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  • Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…

    ... the encoding might be using variable multiples of 16 as offsets ... for each character code in array p() to avoid having to ... is why most of the array DIMs are at the word ...
    Battle Bunny Battle Bunny May 2016 Games
  • Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…

    ... current colour a global variable instead and perhaps ... char *address;

    address = zx_pxy2saddr(x,y);
    *address |= zx_px2bitmask ... zx_saddr2aaddr() stands for "screen address to attribute address".

    zx_px2bitmask ...
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…

    ... current colour in a global variable

    static void ...
    POP HL ; HL = return address
    POP DE ; E = y ...
    call zx_saddr2aaddr ; hl = attribute address

    ld a,(_current_attr ...
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... /> };


    // Attach C Variable to data declared in external ...
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... .


    [quote]No address tables or anything like that ... a list implemented with an array.
    But I haven't ...
    RMartins RMartins June 2016 Development
  • TommyGun's getting a Debuggerhttp://youtu.be/B_kZVRvYV98 I have always wanted to debug the programs I write in TommyGun using TommyGun instead of the debuggers in emulators. …

    ... You can easily output a variable 1 (8 bit) or ... 2 bytes (16 bit) variable.
    You can also easily ... is {lives} and is at address [address]. eg. poke [lives], {lives ... print out a 1 byte variable
    6 bytes ... print out a 2 byte variable
    19 bytes to ...
    Kiwi Kiwi July 2016 Development
  • Datasheets of the Spectrum 128K +2 ICs.Is there any place where I can find the datasheets of the ICs of the Spectrum 128K +2? I have tried to look for each of them separately but for some…

    ... NOT cover the Amstrad gate array chip used in the +2A ... page results in an URL address that starts ftp://ftp.worldofspectrum ...
    1024MAK 1024MAK July 2016 Hardware
  • I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…

    ... not simply a 2-byte address -- it needs to be a ... 2-byte address plus a list of sections ... affecting a particular offset is variable length and unknowable before linking ...
    Alcoholics Anonymous Alcoholics Anonymous July 2016 Development
  • Empire - port of trs80 basic programBack when I was a little kid, I had the opportunity to play around with a trs80 model 1 with level 2 basic. One of the games I often played was call…

    The TRS-80 BASIC array handling seems a bit confusing ... " DIM V (I) Declares an array variable V containing I number of ... +1' elements. So, does every array dimension have I+1 elements ...
    Battle Bunny Battle Bunny July 2016 Brand new software
  • Empire - port of trs80 basic programBack when I was a little kid, I had the opportunity to play around with a trs80 model 1 with level 2 basic. One of the games I often played was call…

    ... ;870427"]The TRS-80 BASIC array handling seems a bit confusing ... ]
    Makes Z a string variable, O an integer and leaves ... ,19) is a single-precision array with 7 × 20 = 140 elements ... (6,6) is a string array with 7 x 7 = 49 ...
    GReW GReW July 2016 Brand new software
  • Meaning of Format Byte of a TRDOS DiskDoes anybody knows the Meaning of the Format Byte (Byte 227 in Sector 8 (Sector Count from 0) in Track Zero) of a TR-DOS Disk (Real Disk of a Bet…

    ... check. Sets the drive type variable.

    #405 CALL #3FD ...
    Hikaru Hikaru August 2016 Hardware
  • Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…

    ... my case case the gate array timing was imperfect in relation ... A14 and A15 address lines (one per each address). The owner was ...
    secarica secarica August 2016 Hardware
  • Some Graphic Coding & Audio help.Hello my fellow WoS'ers I am in the process of writing some code for graphical purposes - I have Z88DK raring to go but I do not know how to take…

    ... (see the zx screen address functions that manipulate screen addresses ... ).

