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<1234567…34>
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    ... ---------------------------------------

    The location of the charset being used is ... If you are running out of memory remember that every number ... end of the message is signified by the last character in ... ensure that it was the last line, as once a ...
    na_th_an na_th_an April 2005 Development
  • Multiface 3 trouble saving to diskHey all, I have just got a Multiface 3 with the intention of using it to transfer some of my tapes onto +3 disk. I am totally new to this so pleas…

    ... ? I remember Marauder being one of those games that uses the ... vector into the last byte of RAM and assumes that the first byte of ROM is ... snapshot do you see any of the files there?
    kphair kphair March 2012 Sinclair Miscellaneous
  • How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…

    ... listed on pages 127-130 of the Vickers book; the UDG ... /3 and points to the last byte of RAM which passed the startup memory ... they're at the top of RAM and more than 21 are ...
    Battle Bunny Battle Bunny February 2014 Development
  • How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…

    ... listed on pages 127-130 of the Vickers book; the UDG ... /3 and points to the last byte of RAM which passed the startup memory ... they're at the top of RAM and more than 21 are ...
    Speccy_James Speccy_James February 2014 Development
  • Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …

    ... be a problem with this byte of RAM, I used POKE to set ... On the left is the last byte of lower RAM (32767) being (successfully) tested ... on the right the first byte of upper RAM (32768 ) was tested. ... terminating on the first byte of upper RAM or a few bytes ...
    Zorn Zorn April 2012 Hardware
  • Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …

    ... ld a, 0x3b ; high byte of vector table
    ld ... 16 - (attr * 16)
    ; last byte of the back_buffer - 16
    ld ... - (attr * 16)
    ; last byte of the screen
    ld hl ... set return location (no stack available)
    ld (endcall), ...
    chev chev April 2012 Development
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... which writes compressed data to RAM.

    A few details ... in the data.
    - The last byte of the data block is always ... limitations:
    - About 1K is available for the compressor and decompressor ...
    utz utz May 2013 Development
  • 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 …

    ... http://img543.imageshack.us/i/ram.png/][IMG]http://img543. ... imageshack.us/img543/1706/ram.png[/IMG][/URL]
    ... at address 089F0h. The very last BYTE of the program is probably 089E5h ... also see a possible terminator BYTE with the value 080h ...
    ASM ASM November 2010 Development
  • The last batch of 50 DivIDE interfaces!Yes, I said that before, but now I'm sure. I started on my last batch of 50 DivIDE interfaces, here's the eBay-offer: [url]http://cgi.ebay.co.uk/ws/…

    Yes, I said that before, but now I'm sure.

    I started on my last batch of 50 DivIDE interfaces, here's the eBay-offer:
    [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=180750290526[/url]

    Hurry and get one!
    bverstee bverstee November 2011 Hardware
  • The last batch of 50 DivIDE interfaces!Yes, I said that before, but now I'm sure. I started on my last batch of 50 DivIDE interfaces, here's the eBay-offer: [url]http://cgi.ebay.co.uk/ws/…

    ... /> I started on my last batch of 50 DivIDE interfaces, here's ...
    bverstee bverstee November 2011 Sales
  • Sign-in problems for last couple of daysI've been having problems signing into the forum on my computer for the last couple of days. Might be because I have a slightly different setup (usi…

    ... on my computer for the last couple of days. Might be because ...
    Grunaki Grunaki May 2016 WoS/Forum Issues
  • ZX Spectrum+ showing 16K of RAMHello again, as the title says my ZX Spectrum+ is showing only 16K of RAM instead of 48K when running a memory check. [url="http://www.1000bit.it/su…

    ... + is showing only 16K of RAM instead of 48K when running a memory ... is the motherboard of a Spectrum+, and not of an original 16K ... how to identify the faulty RAM chip, but I seriously have ...
    vale vale July 2017 Hardware
  • Random-Access to Microdrive FileI am working on a BASIC program to backup a microdrive text-file to standard tape array-file. To backup a text-file from one microdrive to a secon…

    ... ]any[/i] of the 512 bytes-length sectors available within my text ... and forcing the re-PRINT# of the last byte of the sector.

    of the 512 byte buffer

    There ... not found" error, so the last SAVE should be done manually ...
    mattsteel mattsteel May 2018 Sinclair Basic
  • Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…

