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Search Again :: Adv Search 1000 results in 0.021s
<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
  • 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…

    ... or attribut value). If you disable memory paging(OUT 32765,48 ), 128 port ... ]

    This GAL chip disable 128port reading (write only) and ...
    velesoft velesoft October 2007 Development
  • list of ZX games with raining effect(ula snow)If you know any ZX games with raining effect in screen, then add game name to list. I know about this games only: (tested on real ZX128+2 - grey) 4x…

    ... /> This OUT set slow memory page 7 and disable memory paging. If 48k game ...
    velesoft velesoft April 2008 Games
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... a warning message when the memory safety limit is exceeded. ... requires one BYTE of memory to be added to ... Added new command /d to disable memory paging for compatibility issues on 128K ... .

    /d - Disable 128K memory paging.
    /f - Forced +3/ ...
    ASM ASM November 2010 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 ... using those bits for extra memory switching and if it happen ... 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
  • 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…

    ...
    512kB FLASH EPROM
    memory paging compatible with ZX Profi 1024 ... /> - software controlled NMI button
    - memory paging compatibilty with all popular russian ... /> - russian CACHE emulation
    - possibility disable acces to low 16kB for ...
    velesoft velesoft December 2009 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 ... 1MB external memory for SAM COUPE enable also memory paging in high ... rom 128/48
    D5 = disable port 32765
    D6 = unused ... 3) disable AY sound
    4) export all used memory pages to ...
    velesoft velesoft April 2010 Games
  • 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
  • New ZX-Uno Spectrum CoreFor those who haven't noticed, a new Zx-Uno Spectrum core has been published: http://www.zxuno.com/forum/viewtopic.php?f=14&t=406 Those lucky e…

    ... - It is now possible to disable some interfaces: DivMMC, AY, ... second AY (disable turbosound), ULAplus, Timex screen modes ... It's possible to setup memory paging so it works exactly as ... ).
    - Timex MMU (memory handler) is now included (disabled ...
    Uto Uto June 2016 Hardware
  • New Utility ZXSTLC[b]New Utility ZX Spectrum Tape (& Disk) Loader Creator[/b] I made this utility to easily create tape and +3 disk loaders for my projects and have…

    ... normally composed
    | of memory banks 5, 2 and 0 ... /> | containing only the standard memory pages (5, 2 & ... For 128k programs with additional memory pages you
    | need ... to start
    | @ memory position 0xC000 (49152), even if ...
    TomD TomD August 2020 Brand new software
  • 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 …

    ... , the contended RAM.
    Normal memory paging is extended by EPaging which ... needed.

    Paging

    The memory is roughly designed to ... /> D4 - ROM select
    D5 - Disable paging (and epaging? Might be useful ...
    cyborg cyborg October 2002 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…

    ... 48 rom with enable 128kB memory paging. For switch from 128 ... will disable 128kB memory and will available only 48kB memory without paging.
    memory is available):
    [url ... .cz/other/zx128rom-enable-paging-in-48-basic.zip[/ ...
    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…

    ... with all the 128k memory and bankswitching still fully ... 48 rom with enable 128kB memory paging. For switch from 128 ... will disable 128kB memory and will available only 48kB memory without paging.
    memory paging enabled, so no memory is lost and ...
    ewgf ewgf December 2008 Sinclair Miscellaneous
  • FatWare source codeHi, Does anyone have the latest FatWare source code for the DivIDE? I've e-mailed Baze about it but got non-delivery notices. The last I heard he'd…

    ... /> - need disable IM2 interrupt in screen backup time (divide memory paging)
    - is ...
    velesoft velesoft January 2009 Hardware
  • BSDOS 309 for MB02+ by DuskyI heard, there is a new version of BSDOS 309 for the MB02 disc interface coded by DUSKY (Nick: UB880D). I have three pieces of MB02 (including a prot…

