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  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... a screen dump of 6912 BYTES. As the Spectrum only had ...
    ASM ASM November 2010 Development
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... we'll need about 100 bytes for register data and executer ...
    Arda Arda November 2010 Sinclair Miscellaneous
  • 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…

    ... left intact with only 17 BYTES of Z80 code left on ...
    ASM ASM November 2010 Announcements
  • Stopping the loading messages...Hi Folks, As you know, the ZX BASIC kindly reports the program, bytes or data that you have loaded on the screen. To stop these appearing I was thi…

    ... BASIC kindly reports the program, bytes or data that you have ...
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…

    ... />
    [code]
    ; Read 32k bytes from port 191 as fast ... /> LD HL,32767 ; Number of bytes to read
    LD DE ...
    trellis trellis December 2010 Development
  • Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…

    ... a "level" defined by 504 bytes (28 squares across x 18 ...
    sekrets sekrets December 2010 Development
  • For those that are interested: SpecBAS 0.0.601 available nowWith added bug fixes! This build allows you to PEEK and POKE strings to memory banks (for very fast movement of bytes in memory) and to send variable…

    ... (for very fast movement of bytes in memory) and to send ...
    Dunny Dunny December 2010 Sinclair Miscellaneous
  • Assembler intricaciesHi all, I've been looking at the internals of a game to see how it all works and I've found some things that I don't understand and can't find any i…

    ... managed to use nearly 100 bytes of code and three sub ...
    garethadams garethadams January 2011 Development
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... there will be only 4 bytes of memory left for programs ...
    tstih tstih January 2011 Development
  • Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…

    ... /> inc ix ;move ix 2 bytes along for next table address ...
    R-Tape R-Tape January 2011 Development
  • Strange DivIDE ScreenI've just got an SD card adaptor for my DivIDE and it does something strange. On startup, I can see the DivIDE logo and it registers the adaptor, bu…

    ... works OK, apart from the bytes in the screen memory. I ...
    joefish joefish January 2011 Hardware
  • SpecBAS: Request for comment - SpritesHi all - Having been slaving away at the new SpecBAS release, I've decided to finally bite the bullet and implement a sprite engine. I've got a nice…

    ... ) are stored in strings of bytes which represent their pixels, with ...
    Dunny Dunny January 2011 Sinclair Miscellaneous
  • Saving space...Hi Folks, Looking for ways to save some memory in a program I am writing. In a number of places I have the following code: [CODE]xxxx PAUSE 1: …

    ... this takes up [B]14 bytes [/B]in memory i.e ... = 1 byte
    1 = 5 bytes
    RANDOMIZE = 1 byte
    64564 = 5 bytes[/FONT]

    So if ... ]then that would take 6 bytes (I realise there would be ...
    Paddy Coleman Paddy Coleman February 2011 Sinclair Basic
  • Octode - new eight channel beeper music engineYes, another one. This engine provides eight channels of tone, without volume or decays, and with small pauses between rows, so it is Wham-like. It a…

    ... that ZX-7 uses #2600 bytes as buffer while playing, which ...
    Shiru Shiru February 2011 Development
  • Kansas City Standard tape data --> File?Someone here will know this. Does there exist a utility to read Kansas City Standard audio tape data from an audio file (e.g. WAV or similar) and d…

    Someone here will know this.

    Does there exist a utility to read Kansas City Standard audio tape data from an audio file (e.g. WAV or similar) and dump the raw bytes to a file?

    Thanks!
    trellis trellis February 2011 Chit chat
  • 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…

    ... 25001 and are about 110 bytes long.

    Is there ...
    mcleod_ideafix mcleod_ideafix March 2011 Development
  • Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …

    ... to two cycles of 16 bytes passed over each time, but ... /> I suppose going to 16 bytes a throw might work pretty ... , thus using a screen 28 bytes across. I'm wondering if ...
    Gedlion Gedlion March 2011 Development
  • I know some Commodore owners are a bit daft but.....[url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160570606819&ssPageName=ADME:B:SS:US:1123[/url] This man has been believing all these years…

    ... ... he's only got 3583 bytes of memory :(
    chaosmongers chaosmongers April 2011 Chit chat
  • Huby - new two channel beeper music engineAnother new beeper music engine. This one is very simple, similar to Music Box or Music Studio - just two channels of tone and one drum sound which r…

    ... is small size, just 100 bytes of code, and compact data ...
    Shiru Shiru April 2011 Development
  • Retro-X : RXA format?Hi! I've used Retro-X to convert a short AVI video into a RXA format anim file, using QL lowres mode (mode 8, 256x256). Peeking at the resulting file…

    ... to load the first 32768 bytes (past the 100 byte header ... , took away the first 6912 bytes past the 100 byte header ...
    mcleod_ideafix mcleod_ideafix April 2011 Development
  • SpecBAS 0.646 now available.Yay! Here's another round of bugfixes and additions to the Program. Not so much of the extract coding features, but more back-to-basics this time: […

    ... reading/writing floating point values (bytes in size) from and to ...
    Dunny Dunny May 2011 Sinclair Miscellaneous
  • Support of other SCREEN$ formats in ZX-PaintbrushDear readers, I've already implemented a nearly complete ULAPlus support in my developing version of ZX-Paintbrush. Works fine so far. But I asked m…

    ... attributes, standard palette)
    6912 bytes
    [*]ULAPlus screen$ ( ... with 64 extra palette bytes)
    6912+64 bytes
    [*]screen ... attributes, making 6144+6144 bytes (I already tested this ... support, making 6144+6144+64 bytes
    [/LIST]

    clausjahn clausjahn May 2011 Emulators
  • Full Screen Editor/AssemblerIMHO program [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0008187"]Full Screen Editor/Assembler[/URL] should have a "known errors" note as …

    ... ]:

    The last two bytes of the [B]BIT b ...
    Einar Saukas Einar Saukas May 2011 Infoseek database
  • Sevenup problemLet's suppose I'm importing into Sevenup a picture which is 24 pixel wide (that is 3 chars) and 20 pixels high (not complete 3 chars) When I'm expo…

    ... ] operations - it will add some bytes so it will make 24 ... 't really need these extra bytes and I'm manually deleting ...
    Ralf Ralf May 2011 Development
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... , and then it interprets the bytes there as instructions.
    But ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • fast font engine possible?inspired by the recent "proportional font" thread for zx basic and ideas for gui and having done some of the work on this in the past i wonder if it …

    ... /> byte8 ascent;
    byte8 bytes_per_line; /* bytes per one raster line */
    (each 8 bytes are one character…)

    byte 5: 2 … 2 bytes per line gives max. width ...
    tstih tstih May 2011 Development
  • Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…

    ... Each line consumes 4 bytes, the first pair is ... end-marker are four zero bytes.

    [B ... array variable consumes 6 bytes. As all possible names ... are pre-defined 480 bytes are automatically in-use ... 78 variables x 6 = 468 bytes + 12 byte header preamble). ...
    Jimmy Jimmy May 2011 Development
  • JSpeccy 0.88.4 releasedA new JSpeccy has been released. The main changes are: [LIST] [*]Resolves a problem in AY emulation code what affects the sound of Retrowork's game …

    ... standard format (6912 bytes) or ULAplus format (6976 bytes)
    [/LIST]
    zx81 zx81 June 2011 Emulators
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