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<1…10111213141516…34>
  • Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …

    ... for reading of a hex address, and maybe a DPOKE of ... flags nicely for the final variable allocation.

    Thanks for ...
    RST#08 RST#08 July 2009 Development
  • z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…

    ... 65368. I guess that memory address would be interchangable with the ... , perhaps by changing some system variable?

    I seem to ...
    Rickard Rickard September 2009 Sinclair Basic
  • z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…

    ... 65368. I guess that memory address would be interchangable with the ... , perhaps by changing some system variable?
    [/quote]

    ... (23606/7). It contains the address of the character set, minus ... your character set at that address. The format is the ...
    Dunny Dunny September 2009 Sinclair Basic
  • z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…

    ... that USR "A" returns the address of the UDG variable?
    Rickard Rickard September 2009 Sinclair Basic
  • z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…

    ... USR "A" returns the address of the UDG variable?[/QUOTE]

    address is the same as for ...
    Dunny Dunny September 2009 Sinclair Basic
  • Jumping to BASIC after importing 23296,1703Sorry for the confusing title. :-D Now that I've learned how to stop a game from starting after loading (in Fuse and Specemu), I have a few more que…

    ... the stack and ERR_SP system variable before jumping to the BASIC ... hl
    ld hl, 4867 ; address of MAIN-4 in ROM ... return here
    jp 7030 ; address of STMT-RET in ROM ...
    Marko Marko September 2009 Sinclair Miscellaneous
  • POKING graphicsI remember using binary code (in BASIC) to POKE graphics (thanks Input magazine!) Using a FOR..NEXT loop you would POKE each square in the 8X8 charac…

    ... POKE the system variable that holds the base address of the UDGs ... trick with the 'CHARS' system variable, which allows you to customise ...
    gasman gasman November 2009 Games
  • When would you use LD A,R ?Can anyone tell me a practical use of LD A,R and LD R,A I am confused when you would need to use it? Cheers

    ... , time, randomness and MAC address to generate unique ID's ... thing by using the MAC address combined with the time ... ; 16 bits derived from MAC address + noise
    LD A, ... there operations that take a variable length of time for the ...
    csmith csmith November 2009 Development
  • Req' Help with Random numbersHello all, im new to the forum, i hope im putting this in the right place ... I would like to ask a question in the hope someone will be able to as…

    ... to make them into an array - that way, it's possible ... five times using a different variable each time:

    [code ...
    gasman gasman November 2009 Sinclair Basic
  • RAM PagingCan anyone shed some light as to how RAM paging actually works, at a hardware level (so not POKE xxxxx stuff). I know about CE and OE lines on DRAMs …

    ... to do with the address lines as these can ... only control 64KB of address space, so what other ... or other type of logic array.
    - some combinatorial ... gates) to combine the address requested by the CPU ... logic found in the logic array, or some standalone logic ...
    Winston Winston December 2009 Hardware
  • Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…

    ... f000 - f1ff SP1.LIB tile array
    52 ; d200 - efff ... SP1.LIB update array for full size screen 32x24 ... memory requirements (the update array mentioned in the memory ... /> wpoke(0xd1d2, my_isr); // address is our suibroutine my_isr()
    Alcoholics Anonymous Alcoholics Anonymous December 2009 Development
  • Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…

    ... to which is stored in variable 's' above) and 9 ... ram into the top 16k (address $c000 - $ffff). If ... are assuming is located below address $c000. We can make ... is compiling beginning at address 32768 and the isr ... (because it's below address $c000) but the z80 ...
    Alcoholics Anonymous Alcoholics Anonymous December 2009 Development
  • Dim commandI try o find a BASIC COMPILER for ZX SPECTRUM 128 that use DIM command with two or more letter as 10 DIM AB(10) instead of 10 DIM A(10) Any iforma…

    ... . If you don't specify variable types, it will do what ... the compiler what type the variable is means it can generate ... the VARinfo to the right address.
    Then a new ZX ...
    Alcoholics Anonymous Alcoholics Anonymous December 2009 Sinclair Basic
  • How do I know where my C compiler is putting my variable?Let me show you my code. I am writing a Z80 emulator (z80.c) which sets up a bit of shared memory for communication with another process. Well, I got…

    ... byte, assigned to be the address of your shared memory block ... ]z80.c[/i], change the variable from [b]byte bl_ctrl;[/b ...
    obo obo December 2009 Chit chat
  • How do I know where my C compiler is putting my variable?Let me show you my code. I am writing a Z80 emulator (z80.c) which sets up a bit of shared memory for communication with another process. Well, I got…

    ... byte, assigned to be the address of your shared memory block ... ]z80.c[/i], change the variable from [b]byte bl_ctrl;[/b ... ]

