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  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... was due to only partial decoding of the Kempston port (it ...
    chev chev August 2010 Hardware
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... with each issue.
    Partial decoding of Kempton port causes incompatibility ...
    kpuchatek kpuchatek August 2010 Hardware
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... with each issue.
    Partial decoding of Kempton port causes incompatibility ... it up to use full decoding. There is no ULA in ...
    chev chev August 2010 Hardware
  • Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…

    ... are slower due to the decoding process to be performed both ...
    mcleod_ideafix mcleod_ideafix August 2010 Sinclair Basic
  • DivIDEI just missed the Ebay listing of some DivIde`s that were available ! :( I`ve contacted the seller if there are any more but have had no replies - so…

    ... lack of the joystick interfaces decoding port 31 fully.
    rwap rwap August 2010 Wanted
  • DivIDEI just missed the Ebay listing of some DivIde`s that were available ! :( I`ve contacted the seller if there are any more but have had no replies - so…

    ... lack of the joystick interfaces decoding port 31 fully.[/QUOTE]
    Alien 8 Alien 8 August 2010 Wanted
  • Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…

    ... slow bit (3 conditions), the decoding done on Speccy (one condition ...
    kgmcneil kgmcneil August 2010 Sinclair Basic
  • Using Interface II joystick in kempston-only gamesHi everyone! It's me again, bothering you with new crazy ideas :) I have recently acquired an Amstrad +2A Speccy with a joystick and built-in Interf…

    ... for games that use lazy decoding
    * in most cases you ...
    chev chev August 2010 Hardware
  • Using Interface II joystick in kempston-only gamesHi everyone! It's me again, bothering you with new crazy ideas :) I have recently acquired an Amstrad +2A Speccy with a joystick and built-in Interf…

    ... for games that use lazy decoding
    * in most cases you ...
    velesoft velesoft August 2010 Hardware
  • 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…

    ... Pentagon 128K has very simple decoding, so xxFD works as 7FFD ...
    Shiru Shiru August 2010 Hardware
  • Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…

    ... just realised there are no OPCODEs to multiply/divide on the ...
    Paddy Coleman Paddy Coleman August 2010 Sinclair Basic
  • Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…

    ... just realised there are no OPCODEs to multiply/divide on the ...
    Winston Winston August 2010 Sinclair Basic
  • SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…

    ... down by the partial port decoding? In fact, how do ports ...
    Arjun Arjun August 2010 Sinclair Miscellaneous
  • SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…

    ... down by the partial port decoding? In fact, how do ports ...
    Dunny Dunny August 2010 Sinclair Miscellaneous
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... expect that would have involved decoding address lines looking for certain ...
    guesser guesser August 2010 Hardware
  • BeliefsNot sure if this is an acceptable poll or not but just thought I'd poll the beliefs of the average geek. I won't try to taint the poll for now with …

    ... a Dragon 32, chant Z80 opcodes and recite passages from the ... over how to chant undocumented opcodes led to a bit of ...
    jonathan jonathan August 2010 Chit chat
  • BeliefsNot sure if this is an acceptable poll or not but just thought I'd poll the beliefs of the average geek. I won't try to taint the poll for now with …

    ... over how to chant undocumented opcodes led to a bit of ...
    takapa takapa August 2010 Chit chat
  • it's only an electrical item.. but stillafter MANY years (maybe 18?) , my tv just popped.. when I say many years, I've had this tv since the days of Snes.. just prior I remember playing mad…

    ... say you can see encoding/decoding issues with corrupt groups of ...
    ZnorXman ZnorXman September 2010 Chit chat
  • it's only an electrical item.. but stillafter MANY years (maybe 18?) , my tv just popped.. when I say many years, I've had this tv since the days of Snes.. just prior I remember playing mad…

    ... say you can see encoding/decoding issues with corrupt groups of ...
    dm_boozefreek dm_boozefreek September 2010 Chit chat
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ... like:
    [QUOTE]The Memory decoding for the high memory isnt ...
    spodula spodula September 2010 Hardware
  • Automatic opcode to machine codeHi everyone, Would people use a program that you enter opcodes and it automatically converts them to machine code and saves them to a file. So if yo…

    ... assembler mnemonics anyway, not opcodes. The opcodes are the binary code the ...
    guesser guesser September 2010 Development
  • Automatic opcode to machine codeHi everyone, Would people use a program that you enter opcodes and it automatically converts them to machine code and saves them to a file. So if yo…

    Well there were a couple of monitors for the Speccy, but generally speaking they're a lot less useful than Assemblers (especially given that Z80 opcodes aren't a consistent length)
    AndyC AndyC September 2010 Development
  • Automatic opcode to machine codeHi everyone, Would people use a program that you enter opcodes and it automatically converts them to machine code and saves them to a file. So if yo…

    ... assembler mnemonics anyway, not opcodes. The opcodes are the binary code the ...
    Paddy Coleman Paddy Coleman September 2010 Development
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... 6502 did all its instruction decoding using nothing other than combinatorial ...
    Winston Winston September 2010 Chit chat
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... 6502 did all its instruction decoding using nothing other than combinatorial ...
    Matt_B Matt_B September 2010 Chit chat
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... 6502 did all its instruction decoding using nothing other than combinatorial ...
    BloodBaz BloodBaz September 2010 Chit chat
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... any websites guides for what opcodes do in a z80
    opcodes). I have always used it ...
    ASM ASM October 2010 Sinclair Miscellaneous
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... any websites guides for what opcodes do in a z80
    mcleod_ideafix mcleod_ideafix October 2010 Sinclair Miscellaneous
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... sixty four instructions.
    All opcodes are 64 BIT in size ...
    ASM ASM October 2010 Development
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