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Search Again :: Adv Search 1000 results in 0.014s
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  • Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…

    ... use the test suite, only z80/coretest. Looking at that code ... just added the following to z80/tests/README in CVS:

    specifies whether the Z80 is halted.
    specifies the ... followed by lines specifying the initial memory setup. Each has the ...
    Philip Kendall Philip Kendall July 2004 Development
  • 2 questions regarding partial port decoding1) What happens if the Spectrum reads from a port whose number matches the criteria for more than one device ? Does only one of the devices get to r…

    ... bit takes on an illegal value (between 0 and 1) and ... ULA is decoupled from the Z80 with resistors. Peripherals hanging off ... back are connected on the Z80 side of the resistors, so ...
    Alcoholics Anonymous Alcoholics Anonymous August 2004 Development
  • RGB values for Spectrum colorsDoes anybody know the true rgb color values for the spectrums 15 colors. I'll assume that black is 0,0,0 White is probably 255,255,255 But what are t…

    ... decrease or increase every RGB value by the same amount. So ... .net/the.sentinel/The.Spectrum.z80.zip"]http://webpages.charter.net ... /the.sentinel/The.Spectrum.z80.zip[/url]

    :)
    Sadako Sadako August 2004 Development
  • I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …

    ... =random(0..255)*(max.value+1), rescaled value is then in H ... looks simply but multiplying on Z80 consumes so much time)
    Fikee Fikee September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... TStates on a 48k. That value is different for other models ... . Once I have written a Z80 core (i.e. a loop ... on what you get. Each value from 0..255 will get ...
    Dunny Dunny September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... whole thing as one word value (0-65535).

    So ... .

    Again, see the z80 CPU page I listed above ...
    Dunny Dunny September 2004 Development
  • General SoundAny reccomendations for games that support GS?

    ... of it... which after the initial novelty of music ingame isn ... `s got a 12 Mhz Z80 and half a meg of ...
    CKay CKay September 2004 Games
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... .peargames.co.uk/downloads/bb4.z80"]http://www.peargames.co.uk ... /downloads/bb4.z80[/url]

    [code]; make ... from 8
    RLA ; double value (include mask)
    LD E ...
    robpearmain robpearmain September 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... .peargames.co.uk/downloads/bb5.z80"]http://www.peargames.co.uk ... /downloads/bb5.z80[/url]

    Basically, the ... from 8
    RLA ; double value (include mask)
    LD E ...
    robpearmain robpearmain September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... regarding binary notation in the Z80. I have read so much ... me completely is does the z80 use signed binary? For instance ... . How do I know which value it represents? I have read ... few chapters of 'Programming the Z80' by Rodnay Zaks and it ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... regarding binary notation in the Z80. I have read so much ... me completely is does the z80 use signed binary? For instance ... . How do I know which value it represents? I have read ... few chapters of 'Programming the Z80' by Rodnay Zaks and it ...
    Dr BEEP Dr BEEP September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... small error above. The Z80 doesn't use signed ... Also, when adding a value to a register, what happens ... if we exceed the maximum value? For instace, if ... with a value of 65530 - would the value of the ... [/quote]

    The value in the register will be ...
    AndyC AndyC September 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... .peargames.co.uk/downloads/bb9.z80"]http://www.peargames.co.uk ... /downloads/bb9.z80[/url].

    Time to ... from 8
    RLA ; double value (include mask)
    LD E ...
    robpearmain robpearmain September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... on it in 'programming the z80') and I still do not ... then add 1 to the value). This I get. What I ... this always true? If the Z80 uses two's complement then ... my head around how the z80 deals with binary numbers (not ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... then add 1 to the value). This I get. What ... always true? If the Z80 uses two's complement then ... my head around how the z80 deals with binary numbers ... :(. [/quote]

    The Z80 doesn't care - only humans ... bits mean. All the Z80 is doing is applying rules ...
    cyborg cyborg September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... />
    (i.e. add the value in register C to register ... bits - not sure what the value of regA would be - I ... it determines what the value is to the z80.

