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<1234567…34>
  • Channel redirectionHi! I need help regarding the following problem. I want a BASIC decoder running on Spectrum, written in assembler. I found the great *LIST routine […

    ... printer buffer is a bitmap buffer, not a character buffer. It ... ,(bufindex) ; Get pointer to buffer
    LD (HL),A ... INC HL ; Point to next buffer location
    LD (bufindex),A ; ... Store new buffer pointer
    AND A ; ...
    Jonathan Harston Jonathan Harston December 2007 Development
  • +3e ROMs v1.36 & ResiDOS v2.06 releasedI've released an update to the +3e ROMs, which are now at v1.36. The main change here is the removal of some old ATA drive detection code at reset, …

    ... on - whatever was in the +3dos buffer prior to the copy, I ...
    icabod icabod April 2008 Announcements
  • +3e ROMs v1.36 & ResiDOS v2.06 releasedI've released an update to the +3e ROMs, which are now at v1.36. The main change here is the removal of some old ATA drive detection code at reset, …

    ... on - whatever was in the +3dos buffer prior to the copy, I ...
    glancaster glancaster April 2008 Announcements
  • What memory pages are being used in a +3DOS disk operation?To make a long story short: what pages are in use by +3DOS while doing read operations from the disk drive? Now, for the details, for those interest…

    There's the +3DOS buffer cache -- that's (IIRC) 4k, ...
    John Elliott John Elliott March 2011 Development
  • Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…

    ... buffer of the attributes. So basically 1 byte per character location ... . Each character location on screen relates to a shadow buffer location ... you set the shadow buffer locations to non-zero.< ... locations in the shadow buffer are clear draw the ...
    David Jones David Jones October 2013 Development
  • Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…

    ... buffer of the attributes. So basically 1 byte per character location ... . Each character location on screen relates to a shadow buffer location ... you set the shadow buffer locations to non-zero.< ... locations in the shadow buffer are clear draw the ...
    Morkin Morkin October 2013 Development
  • Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…

    [quote="Atari_Jetman;51196"]My buffer is 22x26 chars however the ... .[/quote]
    It seems your buffer could be 20x26 chars instead ... , but if you choose your buffer location properly, you can avoid placing ...
    Einar Saukas Einar Saukas September 2015 Development
  • The ZX printer buffer in +3 modeI have a few programs on .DSK images that were transferred from Timex disks, but some of them have code starting at 23296. Most of the time the code …

    ... and use the printer buffer area while in +3DOS? I'm trying ...
    zxbruno zxbruno December 2008 Sinclair Miscellaneous
  • 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…

    ... is used as "scratch" in +3DOS, but I don't think ... can be used as a buffer).

    Can anyone explain ...
    Zup Zup December 2012 Games
  • Disabling the +3 disk buffer; yes, but how?I would like to disable the +3 disk buffer in order to retrieve those 4K from the machine's RAMdisk. By reading the computer manual and some posts on…

    ... to disable the +3 disk buffer in order to retrieve those ... yet understand how to call +3DOS routines from BASIC. I guess ...
    Alessandro Grussu Alessandro Grussu February 2013 Sinclair Basic
  • +3DOS questionIn the documentation for the +3DOS functions 'DOS GET 1346' and 'DOS SET 1346' it's stated that the copy buffer can't be bigger than 4 sectors (i.e. …

    In the documentation for the +3DOS functions 'DOS GET 1346' and ' ... 's stated that the copy buffer can't be bigger than ... settings i impose on the buffer/ramdisk configuration

    *More ...
    The_Bert The_Bert February 2014 Sinclair Miscellaneous
  • Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…

    ... decided to use a Double Buffer (DB) or 'Back Screen' to ... ;Set dreg value for field location
    mloop:
    ld a ...
    LuMan LuMan April 2014 Development
  • how can we load +3dos files in assembly?is there some way to load +3dos files in assembly, like calling bios routines somewhere? (like defining in registers the filename string address in m…

    is there some way to load +3dos files in assembly, like calling bios routines somewhere? (like defining in registers the filename string address in memory, loading location, size, etc., and call the routine that loads it?)
    nitrofurano nitrofurano April 2020 Development
  • Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …

    ... I was reading through the +3DOS ROM disassembly. Could the carry ... />
    ; ix = char * (current write location)
    ; a = first digit
    unsigned int score;
    char buffer[100];

    utoa(score ...
    Alcoholics Anonymous Alcoholics Anonymous September 2013 Development
  • IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…

    ... .

    Note that +3DOS format disks (which are the ... reserved)
    DE = Address of buffer (first entry initialised)
    HL ... [/url] )
    [CODE]Calling +3DOS from BASIC

    When ... (which describes the
    +3DOS routines), DOS can only be ...
    The_Bert The_Bert October 2013 Sinclair Basic
  • 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…

    ... ,3 use an alt mem location for 17byte run code, default ...
    -b3 @ space in Print Buffer (23296-23552). Program will scan ... easy to rename them in 3DOS.

    The above work ...
    TomD TomD May 2019 Development
  • 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…

    ... variables, the Stack & 3DOS. After a bit of ... is used extensively for 3DOS anyway. This will unfortunately ... zeros
    in printer buffer, if no space exists program ... @16384-32751 user specified memory location
    -fN: force machine ...
    TomD TomD May 2019 Development
  • MakeTZX DMA Buffer Overrun ?Okay folks, Does anyone know why I get DMA Buffer Overruns when using MakeTZX. Could it be anything to do with my SB Enironment string or anything …

    ... know why I get DMA Buffer Overruns when using MakeTZX. Could ... it possible to change the buffer at all ?

