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Search Again :: Adv Search 1000 results in 0.017s
<1…18192021222324…34>
  • RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…

    ... (33277 dec)

    SELECT ROM:
    WRITE to port #02EF ... adressation):[/B]
    MB02+ memory paging:
    WRITE to port #17 ... dec)

    DIVIDE memory paging:
    WRITE to port #E3 ...
    velesoft velesoft July 2010 Hardware
  • Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…

    ... place of the speccy's rom. This is 16k of address ... and so is the largest rom you can page in at ... possible to build cartridges with paging mechanisms, giving you effectively unlimited ...
    guesser guesser July 2010 Games
  • +3 assembler questionI was wondering if anyone could give any suggestions as to how to get this bit of code working on the +2A/+3 in 128k mode. It works on the +128k/+2 i…

    ... in the correct ROM? If you're paging in ROM 1 to call ... get the syntax ROM rather than the BASIC ROM. If it's ... re not setting the last ROM paged system variable and during ... one of the many ROM pages that happens with interrupts ... s returning to the wrong ROM.
    chev chev August 2010 Sinclair Basic
  • +3 assembler questionI was wondering if anyone could give any suggestions as to how to get this bit of code working on the +2A/+3 in 128k mode. It works on the +128k/+2 i…

    ... , it transpires that the 48k ROM paged in by the +3 ... isn't really the 48k ROM - the relevant alteration being that ... $386e-$3cff in the 48k ROM has been patched with various ... the wide blue yonder - probably paging in some +3 stuff as ...
    Battle Bunny Battle Bunny August 2010 Sinclair Basic
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... original idea was just a rom replacement, the ability to use ... .

    without software controlled paging it gets very clumsy when ...
    guesser guesser August 2010 Hardware
  • Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …

    ... .
    ;Since the 48 BASIC ROM is paged in, this is ... disabling any of the 128 paging (which is what happens
    BiNMaN BiNMaN August 2010 Development
  • ZX48K 128K modHas anyone make this mod to the ZX48K? Does it work? [URL]http://hw.speccy.cz/128krebuild.html[/URL] Micky

    ... QUOTE]

    Starting rom with configuration menu:
    [img ... ). Exist also TR-DOS rom versions with 1MB ramdisc support ... memory emulation or ZX rom emulation or DIVIDE memory emulation ... emulate any other memory maping/paging/allram/etc...

    ...
    velesoft velesoft August 2010 Hardware
  • 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…

    ... videoram
    D4 = rom
    D5 = disable paging
    D6 = unused ... videoram
    D4 = rom
    D5 = disable paging
    D6 = unused ... videoram
    D4 = rom
    D5 = disable paging
    D6 = ... videoram
    D4 = rom
    D5 = disable paging
    D6 = ...
    velesoft velesoft August 2010 Hardware
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... e. just being a normal rom) it is as normal, ... ULA used to control that paging are not triggered. This is ... CPU comes in. The rom is paged in over 0x0000 ... also written to the flash rom assuming it's in ... to either of the high rom banks. The flash utility therefore ...
    guesser guesser August 2010 Hardware
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... /> [/URL]
    The slightly weird paging is detailed in this image ... .no-ip.org/public/flash/rom%20paging.png[/URL]
    [URL ... .no-ip.org/public/flash/paging.txt[/URL]
    guesser guesser August 2010 Hardware
  • ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…

    ... basic or with access to paging port. All original versions of ... 128 automatically detect ROM 0(128 editor) or ROM 1(48 basic ... on mapper points for each rom.
    velesoft velesoft August 2010 Development
  • ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…

    ... original Divide with posibility emulate rom flashing or install divide ... PLUS or any other hardware. Rom flasher is free software ( ... ATM with extra trdos rom with software emulation of ... SAM COUPE mode (emulate memory paging from SAM COUPE computer) - combined ...
    velesoft velesoft August 2010 Development
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... ]* 16 kB EPROM or flash ROM[/quote]
    Only 16kB ? ... MB02+ support up to 512kB rom (or flash eprom - exist ...
    - compatibiliy with DIVIDE memory paging (mutant between MB02 and DIVIDE ... mode in full configuration 512kB rom+512kB ram and support up ...
    velesoft velesoft September 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... MB02+ support up to 512kB rom (or flash eprom - exist flashing ... as well as the divIDE paging we should talk how to ... do.

