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<1…17181920212223…34>
  • Beginner InfoI have trying to find some hardware information for use with assembly coding but havn't had much luck. For instance. How do I redirect the vertical …

    ... 23:19, Where's that AY chip gone... wrote:
    [quote ... diagram that will show which bits to test to read the ...
    rich_chandler rich_chandler February 2006 Development
  • Woody?s Tape2wav tested[quote] I've uploaded a new version of Tape2WAV to the same URL as given above. Any chance of giving this version a quick test? [/quote] Hi Woody, …

    ... seems a waste of CD bits. I smashed 18 games in ... now has a jumper to select left or right audio channel ...
    Marcelo Marcelo February 2006 Development
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... will be interpreted thus:
    Bits 0-2 RAM page (0 ... at 0C000h
    Bit 3 Select normal (0) or shadow (1 ... 5.
    Bit 4 ROM select. ROM 0 is the 128k ... /> AND 0F8h
    OR 4 ;Select bank 4
    LD BC ...
    Fikee Fikee February 2006 Development
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... mapped on 49152 depends on bits 0-2
    so you ... one:
    [code]
    set bits 0-2 to value 7 ... 16384 and 49152) and you select the visible one by switching ...
    Fikee Fikee February 2006 Development
  • Manic MIner for WindowsJust seen this on CSS [url="http://www.xmixdrix.com/manicminer/"]Manic Miner for Windows[/url] downloaded it and played it. Pretty good even if Willy…

    ... wrote:
    you have to register to download it??????????
    fuck ... protection (or borrow one of AY's spare ones)... :D
    robert@fm robert@fm March 2006 Games
  • Manic MIner for WindowsJust seen this on CSS [url="http://www.xmixdrix.com/manicminer/"]Manic Miner for Windows[/url] downloaded it and played it. Pretty good even if Willy…

    ... wrote:
    you have to register to download it??????????
    fuck ... protection (or borrow one of AY's spare ones)... :D
    mel the bell mel the bell March 2006 Games
  • Lesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…

    ... ULA?s (uncommitted logic array) register, which is at location 254 ... /O map. The bottom three bits of the byte sent to ... of the screen. The other bits should be set to zero ...
    Blondin235 Blondin235 March 2006 Sinclair Basic
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... the "normal" undocumented bits of the flag register. MEMPTR is a another ...
    Philip Kendall Philip Kendall April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... the "normal" undocumented bits of the flag register. MEMPTR is a another ...
    Dunny Dunny April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... trace entire state of this register after each instruction. LSB is ... of the document which says "bits 3 and 5 of the ... corresponding bits of the MSB of an internal 16-bit register". No ... doubt that this temporary register is used in 16-bit ...
    Luca Luca April 2006 Emulators
  • z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…

    ... created so the user can select options and such.

    ay player.
    Looks to be ...
    Kiwi Kiwi April 2006 Development
  • z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…

    ... created so the user can select options and such.
    [/quote ... :) In the case of the AY I really do think one ... the next state of the AY registers and leaves it to ... the program to update the AY, whether that be in an ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... there is a misterious internal register in Z80 CPU (MEMPTR) which ... bits of which are affecting bits 3 and 5 of the Flags register ... do it. Now this MEMPTR register is totally cracked in result ... if this is the same register which is known as WZ ...
    The President The President April 2006 Emulators
  • ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…

    ... bank select (48-64k)
    Port #12BF BLK2 bits b7 ... bank select (32-48k)
    Port #11BF BLK1 bits b7 ... bank select (16-32k)
    Port #10BF BLK0 bits R0 ... b1 b0 - Block 0 bank select (0-16k)

    bits available for the bank select, meaning that ...
    MikeW MikeW April 2006 Hardware
  • A Public Service AnnouncementThis thread is here for anyone to plug brand-new websites. I'll read it, so you'll get at least some marketing/exposure out of it... I'll start the …