    Just ...
    Andrew Barker Andrew Barker January 2003 Sinclair Miscellaneous
  • Buffer AdventureQuite a few months ago, probably this year but well before the 60-day history kept on eBay, I was outbid on a copy of Buffer Adventure by someone who…

    ... outbid on a copy of Buffer Adventure by someone whose user ...
    Battle Bunny Battle Bunny September 2005 MIA/STP/SDP
  • Return of Speccy screen buffer formatI recently discovered that the Spectrum screen buffer format that allows only two colours in an 8x8 pixel block has made its return in a slightly dif…

    ... discovered that the Spectrum screen buffer format that allows only two ...
    vilcans vilcans November 2005 Sinclair Miscellaneous
  • Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …

    ... a specific pixel) to the location of the attribute for the ... was gave me the a location that wasn't in the ...
    Scrapheap Scrapheap April 2006 Development
  • Ways to use double buffering in basicI was meddling with woody's print stream code where you can print characters at any pixel location on screen. I was playing with 12 sprites, very ann…

    ... print characters at any pixel location on screen. I was playing ... draw anyting on 128k screen buffer, and flip it after your ...
    Arda Arda November 2006 Sinclair Basic
  • Location, Location, Location.Guys, Quick question. Im starting to plan my game (as stated in a previous post). You are trapped in a house with zoombies attacking left right and…

    ... imagine each room being a location being driven by 1 of ... will grade it so each location will take time to play ...
    Toxitalk Toxitalk November 2006 Development
  • Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …

    ... can't guarantee the physical location of a "screen" address in ... foremost screen, and a back buffer, which flip when I tell ...
    DonkeyPong DonkeyPong January 2007 Development
  • Spectaculator and favorites location helpI am using Spectaculator and i have a fair few favorites bookmarked with the menu in the emulator. I have recently moved all my games from my C: dri…

    ... all pointing to my C: location but i cant change it ...
    HonoredShadow HonoredShadow March 2007 Emulators
  • +3dos BASIC Headers - Char and Number ArraysHi. I'm almost ready to release the first beta of "3eExplorer" my utility for extracting files from a +3e HDD/CF image. It's actually going quite w…

    ... I can tell in the +3DOS file header the "+3 BASIC ...
    icabod icabod July 2007 Development
  • alternate BASIC ROMI've come up with a few patches to the standard ROM to make it use the 128 shadow screen by default. The ROM is reorganised as follows: RAMTOP is se…

    ... by default
    the print buffer is moved to 0xdb00
    location.
    chev chev October 2008 Sinclair Basic
  • 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…

    ... HEAD0 ; Our sector information buffer
    LD B, ... /> DISK DI ; Main +3DOS access subroutine - Disable interrupts before ... DISK1 ; Call the +3DOS subroutine
    PUSH BC ...
    NaMcO NaMcO December 2008 Development
  • Writing to the screen from a bufferI?m designing a game and am spending a bit of time trying different ideas before I commit my self. I?m currently thinking of writing data to a buffer…

    ... of writing data to a buffer and then writing this ?back ... buffer? to the screen. Can the ... screen be drawn from the buffer without flicker ? If not, what ...
    Mr Millside Mr Millside June 2009 Development
  • Utility to read/write to memory cards formatted for +3EThis post comes from [url=http://www.worldofspectrum.org/forums/showthread.php?t=25658]this thread[/url]. I've released a small command-line utility…

    ... writting new files to the +3DOS partition, the user can choose ... details on a given partition (+3DOS partitions)
    - Can list a ... and save to a specified location in your PC.
    - Can ... /> - Files can have a optional +3DOS header added upon writting to ...
    mcleod_ideafix mcleod_ideafix July 2009 Emulators
<1234567…34>

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Related Threads

  • Location, Location, Location.Guys,<br /> <br /> Quick question.<br /> <br /> Im starting to plan my game (as stated in a previous post). You are trapped in a house with zoombies …
  • MakeTZX DMA Buffer Overrun ?Okay folks,<br /> <br /> Does anyone know why I get DMA Buffer Overruns when using MakeTZX. Could it be anything to do with my SB Enironment string …
  • double buffer or not ? (dizzy games)What method did they used, to animate <br /> the objects in game ?<br /> I am still puzzled about this thing<br /> <br /> Catalin
  • Buffer AdventureQuite a few months ago, probably this year but well before the 60-day history kept on eBay, I was outbid on a copy of Buffer Adventure by someone who…
  • Return of Speccy screen buffer formatI recently discovered that the Spectrum screen buffer format that allows only two colours in an 8x8 pixel block has made its return in a slightly dif…
  • Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …
  • Spectaculator and favorites location helpI am using Spectaculator and i have a fair few favorites bookmarked with the menu in the emulator.<br /> <br /> I have recently moved all my games fr…
  • +3dos BASIC Headers - Char and Number ArraysHi.<br /> <br /> I'm almost ready to release the first beta of "3eExplorer" my utility for extracting files from a +3e HDD/CF image. It's actually g…
  • Location of a website animationA couple of years ago, I found a video on t'interweb but have been trying to find it again recently to no success.<br /> <br /> The video is presente…
  • The ZX printer buffer in +3 modeI have a few programs on .DSK images that were transferred from Timex disks, but some of them have code starting at 23296. Most of the time the code …

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