    ...
    (it's my MB memory interface + connected DIVIDE : [url]http ... MB IDE ports with MB02 memory paging)


    [QUOTE=LCD ... the BSDOS 309 does not disable the DMA, but it does ...
    velesoft velesoft April 2009 Sinclair Miscellaneous
  • 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 …

    ... based on similar experiments with memory paging I think that although there ... need to disable interrupts during the actual moment of paging. Sorry if ...
    roko roko 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 …

    ... ) routine for install all 128kB memory pages from SAM COUPE ram ... %.... some games/software use different memory paging routines combined with access to ... file must be find and disable all access to AY ports ...
    velesoft velesoft April 2010 Games
  • Message to all programmersHello folks, more and more programmers in the recent time are using special loading routines for their Homebrew-Software. This makes their game runn…

    ... very sure how safe is memory paging from basic.
    has anyone ... me that the games can disable features if they think, they ... by checking if the free memory is not ocupied by decompressor ...
    LCD LCD August 2010 Development
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... kB memory
    D3 = videoram
    D4 = rom
    D5 = disable paging
    memory
    D3 = videoram
    D4 = rom
    D5 = disable paging
    D6 = bank 3 ;256 kB memory
    D7 ...
    velesoft velesoft August 2010 Hardware
  • SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…

    At Chris said, memory paging is key to getting ... />
    di ; disable interrupts before paging
    ld (sp_save+1 ... page_mask
    or rom0_off ; disable ROM 0
    out (lmpr ...
    obo obo September 2010 Development
  • SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…

    ... mode. SAM COUPE basic disable direct memory switching and testing from machine ... 's another sample without any memory paging, setting only the display to ... /> out (vmpr),a ; restore video paging
    ei
    ret
    obo obo September 2010 Development
  • How compatibel is the Sprinter 2000?How compatibel is the Sprinter 2000? I have one but only trd software runs. Joystick did not work and tape in and tape out too. I have schematics bu…

    ... in normal speed 3.5MHz (disable turbo 21MHz).

    ... /Scorpion), turbo on/off, memory size 128/256/512kB/4MB ... !!! Sprinter use different adressation of memory paging ports, then can be problem ... using uncomplette ports adressation or paging via LD A,xx + ...
    velesoft velesoft September 2010 Hardware
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... using a 256 BIT memory fetch. The entire instruction ... includes inctructions that read/write memory. Again, the data ... overhead of the Windows memory paging system virtualizing the location ... The Spectrum is easy - disable those interrupts, avoid contended RAM ...
    ASM ASM October 2010 Development
  • divide deviceHi, This is first my first post,so hello to you all I first Spectrum 48k was a Xmas present way back in 1983,best gift ever. Then I moved on to a C…

    ... ram) with MB02 compatible paging. This memory can be connect instead ... OUT 23,xx for extra memory paging. Is possible reflash rom ... . Will work RESIDOS and memory paging on DIVIDE PLUS. On ... new connector. This disable connection of external memory rom/ram on ...
    velesoft velesoft November 2010 Hardware
  • divide deviceHi, This is first my first post,so hello to you all I first Spectrum 48k was a Xmas present way back in 1983,best gift ever. Then I moved on to a C…

    ... any other interface with external memory rom/ram or old ... any other devices with external memory. This devices is yet ... collision. Will work RESIDOS and memory paging on DIVIDE PLUS. On this ... new connector. This disable connection of external memory rom/ram on ...
    Alien 8 Alien 8 November 2010 Hardware
  • Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…

    ... in Tygrys selector disable 128kB memory or only start ... 1) original mode (divide memory mapping work always - as ... 3) 48kB mode with disable 128kB memory (for bloblematic games - ... 128kB enable/disable (yes, it's possible disable 128kB memory paging via ...
    velesoft velesoft November 2010 Hardware
<1234567…34>

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disable 1.8K 2.2K
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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 …
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  • 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…
  • 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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