    This free address block can be reserved inside ... reserve memory in a character array like "unsigned char buffer[ ... []; // buffer points at the array in bank 6 - you are ...
    Alcoholics Anonymous Alcoholics Anonymous August 2016 Software
  • Speeding up programs by hacking the SysVarsPositively pleased to properly discover this area of the forum! I have a couple of recent tricks that might be of interest - they're probably old hat…

    ... multiple copies of the same variable name?[/quote]

    The ... FN and saves the start address in zlo+zhi. (The FN ...
    Battle Bunny Battle Bunny September 2016 Sinclair Basic
  • Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…

    ... length of each instruction becomes variable)
    5) JP (IX) f ... is no reading from IX address or from IX you know ...
    tstih tstih September 2016 Development
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... does is set the system variable RAMTOP to 39999, which means ... program to expand up to address 39999. You can now POKE ...
    joefish joefish September 2016 Sinclair Basic
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... can get a memory address of a variable through a pointer, but ... . It might be a "virtual" address too, i.e. not the ... actual "real" ("physical") address but I'm not sure ...
    textvoyage textvoyage September 2016 Sinclair Basic
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... can't use just any variable in machine code. There are ... from the screen (16384) to address 58368 in memory. And it ...
    joefish joefish September 2016 Sinclair Basic
  • POKE taking a variable amount of time...Hi Folks, Does anyone know why the following POKE statements seem to vary in their execution time? [code]100 POKE 60000,10 110 POKE 60001,16…

    ... machine code:
    [code]
    Address MCode Notes
    -------------------------------------
    $EA60 ... /> [/quote]

    The system variable DEFADD points to the parameters ... the index registers at the address in DEFADD and access the ...
    GReW GReW September 2016 Sinclair Basic
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... be either a simple variable or an array , in which case the ...
    harriusherbartio harriusherbartio September 2016 Hardware
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... can surely be applied to variable position printing.

    [code ...
    jamorski jamorski October 2016 Development
  • Time Gate graphics patchI've rediscovered Time Gate and one thing I don't like about the game is that it's hard to remember what's what in the status indicators. The manual …

    ... Time Gate header loads into address 23559 which is in system ... the way into the STRMS variable). I wonder if one of ...
    textvoyage textvoyage October 2016 Games
  • RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…

    ... the machine code routine at address nn.
    - Returns the contents ... 're executing machine code at address 65368. If you didn't ... put nothing at that address, it will crash. Put a ... it on the SEED system variable. It may have some effects ...
    Zup Zup October 2016 Sinclair Basic
  • Arrays in BASICHi so I'm making this crappy game and I wanna store the screen positions of some UDGs in in a 50x2 array cause I have 50 characters. So I made the ar…

    ... be used to address positions on row 23. System variable DF_SZ (23659 ... />
    Some other commands can address the lower screen directly, eg ... : STOP
    [/code]
    System variable BORDCR (23624) controls the lower ...
    Battle Bunny Battle Bunny October 2016 Sinclair Basic
  • Arrays in BASICHi so I'm making this crappy game and I wanna store the screen positions of some UDGs in in a 50x2 array cause I have 50 characters. So I made the ar…

    A string array a$() can be minimised ... (six bytes for a 1D array header plus one data byte ... To get rid of an array altogether, you first of all ... ):
    REM store start address of arrays in SEED
    address
    1012 INPUT "Press ...
    Battle Bunny Battle Bunny October 2016 Sinclair Basic
  • Arrays in BASICHi so I'm making this crappy game and I wanna store the screen positions of some UDGs in in a 50x2 array cause I have 50 characters. So I made the ar…

    ... be used to address positions on row 23. System variable DF_SZ (23659 ... />
    Some other commands can address the lower screen directly, eg ... : STOP
    [/code]
    System variable BORDCR (23624) controls the lower ...
    ivanb303 ivanb303 October 2016 Sinclair Basic
  • Recommend games that don't need the ROM ?I'm looking for a few games that: * Are freely available as .sna files * Do not need the ROM at all * Have motion on screen after snapshot resta…

    ... , does it redirect the CHARS variable as well?
    [/quote]
    variable, but calculates the character address itself. The POKE ...
    GReW GReW October 2016 Games
  • Recommend games that don't need the ROM ?I'm looking for a few games that: * Are freely available as .sna files * Do not need the ROM at all * Have motion on screen after snapshot resta…

    ... , does it redirect the CHARS variable as well?
    [/quote]
    variable, but calculates the character address itself. The POKE ...
    rich_chandler rich_chandler October 2016 Games
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... memory block...returns bytes at address[/b]
    Command byte ... memory block...set bytes at address[/b]
    Command byte ... monitor giving starting address of loaded program as address. The monitor ... variable (i.e. a watch) the PC would calculate symbol address ...
    tstih tstih November 2016 Development
<1…24252627282930…34>

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