    [QUOTE=Where's that AY chip gone...]That's why ... Form 10 is completed to register the company and prior to ...
    Walrus Walrus April 2006 Announcements
  • A Public Service AnnouncementThis thread is here for anyone to plug brand-new websites. I'll read it, so you'll get at least some marketing/exposure out of it... I'll start the …

    ... />
    So... who's gonna register the company now, and then ... take legal action against AY-Chip using your registered company ...
    icabod icabod April 2006 Announcements
  • Graphics : CPC -> SpectrumOk my CPC game is nowhere near done (the actual coding for the CPC hasn't even begun yet as I'm still preparing enough graphics and animation and doi…

    ... , the character you didn't select to be at the beginning ... ' slash platformer with explorationy type bits and a lil bit of ...
    Wolverine Wolverine May 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... , bit 6 = 1 for removed, bits 5:0 = number of occluding ... number from 0-8 to select one of the tic-tac ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... a Win32 app for composing AY tunes. It is able to ... read AY tunes from a variety of ... 's output state into an AY data structure rather than directly ... compressed ay music, for example.

    I have here bits of ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... into the "frame_seq" array to select the current pacman animation graphic ... 8 bits used while reading port $fe (the keyboard port) to select ... key row and the lower 5 bits used to ... key row. A couple of bits also indicate whether the CAPS ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... has a monopoly on this register. The alternative to disabling ... :

    [code]
    // select keys for keyboard joystick
    select the next pacman graphic in ... as is 'frame_seq' to select the correct pacman graphic's ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Perfect Dark (N64) - best FPS ever?Since we're talking about Half-Life 2 on this board, I thought I'd mention Perfect Dark, the best first person shooter ever. Don't believe me? Hardly…

    ... , you then (if you choose) select your weapon, and when you ... levels, or the pointless platforming bits, and the boring "lets pile ...
    ewgf ewgf July 2006 Sinclair Miscellaneous
  • Perfect Dark (N64) - best FPS ever?Since we're talking about Half-Life 2 on this board, I thought I'd mention Perfect Dark, the best first person shooter ever. Don't believe me? Hardly…

    ... , you then (if you choose) select your weapon, and when you ... levels, or the pointless platforming bits, and the boring "lets pile ...
    The Starglider The Starglider August 2006 Sinclair Miscellaneous
  • Final Assault from US Gold + EpyxI seem to recall having had this game back when I only had a 48k spectrum, but I'm not 100% positive on this... any of you rememeber or have got anot…

    ... AY music. When loaded in 48K mode it loaded in two bits ...
    na_th_an na_th_an September 2006 Games
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... the Speccy display only you select forground and background color for ... of resolution. It's 2 bits/pixel with additional pallette control ... you have up to 4 bits per pixel and 1 byte ...
    JamesD JamesD September 2006 Sinclair Miscellaneous
  • Self made membraneHi fellowes, as you probably know, the keyboard membrane seems to be the weakest hardware part in Spectrum. It is not so hard to find in eBay or in s…

    ... of register).

    What I said, was to get two bits ... be glued together with perfect register. Not too much else the ...
    DEATH DEATH October 2006 Hardware
  • Scrolling Loader CounterPlease can someone help me with writing a scrolling counter for a loading system. I like the Hewson counter so i`ve taken the font from zynaps loade…

    ... one bit
    when 8 bits are collected, loader put whole ... /> partx ;last part
    ;store register
    ;finish your work
    Fikee Fikee November 2006 Development
  • Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…

    ... , the TS has a plain AY chip, that means three musical ... note as you have a register to activate noise per one ... then you have a controller AY port to specify which channels ... /> To create quality tunes for AY you can use Vortex Tracker ...
    na_th_an na_th_an November 2006 Games
  • tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…

    Try and use the B-register for counters, as you can ... mask off the lowest three bits of the accumulator, and then ...
    bobs bobs November 2006 Development
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
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    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
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    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

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