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Search Again :: Adv Search 1000 results in 0.022s
<1234567…34>
  • Problem with Page 7I've been experimenting with running code in page 7 (+3) from BASIC and I seemed to have got it sorted out but then it all went wrong. Firstly, I tr…

    ... experimenting with running code in page 7 (+3) from BASIC ... LD BC,$ffff : RET" in page 7

    So then ... POKE 23388,16+7: OUT 32765,16+7: PRINT USR 65368 ... POKE 23388,16+7: OUT 32765,16+7:
    FOR ... "LoadCODE" were now in page 7 starting at 65368 (ie. ...
    Battle Bunny Battle Bunny January 2013 Development
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... -7)

    page 0 - fast ram
    page 1 - slow ram
    page 2 - fast ram ... (videoram 1)
    page 6 - fast ram
    page 7 - slow ram (videoram 2)
    ram page (no mirrored with videoram 1)
    page 6 - fast ram
    page 7 - fast ram ...
    velesoft velesoft March 2011 Hardware
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... with the "shadow" screen area at the start of page 7 in any ... me to manually page in ROM 3 and RAM 0, and ... the 128k editor, if page 7 is mapped in at c000h ... that some RAM is used for the stack from page 5. ... Does this not corrupt the basic program in RAM ...
    rbsfou rbsfou January 2007 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…

    ... and on its place the RAM is connected.

    ...
    Bit 3 - Management of shadow ROM. If 0 you get ... to an additional (Free) page of ROM. This mode has ... . connection of an additional page of ROM occurs regardless of ... 6,3
    A=7 for RAM 4,7,6,3
    < ...
    ajmoss ajmoss August 2010 Hardware
  • Z80 snapshot formatI read documentation for Z80 snapshot on WOS and see in table possibility insert ROM image to Z80 file. Here is full table: [code]The pages are numb…

    ...
    6 - page 3 Shadow 8000-bfff
    7 - page 4 Shadow c000-ffff
    ram pages from Z80 snapshot and ...
    velesoft velesoft August 2012 Emulators
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... question is how much RAM is corrupted in page 7. Page 7 is used as ... is no longer necessary, rebuild page 7 back in place and execute ... think that "corrupted" areas in page 7 would be small enough to ... me load most data in page 7 directly (everything below 6k would ...
    Zup Zup December 2012 Games
  • +D/Disciple games archive?Hi all, Having finally got my disciple to work, I'm starting to have a look at hacking multiload games. Is there any archive on the web with games t…

    ... digit to a number 0-7. Then the special "nopd" ... code into the jlo's shadow ram -- more on that below. ... next level in the disk RAM. This takes 6 bytes, ... that the +D has a shadow RAM just like the jlo does ... jp LLTRAP" to page in the +D disk RAM in the 0 ...
    Alcoholics Anonymous Alcoholics Anonymous May 2004 Sinclair Miscellaneous
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... the "shadow" screen area at the start of page 7 in ... area in page 7 (but the remainder of page 7 should ... The editor switches between page 7 and page 0 (where the ... some RAM is used for the stack from page 5. ... Does this not corrupt the basic program in RAM ...
    glancaster glancaster July 2009 Development
  • 'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…

    ... screen already stored on the RAM disk as filename "scr", like ... 't get loaded to the shadow screen, so you get one ... page is paged in, but that page doesn't seem to be page 7 ...
    mulder mulder April 2010 Sinclair Miscellaneous
  • Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…

    ... between a lower Ram read by the CPU (Always page 5) and ... a lower ram read by the ULA (Page 5 or 7 ... depending on the shadow ram pin), so ... i havent been able to implement the shadow ...
    spodula spodula February 2011 Hardware
  • A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …

    ... two video RAM pages of the 128 (page 5 and 7) combined ... use hi-res mode in page 7 for the sake of ... in at offset 0x0000 of page 5. I've already ... for the most common code page (Windows 1252):

    ... RISC co-processor which the shadow ROM uses to perform ...
    chev chev September 2012 Hardware
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... page 7 seems to be free. The first 6912 bytes (the shadow ... other consideration is the DOS/RAM buffer extents, initially occupying ... number & location, so RAM buffers can be set to ... 31 are in page 1, 32-63 in page 3, etc. ... a permanent one in page 7 at $e090.
    Battle Bunny Battle Bunny December 2012 Games
  • Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…

    ... while I setup my screen ram[/quote]
    from which I ... be printed to the temporary ram area instead so it is ... you using the shadow screen area in page 7 to hold the screen ...
    Battle Bunny Battle Bunny February 2014 Development
  • Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…

    ... you using the shadow screen area in page 7 to hold the ... image directly to screen ram where I then printed ... printed) depacked to free ram for the reveal fx ( ... depack direct to colour ram to display the image ... in free ram and I depack it to the shadow area ...
    Speccy_James Speccy_James February 2014 Development
  • Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…