    ... Spectrum 48K with one extra byte of RAM! Setting PC to $0000 ... 's a side effect of the cut-down assembler ... (but usually contiguous) blocks of memory for its target area ... an instruction crosses the boundaries of a block. That's ... does not fit into available memory :)
    Marko Marko June 2008 Emulators
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... it. Only the 48K version of ColorPRINT which incorporates the IM2 ... 's in the original version of ColorPRINT in the WoS archive ... original version by saving the last 4K of RAM to "ColorFONT.bin".
    byte of the UDG.
    chev chev May 2009 Development
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... was determined by the amount of logic available in the ULA. More ... side to address the proper byte when reading a horizontal ... that waste even a single byte of RAM cannot be better than the ... a single byte memory holes.
    - The maximum available pixels per ...
    mcleod_ideafix mcleod_ideafix February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... determined by the amount of logic available in the ULA...[/QUOTE ... that waste even a single byte of RAM cannot be better than ... [QUOTE=mcleod_ideafix;511425]- The maximum available pixels per scan that can ... .[/QUOTE]
    ...and one of the slowest ways to draw ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... was determined by the amount of logic available in the ULA. More ... side to address the proper byte when reading a horizontal ... that waste even a single byte of RAM cannot be better than the ... a single byte memory holes.
    - The maximum available pixels per ...
    Paddy Coleman Paddy Coleman February 2011 Sinclair Basic
  • Ninja (improved BUGFIX)This is an improved BUGFIX for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0003433"]Ninja[/URL], please replace the "known errors" de…

    ... wrong time. Because of this, the location of an idol is ... $e4ba, which corresponds to the last byte of this table. If there are ... likely to happen at the last room), the current room number ... /> The final version of the BUGFIX file is now available [URL="http ...
    Einar Saukas Einar Saukas June 2011 Infoseek database
  • changing extended RAM pages in SpinIs it possible to edit the data in 128k extended RAM pages in Spin? I've tried both the debugger tool and the pokes tool and, although they let me ma…

    ... ; start assembling at the first byte of RAM page 4...
    ; outputs code ... ; start assembling at the first byte of RAM page 6...
    ; outputs code ... page, and the amount of ROM pages available depends on the hardware ...
    Marko Marko July 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... ? Is it the first byte of RAM, i.e. location at ... really important? Some other byte informs about Spectrum issue ... inconsistencies in byte order. First of two bytes of BC register ... of games which surely don't use undocumented instructions and are available ...
    PeterP PeterP August 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... Is it the first byte of RAM, i.e. location at ... /> [QUOTE]
    Some other byte informs about Spectrum issue (whether ... inconsistencies in byte order. First of two bytes of BC register ... of games which surely don't use undocumented instructions and are available ...
    ccowley ccowley August 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... so that the last byte in RAM can be poked ... backwards a known number of bytes. People can ... written assuming portions of the sw will ... of assumptions when they understand the consequences. I suppose saving one byte ... to documented features of an interface and ...
    Alcoholics Anonymous Alcoholics Anonymous September 2011 Emulators
  • Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…

    ... ld a, 0x3b ; high byte of vector table
    ld ... 16 - (attr * 16)
    ; last byte of the back_buffer - 16
    ld ... - (attr * 16)
    ; last byte of the screen
    ld hl ... set return location (no stack available)
    ld (endcall), ...
    p13z p13z January 2012 Sinclair Miscellaneous
  • Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …

    ... on the first byte of RAM. Usefully, this is the last byte that gets the ... with one of the others. I didn't suspect this RAM anyway ... POKE and PEEK in upper RAM suggested more than one faulty ... upper RAM and fitted sockets.

    Testing revealed 4 of the ...
    Zorn Zorn April 2012 Hardware
  • Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …

    ... ld a, 0x3b ; high byte of vector table
    ld ... 16 - (attr * 16)
    ; last byte of the back_buffer - 16
    ld ... - (attr * 16)
    ; last byte of the screen
    ld hl ... set return location (no stack available)
    ld (endcall), ...
    R-Tape R-Tape April 2012 Development
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... port (0x1f). The RAM was initialised to 0x00 ... address 0x0064. The last byte of this three-byte instruction is 0x5b, ... image loaded into RAM and a RAM pre-load image ... will hold an image of RAM, if that is what ... you get a dump of the RAM followed by the ROM ...
    zub zub February 2013 Hardware
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... compressed and uncompressed versions into RAM at the same time?[/ ... for forward decompression, the last byte of the packed file must be ... least 2 bytes above the last byte of the unpacked file. For ... 2 below the lowest address byte of the uncompressed file.
    ...
    GoingDigital GoingDigital September 2013 Development
<1234567…34>

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