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<1…20212223242526…34>
  • Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…

    ... :
    [LIST]
    [*]Ability to set breakpoints from the command line ... . "spin -bp:pc=$8000" to set a breakpoint when pc = 32768 ... a breakpoint on the IR routine, but what if interrupts are ...
    icabod icabod March 2007 Emulators
  • Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…

    ... :
    [LIST]
    [*]Ability to set breakpoints from the command line ... . "spin -bp:pc=$8000" to set a breakpoint when pc = 32768 ... a breakpoint on the IR routine, but what if interrupts are ... /> Fuse has the ability to set a breakpoint at a specific ...
    Philip Kendall Philip Kendall March 2007 Emulators
  • TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…

    ... only lower 16K only working. Ramtop gets set at 32768 etc, no ...
    DEATH DEATH March 2007 Hardware
  • Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…

    ... way is to set up your own im2 interrupt routine that replaces ... song. So, yes, the ROM routine is totally useless but the ... 't using an im2 interrupt routine, but is instead relying on ...
    Alcoholics Anonymous Alcoholics Anonymous March 2007 Development
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... /> Basically, I need a Z80 routine that checks as much of ... grateful.

    I've set the org low in screen ... /> for a = 17384 to 65535 : set up loop1
    let V ...
    DEATH DEATH March 2007 Development
  • TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…

    ... only lower 16K only working. Ramtop gets set at 32768 etc, no ...
    Marcelo Marcelo March 2007 Hardware
  • SpecDB spectrum database programHi all, Many many moons since I wrote my last message on this forum, I even forgot my password and lost my registered mail account so I had to create…

    ... .
    - I've written a routine to import WOS database from ... collecting info from a huge set of tzx files is very ...
    Juanma Juanma March 2007 Development
  • It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …

    ... if the values that were set are still all correct).
    set OK, colour attributes, screen memory ... ROM back in so the routine can checksum it.
    Winston Winston April 2007 Hardware
  • ZX81 - 64mb queryI know this is a spectrum forum but hopefully someone out there may know the answer to my question. I buy and sell old sinclairs and have sold numer…

    I think I would have to say so, yes. Can you try some games on it to see if they work? Or, if you have the manual, see where RAMTOP is set (assuming the '81 has such a system variable)?
    DEATH DEATH April 2007 Hardware
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... br />
    Fair 'nuff. Your routine is slower though :-) Jumps, relative ...
    scf
    ccf ;set & complement carry = clear carry ... rather than two instructions that set then complement the flag.
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... ]Here's my screen clearing routine, can't remember where I ... of the printer buffer is set to 15.
    Geoff Geoff April 2007 Development
  • "Lost" 48K expansionToday I dug up my Speccy after more than 10yrs of inactivity. I bought it as a 16K in 1983, than I had expanded to 48K and never had problem. Until t…

    ... (or similar) chips. A ROM routine tries to determine how much ... not functional by performing a set of memory writes and reads ...
    Winston Winston April 2007 Hardware
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... in the extended z80 instruction set). When rotating the accumulator, it ... , I´m creating a little routine to get Video Adres from ...
    HexDump HexDump April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... It requires more general routine to set attribute value to required bias ... the memory and point the routine to it. You need to ... fast. Note that you can set attribute "bias" immediately without former ... to required level, just set origin to level you need ...
    omega omega April 2007 Development
  • Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…

    ... keys in a key control routine. So I used two more ... a user-defined control method set up from a menu.
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... simply put):

    Set 16384 to hex FF (binary ... 11111111)
    Set 16385 to 00
    Set 16386 to FF ... can be detected by the routine in the start of ... flips adjacent bits when you set memory. So it gets ... - all mem set to 0, then 1s set on even addresses ...
    Winston Winston April 2007 Development
  • New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…

    ... sort of thing could be set up on the Spectrum? EDIT ... (which means emulating the load routine's instruction-by-instruction cycles ...
    ghbearman ghbearman May 2007 Development
  • Converting m$ to dataI created a maze using a matrix of 704 characters. In order to save memory, and since the maze it's just walls and spaces which could be interpreted …

    ... to do it using a routine that printed the maze using ... it.