    The ... early as to whether a value is positive or negative. I ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... makes no difference - the Z80 doesn't know the difference ... it determines what the value is to the z80. [/quote]
    ... early as to whether a value is positive or negative. ... above and get a value greater than 255 then ... if you have a value less than 0 then you ...
    cyborg cyborg September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... worth mentioning. While the Z80 itself does not attach any ... choosing one representation for the Z80 registers and sticking to it ... never attempted to write a Z80 core) would be to ... with instructions where the register value would really be more convenient ...
    gasman gasman September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... it determines what the value is to the z80.
    [/quote]
    Z80 has both a carry and ... unsigned arithmetic. Either way, the Z80 doesn't care.
    AndyC AndyC September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... free to print out any value it feels like for instance1 ... or more structures, where the initial members of each structure have ...
    Philip Kendall Philip Kendall September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... realised that if a value is greater than 255, ... subract 256 from its value I will get an ... pattern. Similarly, if a value is less than 0, ... ://www.geocities.com/cyborg_jim/Z80.html"]http://www.geocities ... .com/cyborg_jim/Z80.html[/url]

    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... in files specify the initial state of the Z80, 64Kb of RAM ... (yes, this is a Z80 test suite, not a Spectrum ... specify what actions the Z80 should take during that ... the final state of the Z80 and the RAM.
    ... a trivial wrapper round your Z80 core, load it with ...
    Philip Kendall Philip Kendall September 2004 Development
  • TZXs speed loadingIs it possible to write a program that will play back tzx files at double speed, the way that TAPER can play back z80 files at 3000 baud? The Z802TZX…

    ... . You can't make a Z80 of the entire tape, because ... TZX files of both the initial load and the loads of ... up no end. With Z80, only the initial load can be affected ... you load in another section - Z80 is useless for this, you ...
    Spector Spector September 2004 Sinclair Miscellaneous
  • TZXs speed loadingIs it possible to write a program that will play back tzx files at double speed, the way that TAPER can play back z80 files at 3000 baud? The Z802TZX…

    ... that TAPER can play back z80 files at 3000 baud?
    value, we've got a zero ...
    Dunny Dunny September 2004 Sinclair Miscellaneous
  • Zecut0r and ZAFA while ago (about 2 yrs)i took VbSpec and tried to port it to Delphi 6. Althought it was pretty weak, it. Meanwhile DelphiSpec 0.1 appeared and i wa…

    ... for the Zaf-forth to Z80 complier


    ;"set paper colour using value in var j"
    ... br /> ;"save loop counter value used to set the colours ... rot it moves the top value into the third"
    ... here we would print the value of the attr"
    ...
    Steve(spt) Steve(spt) October 2004 Emulators
  • New tzxvault team accounts setupAfter the long drawn out discussion re. the "official WOS DVD's" etc and ways to fund purchases of tapes/disks for dumping, I've created accounts for…

    ... in some cases) from my initial personal wants list.
    Great ... ) so my perception of their value could be completely off.
    Andrew Barker Andrew Barker October 2004 MIA/STP/SDP
  • New tzxvault team accounts setupAfter the long drawn out discussion re. the "official WOS DVD's" etc and ways to fund purchases of tapes/disks for dumping, I've created accounts for…

    ... in some cases) from my initial personal wants list.
    Great ... ) so my perception of their value could be completely off.
    darkman darkman October 2004 MIA/STP/SDP
  • New tzxvault team accounts setupAfter the long drawn out discussion re. the "official WOS DVD's" etc and ways to fund purchases of tapes/disks for dumping, I've created accounts for…

    ... in some cases) from my initial personal wants list.
    Great ... ) so my perception of their value could be completely off.
    Andrew Barker Andrew Barker October 2004 MIA/STP/SDP
  • Java EmulatorsOk, Im not having a good time of it here. Im trying to get a java emu on my site so people can play the games online. Ive tried Jasper Java Emu, and…

    You need something like



    see the source for my Jasper demo

    [url="http://www.wearmouth.demon.co.uk/jav/pangolin.htm"]http://www.wearmouth.demon.co.uk/jav/pangolin.htm[/url]

    One with windows and a window ...
    Geoff Geoff December 2004 Emulators
  • Java EmulatorsOk, Im not having a good time of it here. Im trying to get a java emu on my site so people can play the games online. Ive tried Jasper Java Emu, and…

    [quote]
    On 2004-12-04 22:02, Geoff wrote:
    You need something like



    see the source for my Jasper demo

    [url="http://www.wearmouth.demon.co.uk/jav/pangolin.htm"]http://www.wearmouth.demon.co.uk/jav/pangolin. ...
    mel the bell mel the bell December 2004 Emulators
<1…14151617181920…34>

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