    ... currently has 32K of video RAM (henceforth VRAM), split into 4x8K ... shadow screen on the 128K spectrums start at the beginning of page ... 5 and page 7, ZX Prism screens start ... contains screens 0 and 1, page 7 contains screens 2 and 3 ...
    JeffB JeffB July 2014 Hardware
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... and RAM drive
    3) Directly decompress loading screen to page/bank ... ) Directly decompress page/bank 7 (0xc000 to 0xdb00) to page/bank 7 (shadow screen only ... )
    11) Directly decompress page/bank 5 ...
    TomD TomD May 2019 Development
  • Betadisk RAM modificationHello! I've ocassionally found this on the web: [url]http://www.nairam.sk/betadisk.html[/url] [url]http://www.nairam.sk/betadisk_02.gif[/url] Doe…

    ... that it adds a little shadow RAM into betadisk to be paged ...
    Sonic Sonic December 2006 Hardware
  • How to call plus3dos from high ram?Hello. I'm working in basizx disk access in spectrum version. The problem is tha basizx code is loaded in addresses above C000h, and plus3dos must b…

    ... plus3dos must be called with page 7 mapped in that range, and ...
    NotFound NotFound January 2007 Development
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... /> org $8000 ; run in fast RAM

    di ; disable interrupts ... />
    ; copy BASIC ROM to RAM

    ld hl,$0000 ...
    ldir ; copy

    ; page shadow RAM into ROM area

    chev chev March 2007 Emulators
  • So... you want to format your 3.5" as 720K eh?Well, i've been trying to get hold of an application to make proper use of my 3.5" +3 floppy disks but i haven't been able to find any. I stumbled up…

    ... ,A ; B holds the RAM page in use during operation, C ... /> OUT (C),A ; Page ROM 2 and RAM PAGE 7
    POP BC
    LD A,16 ; Page ROM 0 and RAM PAGE 6
    LD ( ...
    NaMcO NaMcO December 2008 Development
  • 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 …

    ... pages) to identical page in 1MB memory
    Page 5 must be ... as ZX128
    - page 5 is additional page, not mirrored to adress ... space 16384-32767
    - page 2 is morrored to adress ... second ZX videoram, page 7 is used only as ram
    - in adress ...
    velesoft velesoft April 2010 Games
  • TESTROM3 - utility/rom for test your ZXHere is TESTROM3 utility as 16kB ROM file + flasher for install this rom to divide eeprom (or mapram mode). Work also on ZX Spectrum without ROM and …

    ... write byte with page number to each 8 ram pages and verify ... color actual
    tested ZX ram page (7=white,6=yellow,5=cyan ... line sign number of bad page). After sign error cintinue in ... menu.

    TEST FAST RAM
    =============
    Test only fast ...
    velesoft velesoft August 2012 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…

    From Fuse man page:

    [I]Addresses can ... to 0xFFFF or as a `page:offset' combination, which refers to ... page, independent of where that bank is currently paged into memory. RAM ... :

    br 7:0x000F
    (RAM bank 7 and offset 0x000F)
    TK90XFan TK90XFan October 2013 Emulators
  • 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…

    ... br /> --------------------------
    ROM and RAM in More Detail
    --------------------------
    - DOS in ram: more commands/funtionality can be ... +3 except it uses page 7 so it suxx)
    ... , but there are more ram pages available.
    < ...
    bverstee bverstee October 2015 Hardware
  • Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…

    ... infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross ... linked from the SofU page.
    On my ... loader uses ram page #4 for rom, and ram page #4 should ... whether the WoS page about contended ram pages on +2A ... ]correct?
    Is the ram page #4, when paged in ...
    Kio Kio February 2016 Games
  • Unexpected issue with +3DOS port of Pro BMX SimulatorI'm continuing to port my tape-based games to 3-inch disk (you may have noticed my previous post about PSSST!). Today I started on Pro BMX Simula…

    ... , which is loaded into RAM page 1 (at 0xc000), so ... load the music into RAM page 3 (updating the main ... it didn't work with RAM page 1. Naively, it ... using the start of page 1 for some working ... guide: just reference to RAM page 7 being used for temporary storage ...
    Georgeo Georgeo March 2018 Development
  • Direct drive LCD screen - looking for information on previous projects people may have attempted.Hi All, My first post, so please forgive and guide if I've posted in the incorrect section. I'm a speccy user from way back in the 80's, but m…

    ... was working on building a shadow RAM ( 16K dual-ported memory ) that ... it directly to a 5.7" 320x240 LCD panel, with some ...
    cj7hawk cj7hawk December 2020 Hardware
  • Hardware specialists ?????Are there any Sinclair hardware specialist around here? I think most of you are more gamers and I need a hardware specialist for some questions!!!!

    ... 4-5-6-7 memory mode and make page 7 the active screen ... above mentioned pages are video RAM.

    Best wishes,
    secarica secarica April 2002 Sinclair Miscellaneous
<1234567…34>

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