    -Create a routine to read data from the ... statement to bring down the RAMTOP e.g.

    [code ...
    BloodBaz BloodBaz May 2007 Sinclair Basic
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... a call to the ROM routine that scrolls the screen. It ... or not. If it's set to 1000, the loop terminates ...
    Matt_B Matt_B May 2007 Development
  • Reading the Kempston & AMX mouse...Does anybody know which ports & values are used to read the AMX and/or the Kempston mouse? I'm playing with developing a shoot-em-up at the moment, …

    ... which allows sensitivity to be set by the user.

    routine prevents coordinates from wrapping across ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…

    ... bytes by setting a new RAMTOP with the CLEAR command and ... hl,16384
    ld de,ramtop addr
    ld bc,6912 ... source address. As they are set up now the copy goes ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Sinclair Basic
  • Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…

    ... bytes by setting a new RAMTOP with the CLEAR command and ... hl,16384
    ld de,ramtop addr
    ld bc,6912 ... source address. As they are set up now the copy goes ...
    DEATH DEATH May 2007 Sinclair Basic
  • Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…

    ... bytes by setting a new RAMTOP with the CLEAR command and ... hl,16384
    ld de,ramtop addr
    ld bc,6912 ... source address. As they are set up now the copy goes ...
    Toxitalk Toxitalk May 2007 Sinclair Basic
  • Converting m$ to dataI created a maze using a matrix of 704 characters. In order to save memory, and since the maze it's just walls and spaces which could be interpreted …

    ... ) again, using the machine code routine. It changes the colours of ... RANDOMIZE USR 60037
    To set the "wall" colour, POKE 65075 ... , colour
    To set the "path" colour, POKE 65076 ... and RESTORE from. It is set to memory location 60000 by ...
    BloodBaz BloodBaz May 2007 Sinclair Basic
  • Faster Pussycat, yer man (UDG)Right we are almost into a game area. Ive started to play with UDG and by using bins and pokes I can redesign graphics to my hearts content. Now Im…

    ... characters in the ZX81 character set.
    So you can POKE ... set when you do a PRINT, at which point the PRINT routine ...
    hldswrth hldswrth May 2007 Sinclair Basic
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... : HL >= overhead

    ; set the overhead to the quickest ... ), and jump to the correct routine.
    overhead2: EQU 16 + 21 ...
    icabod icabod May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... : HL >= overhead

    ; set the overhead to the quickest ... /> ; and jump to the correct routine from the table.

    icabod icabod May 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... performing the sprite clear/redraw routine and change it again AFTER ... while to run. If you set up Interrupt Mode 2 to ... vertical retrace, get the interrupt routine in and out ASAP and ... than a generic CALL scr_down_line routine etc. Move sprites can be ...
    BloodBaz BloodBaz May 2007 Development
  • Game OptimisationBelow is a section of code Im using for movement enermy display and collision detect. What happens is that you move the sight with ,.qa and space do…

    ... main loop the array is set with random x and y ... positions and set to active (some x positions ... 4 held an array) the routine slows to a crawl.
    Toxitalk Toxitalk June 2007 Sinclair Basic
  • Idiots guide needed for idiotI thought I would try and give a basic compiler a go. The trouble is that I have tried both hisoft and mcoderIII and it just doesnt seem to be worki…

    ... and put themselves up above RAMTOP when they are loaded so ... />
    Shameless plug for the set of compilers and machine code ...
    hldswrth hldswrth June 2007 Sinclair Basic
<1…20212223242526…34>

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HitBox

Word Docs Hits
set 29.1K 39.2K
ramtop 445 687
routine 9.5K 14.8K

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