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Search Again :: Adv Search 1000 results in 0.089s
<1…78910111213…34>
  • +3 assembler questionI was wondering if anyone could give any suggestions as to how to get this bit of code working on the +2A/+3 in 128k mode. It works on the +128k/+2 i…

    ... how to get this bit of code working on the +2A ...
    LD HL,(23641) ;E_LINE - address of editor buffer
    CALL $1652 ...
    Battle Bunny Battle Bunny August 2010 Sinclair Basic
  • Machine code issue...Hi Folks, My trials with MCODE continue and I am stuck. I wrote the following program in BASIC to simply POKE an attribute byte in to a "box" on th…

    ... /> 2100FA LD HL,64000 ;HL=Address of Y
    CB26 SLA (HL ... INC HL ;Add 1 to Address
    0D DEC C ;Next ... HL,DE ;Subtract Width from Address
    05 DEC B ; ...
    Paddy Coleman Paddy Coleman September 2010 Sinclair Basic
  • Loading BASIC programs stored as "bytes:"Hi all, I have a question regarding loading BASIC programs, that I managed to save as machine code (I suppose) when I was a child, as a result of e…

    ... a child, as a result of experimentation with CODE, LINE etc ... need to know the exact address of memory where ZX Spectrum 48k ...
    ZXMrk ZXMrk October 2010 Development
  • Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…

    ... y/8 )+ ( x/8 ) + start address of level data.

    But ... ; load it into low byte of HL

    add ... br /> add hl, de ; ADD address of level data!

    ld ...
    sekrets sekrets December 2010 Development
  • Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…

    ... , increase twice for next screen address
    inc (hl)
    ... /> sprite ld hl,(point) ;address of current line of sprite
    ld a ... ,(hl) ;we load screen address ... /> seed defw screen ;screen address table pointer, table below
    R-Tape R-Tape January 2011 Development
  • Kiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…

    ...
    ;> HL IS STARTING ADDRESS OF TEXT
    ;*********************************
    ASCII
    ;DE CONTAINS ACTUAL ADDRESS OF DATA

    FILE_SAVE
    LD DE, 33000 ;STARTING ADDRESS OF PROGRAM

    SAVE_LOOP
    Robin Robin August 2011 Announcements
  • Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…

    ... : REM will return the address of the keys array
    ... ; or BC holds the address of the keyports/patterns array if ... /> ld hl,key_up_port ; address of the ports/patterns
    ... /> ; On entry, HL = address of message
    print_message: push hl ...
    polomint polomint September 2011 Development
  • Address of monitor to load emulator files into real SpeccyI have a monitor/debugger that can load data over serial port really fast. Now I would like to extend it to load standard emulator files over the ser…

    I have a monitor/debugger that can load data over serial port really fast. Now I would like to extend it to load standard emulator files over the serial port to a real Speccy. The problem is that most emulator files are plain memory dumps, 48Kb, with ...
    tstih tstih September 2011 Development
  • Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…

    ... next_tile_line nop ; 2 bytes for address of next tle line
    nop ... sp,35468 ; Point SP to address table

    ... pop de ; POP next destination address 10
    pop hl ; ... POP source address. 10

    ...
    Zoltar Zoltar September 2011 Development
  • What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…

    ...
    ld hl,blocks ; address of user-defined graphics data.
    ; Jump back to beginning of main loop.

    ... prior to display and deletion of gunbase.

    of player.
    ld a ...
    Saboteur Saboteur May 2012 Development
  • ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…

    ... is in the 4th cycle of a opcode fetch cycle and ... lower bit of the address of second screen byte the value of R register ... that the row address of the second byte pair of the four byte ... but the previous latched row address of the refresh remains.

    Oibaf Oibaf August 2012 Emulators
  • PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…

    ... have been using this type of thing:

    ld a ... /> call 5366
    ld de, (address of text to print)
    ld ... bc, (length of text to print)
    call ...
    daveysludge daveysludge August 2012 Development
  • merging bytesPicturing three bytes with their bits identified by letters to make the visualisation easier, what's the best way to perform this transformation? [co…

    ... /> So bits 'abc' of Byte 1 and 'lmnop' of Byte 2 are ... calling PIXEL_ADD to get the address of Byte 1 in HL and ...
    Battle Bunny Battle Bunny August 2012 Development
  • Any ideas on speeding up this assembler segment?It copies a pixel column of a rectangle which may be anywhere in the display file to a pixel column in d$. The source column may start at any bit pos…

    It copies a pixel column of a rectangle which may be ... $()
    inc h ; 4 calculate address of next pixrow down
    ld ...
    Battle Bunny Battle Bunny September 2012 Development
  • Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …

    ... - 0-255
    ellipse = address of routine
    [/code]
    ... br /> pop ix ;IX=address of parameter string
    ld ... c ;don't plot if address too low
    cp ... ;don't plot if address too high
    SETPIXL ...
    Battle Bunny Battle Bunny November 2012 Development
  • Who have I upset?I was browsing these very WoS forums at about 8am this morning, as I am wont to do, on my little Android tabletty thing. Suddenly, mid-forum-browse,…

