasman gasman November 2008 Development
  • 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
<1234567…34>

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128 9.4K 14.8K
memory 21.8K 32.5K
paging 1.7K 2.4K

Related Threads

  • 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…
  • What is difference between "128" and "128+"?What is the difference between a "Spectrum 128" and a "Spectrum 128+" ??<br /> <br /> And I am not talking about the different looking +2's, etc.<br …
  • Changing MP3's from 128+ to just 128I have a number of MP3's that are bigger than 128 bit rate and i want to convert them all in one go to 128. <br /> <br /> Could you guys recommend s…
  • 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…
  • 128 ROM paging alternativeWould this work (with the appropriate code in each ROM)?<br /> <br /> [code]<br /> ; 128 rom paging routine<br /> ; use rst 28h with call address sto…
  • 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 …
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