    The readable paging port should be no problem ...
    ingo ingo September 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... different RESET code.
    - readable paging port
    ...
    - IM2 vector ... mode in full configuration 512kB rom+512kB ram and support up ...
    ingo ingo September 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... , then CPU jump to BS-ROM with write protect to adress ... ! Also BS-DOS and BS-ROM can be install to any ... pages, only NMI always reset paging port :-(

    - Original NMI ... and jump always to MB02 rom 0 to adress #00.
    velesoft velesoft September 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…

    ... 32K, which means disabling the ROM, moving the stack, and ...
    di ; disable interrupts before paging
    ld (sp_save+1),sp ... br /> or rom0_off ; disable ROM 0
    out (lmpr),a ...
    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…

    ... use the Spectrum ROM and environment just for some paging tests!
    paging
    push af

    out (vmpr),a ; restore video paging
    ei
    ret
    obo obo September 2010 Development
  • 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…

    ... PLUS use also MB02 memory paging port = is compatible with MB02 ... only end of 512kB rom (this is unused rom space)

    velesoft velesoft September 2010 Hardware
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... use individual 16k rom images, not the combined rom images that some ... /> Andrew recommends flashing the SE rom to all four banks of ... in case something activates the paging so it doesn't crash ... basic, and the original spectrum rom for compatability. All with a ...
    guesser guesser September 2010 Hardware
  • 128kefrom the scratchpad for the 128ke "Finally, reading from a non-existing port (eg 0xff) will give the screen/attribute bytes as it does on the 48K/12…

    ... mode, or with the 128ke rom set sort that out?
    paging locked mode.

    on ... to the 48k rom and locks all the paging until the machine ... to run.

    what rom are you using, and what ...
    guesser guesser September 2010 Hardware
  • DMA interface for ZX Spectrum[url]http://velesoft.speccy.cz/data-gear.htm[/url] This is internal DATA-GEAR interface for any 8-bit computer with Z80CPU. Use Direct Memory Access…

    ... difference if it transfers from rom area to ram or for ... +2a rom area? could use external multiface ... 8kb available but would need paging first
    coudl make proportional ...
    Roger Jowett Roger Jowett October 2010 Hardware
  • Alien8 will not run on Divide?I can't seem to get Alien8 running on my 128+ with Divide. I have the original tape and have loaded into an emulator to create a snapshot, (.z80) an…

    ... ,#7E or #00 to memory paging port #7FFD on ZX128/+2 ... to USR 0 mode (48 rom with enable 128kB memory)
    rom with 48kB memory) - ideal for ...
    velesoft velesoft October 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…

    ... " you mean whatever the BASIC ROM sets it as then you ... you are already paging out the SAM ROM then forget all about ... to the SAM way of paging you will love it! It ...
    Chris Pile Chris Pile October 2010 Development
  • ANN: EsxDos 0.73 released (third party - not mine)Papaya Dezign have finally released their firmware/OS for the DivIDE interface. Go get it from [url]http://www.esxdos.org/files/esxdos073.zip[/url]…

    ... original Divide with posibility emulate rom flashing or install divide ... PLUS or any other hardware. Rom flasher is free software ( ... ATM with extra trdos rom with software emulation of ... SAM COUPE mode (emulate memory paging from SAM COUPE computer) - combined ...
    -Micky -Micky November 2010 Development
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... plug 'n' play shadow based ROM link with a constant full ... as they require the memory paging lock to be active. Let ...
    ASM ASM 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…

    ... 1MB (512kB rom + 512kB ram) with MB02 compatible paging. This memory ... can be connect instead ZX rom and ... for extra memory paging. Is possible reflash rom chip in DIVIDE ... Will work RESIDOS and memory paging on DIVIDE PLUS. 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…

    ... other interface with external memory rom/ram or old kempston joystick ... is writed to DIVIDE PLUS paging port 23 (set incorrect ... Will work RESIDOS and memory paging on DIVIDE PLUS. On this ... disable connection of external memory rom/ram on all devices connected ...
    Alien 8 Alien 8 November 2010 Hardware
  • ROM interface add-ons?Is there a summary description of various ROM interface add-ons, listing things like number of multiple ROMs holdable, compatibility with Interface 1…

    ... a summary description of various ROM interface add-ons, listing ... Each this interface use different paging ports and features. My PROFI ... any part of 512kB rom as ZX rom replacement or can emulate ... allram mode and can emulate rom with write protected external ...
    velesoft velesoft November 2010 Hardware
  • 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…

    ... crash. The patch also disables paging allowing some games to work ... /> ld a,00000100b ; Vertical ROM select/count
    out (c ... table for Spectrum +3/2a ROM.


    change_tab ... hardware devices that shadow the ROM, any comments?

    ...
    ASM ASM November 2010 Announcements
<1…18192021222324…34>

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