    ... assumed it was some sort of temporary anomaly, but no, it ... works fine from another IP address on the same subnet, and ... fine from the "rogue" IP address -- it's nowt at my ... . It appears that the IP address of that device has been blocked ...
    ccowley ccowley November 2012 Chit chat
  • Timex undocumented video modesHi people. Please check my assumption about the functioning of the Timex in undocumented video modes: D2D1D0 wr #FF 0 0 0 - ZX color mode, the base …

    ... about the functioning of the Timex in ... ZX color mode, the base address of the screen #4000
    address of the screen #6000
    address of the screen #4000
    address of the screen #6000
    Black_Cat Black_Cat April 2013 Hardware
  • Contacting Facebook?This is part query, part rant. How does one go about contacting the walled garden that is Facebook without having an account? Their website - like m…

    ... disclosing an email address or any other way of getting in touch ... 've got a second email address of mine infected via this brain ... main address got screwed by them and after 6 months of constant ...
    richl richl June 2013 Chit chat
  • How to write self-relocating code using Pasmo?With z80asm, I can write code like this: [CODE] org 0 ; a total lie, but makes the reloc sums work .dest: equ …

    ... 60000 ; some high address

    ;; entry address (probably 23760) is ...
    ld de,.dest ; target address of relocated code
    ld bc ... JP and the start of the rest of the code with nearly ...
    stephenw32768 stephenw32768 August 2013 Development
  • BIFROST* example: "Knights & Demons DX" source codeA package containing the source files of our multicolor game "Knights & Demons DX" is now available for download [URL="http://www.mediafire.com/?hbch…

    ... B]fontchr[/B] - address of a new 8x8 custom font ... address of animated multicolor tiles
    [B]menuscr[/B] - address of ... ]mainscr[/B] - address of the compressed background gameplay ... ' set BIFROST* tileset address
    POKE 59035,254 ...
    Einar Saukas Einar Saukas August 2013 Development
  • JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …

    ... are three official releases of JSW2. I'm not ... select from a variety of cheats, such as Infinite ... it. A small piece of basic containing assembly to ... one has seven pages instead of one.

    ... 'basic' at a higher address, and then examined the loader ...
    spider spider September 2013 Sinclair Miscellaneous
  • BEEPER competitionHello, seems like ZX people are invited to send songs to ATARI party. :) ____________________________ Dear musicians, We would like to invite you…

    ... .

    I suppose the address of sending in this case would ...
    Mister Beep Mister Beep September 2013 Announcements
  • LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…

    ... br /> ;; Inputs:
    ;; HL: address of compressed data
    ;; DE: destination ... address
    ;;
    ;; Leaves ... ;; reads the length of a sequence of literals or bytes
    stephenw32768 stephenw32768 October 2013 Development
  • This is Tritone (new beeper music compilation)A Battle of the Bits music compilation! All made by nix./site, brightentayle and, most importantly, TK90X Fan! \ ^_^ / All the songs in here use a b…

    A Battle of the Bits music compilation! All ... Tritone, which provides three channels of (variable) tone, a semi-volume control ...
    Crash Nicker Crash Nicker December 2013 Brand new software
  • Help me with this Stack overflow Freak Show.I am asking a simple question on Stack overflow and once again, the closed minded morons a pointing and tutting. I'm asking a question about C point…

    ... (i,e, *). Instead of using the & address of operator to, which would ... simply wanted a notional model of why the language was made ...
    Scottie_uk Scottie_uk January 2014 Chit chat
  • Scrolling Bi-Colour Engine for 4-Player GamesJust putting this code up for people to have a look at. Far from finished. Should simply compile and run a bit of a demo. Only good for 128K and +…

    ... hl = address of start of row
    add hl,de ;hl = address of attr on ... ld d,(hl) ;de = address of start of row
    ld c,a ... /> ex de,hl ;de = address of char on screen
    pop ... hl ;retrieve data address
    jp print_char_hl_de ;draw ...
    joefish joefish March 2014 Development
  • 4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…

    ... about maybe making use of some of the unused/undocumented ... br /> pointing HL at the address of n in memory. If you ... to test if the address read from is the ... to transfer into the address of n, point HL at ... and low bytes of the 'address' of the set of ports you ...
    Basher Basher March 2014 Hardware
  • Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …

    ... to find that aspect of our address we take the ... in the low byte of the screen address.

    ... /> X (xcoord) = 2
    Screen Address = 20482


    ... /> ld e,a ; de = address of screen.
    ret
    < ...
    Jagd Tiger Jagd Tiger April 2014 Development
  • misunderstanding screen addressingHi I am just reading mastering machine code Toni Baker: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/books/MasteringMachineCodeOnYourZXSpectrum…

    ... . This gives us the address of the “print position”
    for any point of the screen, and also ... first two digits of the address of this print position are ... This gives us the address 40A4.
    Try ... 4. This gives us the address 40A4.[/QUOTE]

    username username April 2014 Sinclair Miscellaneous
  • Repton ManiaHi all, I am the creator, and look after, the Repton Resource Page ([url]www.reptonresourcepage.co.uk[/url]). For the site, I have written a freely …

    ... 0x8C40 "Repton" display at top of opening screen
    0x08240 ... data
    0x169FF end of data (rest of file is junk)
    address):
    15 14 13 12 ... 010xxxxxxxxxxxxx is the base address of 0x4000 (start of screen memory)
    ...
    geraldholdsworth geraldholdsworth June 2014 Games
<1…78910111213…34>

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