    Right, so the variable will be pointing to the ...
    wilsonsamm wilsonsamm December 2009 Chit chat
  • How do I know where my C compiler is putting my variable?Let me show you my code. I am writing a Z80 emulator (z80.c) which sets up a bit of shared memory for communication with another process. Well, I got…

    ... will point to the next address in memory, and you can ... set the value at the address pbl_value is pointing at as ... location, and array indexing/pointer arithmetic will change the address being pointed ...
    JamesW JamesW December 2009 Chit chat
  • How do I know where my C compiler is putting my variable?Let me show you my code. I am writing a Z80 emulator (z80.c) which sets up a bit of shared memory for communication with another process. Well, I got…

    ... the same memory space. A variable value changed by one thread ... pointer is an address in the local address space that has been ... memory may use a different address (pointer value) to refer to ... the same block. The local address is what shmat returns. This ...
    Alcoholics Anonymous Alcoholics Anonymous December 2009 Chit chat
  • Anybody got a hack for PAW'd games?Has anybody got a hack to browse the text in PAW'd games?

    ... , is etc.) The token table address is held in the same ... LET x=41560: REM PUT ADDRESS TO SEARCH FROM HERE
    variable length table. Maybe you can ... />
    ld hl,40000 ;put address to search from here
    Bandit Bandit January 2010 Sinclair Miscellaneous
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... .zip to your home email address. If they are to your ... )
    Tiles= 6176 bytes
    Array/MAR= 1274 bytes
    TOTAL ... )
    Tiles= 7392 bytes
    Array/MAR= 1817 bytes
    TOTAL ...
    kgmcneil kgmcneil February 2010 Development
  • Why did Ultimate games load like this?What I remember about the early Ultimate games was the unusual way they loaded. You'd get the BASIC bootstrap loader, then a SCREEN$, then a main bl…

    ... />
    23728 is the NMIADD variable. It is often said that ... the 48K ROM made this variable useless. Maybe Ultimate assumed this ... byte LOADed in at this address contains a JP (HL) instruction ... . This address is called all throughout the ...
    Jimmy Jimmy February 2010 Games
  • Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…

    ... cell addresses to a redraw array (populated from the dirtybuffer, ... touch in the ISR). Redraw array is 128 words long. ... push hl
    ; get destination address
    ld a, (hl)
    .copywholescreen
    ld hl, #a000 ; address of backbuffer
    ld de ...
    Paradigm Shifter Paradigm Shifter February 2010 Games
  • A.I. in a Pacman game made in BasicA few years ago I tried to make my own Pacman game in Sinclair Basic. The map, UDGs and the whole game was completed and was working with just one gh…

    ... messing around with the systerm variable that tells the speccy where ... (can't remember name or address of the sys var). Moving ... the address down a byte shifts all ...
    Paradigm Shifter Paradigm Shifter February 2010 Sinclair Basic
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ...
    ; de = memory address of encoded message
    ; ... : hl = addr of encoder array (array indexed by symbols pointing at ... /> ; de = memory address to write encoded symbol to ... ; exit : hl = memory address to write next encoded symbol ...
    Alcoholics Anonymous Alcoholics Anonymous February 2010 Development
  • Problem with Spin 0.7s +3 file I/OI'm currently trying the +3 disk functions in z88dk. I've based my work upon the simple snippet Winston posted a while ago, but doing the contrary. H…

    ... is the correct address to the system variable used to keep track ...
    na_th_an na_th_an March 2010 Emulators
  • Problem with Spin 0.7s +3 file I/OI'm currently trying the +3 disk functions in z88dk. I've based my work upon the simple snippet Winston posted a while ago, but doing the contrary. H…

    ... is the correct address to the system variable used to keep track ... to port $1ffd. The system variable at $5b67 needs to be ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Emulators
  • JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …

    ... to it having 24 bit address space and using a 32bit ... of the classes a paused variable was being used across threads ...
    brownb2 brownb2 March 2010 Emulators
  • tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …

    ... br /> .noinc ; hl = address of message function

    ret ; jump to function address
    [/code]
    < ... to sort an array of any data ... +6 current sprite frame address added to graphic pointers< ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • My first platformerHi all! How do you do? Been lurking here for a while, but never had the courage to join the forum. :) The Speccy was my first computer, so I've alw…

    ... BEEP routines read the system variable BORDCR.

    Also if ... *b) into the BORDCR system variable
    *(unsigned char *)23624=b
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • My first platformerHi all! How do you do? Been lurking here for a while, but never had the courage to join the forum. :) The Speccy was my first computer, so I've alw…

    ... .

    srcframe = address of the unshifted sprite graphic ...

    destframe = address of where to write the ... and add that absolute address to the struct_sp1_ss.e_offset ... necessary. The array preshifted[] holds the absolute address of the sprite ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
<1…10111213141516…34>

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