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Search Again :: Adv Search 1000 results in 0.094s
<1…26272829303132…34>
  • next pixelI searched the "Discussions" groups for the phrase "next pixel" and got no matches - and removing the quotes it discards the "next" and just searches…

    ... is that it calculates the address from scratch every time, whereas ... be able to calculate the address of the next one with less ...
    Battle Bunny Battle Bunny September 2012 Development
  • Tape problemsI have finally got round to resurrecting my 16K Spectrum, but cannot get any success in loading software. I am plugging it into the headphone port o…

    One other possibility is a memory fault, so that the available RAM is less than 16k. The ROM startup routine sets P_RAMT to the address of the last good byte, so on a 16k Spectrum PEEK 23732 + 256*PEEK 23733 should give 32767.
    Battle Bunny Battle Bunny September 2012 Sinclair Miscellaneous
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... -running (over 32768) and memorable address in RAM
    ;initialise score ... into the memory at an address we choose.
    The computer ... 'll store the attribute file address of the 'car' in some free ... listing follows, with my email address at the end for your ...
    buzzy buzzy September 2012 Development
  • Converting UDG to 2x2I've got a udg that I want to display in different sizes. Obviously I just print it for normal size, I can use the udg in bin format to display it ea…

    ... table for the four quarters of the expanded character so that ... to shave off a fraction of a second from the 2x2 ... /> where 'u' is the base address of the UDG being converted, 'd ... , and 'a' is the base address of the 32-byte temporary UDG ...
    Battle Bunny Battle Bunny October 2012 Sinclair Basic
  • UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…

    ... contains the address of the start of each character row of the pixel ... function does is get the address of the graphics in HL. ...
    Next it gets the address of the first table (character rows ... /> add hl,de ;hl = address of character graphic
    push hl ...
    joefish joefish October 2012 Development
  • UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…

    ... use add hl,hl instead of sla l;rl h, so ... /> [CODE]ld hl, chars ;start of character graphics
    ld d ...
    add hl,de ;hl = address of character graphic[/CODE]could be ...
    ub880d ub880d October 2012 Development
  • UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…

    ... add hl,de ;hl = address of character graphic
    push hl ... br /> pop hl ;recover graphic address in hl

    ... />
    char_rows ;character row address table
    defw 16384, 16416 ...
    attr_rows ;attribute row address table
    defw 22528, ...
    joefish joefish October 2012 Development
  • smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…

    ... x2 bytes for each address (or x5 if doing ... 1) is not the address of the attribute for the top ... It's extracting the address from the array which ... just to calculate the address every time, whereby 21909T ... So erasing by calculated address POKE would be good ...
    Battle Bunny Battle Bunny October 2012 Sinclair Basic
  • Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…

    ... , I /think/ off the top of my head, you would use ... unnecessary (if you get rid of the pokes)- you get one ... /> asm
    ld hl,777 ;'Address of Level poked from outside
    asm
    pop hl ; RET address
    pop bc ; B=y ...
    LCD LCD November 2012 Development
  • Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…

    ... /> asm
    ld hl,777 ;'Address of Level poked from outside
    asm
    ld hl,777 ;'Address of Level poked from outside
    Einar Saukas Einar Saukas November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... HL; that will be the address of the output routine it's ... going to use. A copy of the ROM disassembly always comes ...
    Battle Bunny Battle Bunny November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... I got the white bottom-of-screen treatment again. Well ... br /> [CODE]
    ;
    ; Output of Messages
    ;

    .msgprt ... /> ld hl,$0780 ; $3c00 (address of characters in ROM) / 8
    address in ROM
    add hl ...
    snigfarp snigfarp November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... the lo-byte of the channel 'S' output routine address in the ... . This is normally $09F4, the address of PRINT_OUT. The POKE changes it ... to $096F, which is the address of a RET, so the call ... does nothing. The address gets restored by the ROM ...
    Battle Bunny Battle Bunny November 2012 Development
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... in your bitmap (array of bytes), when you're ... This gives the location of every instruction that was ... set bit represents the address of an instruction that was ... a plain text log of instruction addresses is also ... need to log each address once or not at ...
    SkoolKid SkoolKid November 2012 Emulators
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... blocks where the start address of the second block is JRed ... as text if its proportion of printable characters is above a ... algorithm for the next version of SkoolKit. :)

    Right ... algorithm in the development version of SkoolKit gets scores that are ...
    SkoolKid SkoolKid December 2012 Emulators
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... approach could give the best of both?[/QUOTE]
    It ... Skool and Contact Sam Cruise (of which I already have complete ... set bit corresponds to the address of an executed instruction. Bit K ... of byte N corresponds to address 8N+K.)
    SkoolKid SkoolKid December 2012 Emulators
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    OK, I think part of the problem is that SkoolKit ... in which only the address of the first byte of an instruction is ... by [i]snaptrace[/i], every address occupied by an instruction has ...
    SkoolKid SkoolKid December 2012 Emulators
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... ;669176]OK, I think part of the problem is that SkoolKit ... in which only the address of the first byte of an instruction is ... by [i]snaptrace[/i], every address occupied by an instruction has ...
    obo obo December 2012 Emulators
  • Key redefinition addresses for games made with AGDI am attempting to implement a system to make keys redefinable on the AGD-authored game I am working on. I tried to use [URL="http://www.worldofspect…

    ... recent AGD games and both of them seem to have that ... , #C2); it is a part of the code that AGD uses ... it's found at an address n, doing PRINT PEEK (n ... will likely get you the address of the buffer.
    Hope that ...
    Hikaru Hikaru December 2012 Development
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... or full 8 bit adressation of ula port.[/QUOTE]
    TIMEX ... therefore can be of any decoding. None of the exUSSR clone ZX ... clones ZX Spectrum decode the address of the port #FE only to ...
    Black_Cat Black_Cat December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... buffer does not "see" much of a load, hence very little ... pull up on the bus address of the ZX Spectrum cannot be ...
    Black_Cat Black_Cat December 2012 Hardware
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... therefore can be of any decoding. None of the exUSSR clone ZX ... clones ZX Spectrum decode the address of the port #FE only to ... ]

    here is part of this table:
    [code]
    velesoft velesoft December 2012 Hardware
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    Updated exoopt, now accepts a 3rd parameter (hexadecimal address of the 156 bytes table) and outputs a file called "d.asm" with the appropiate decruncher.

    [url]http://retrolandia.net/foro/showthread.php?tid=48&pid=244#pid244[/url]
    antoniovillena antoniovillena January 2013 Development
  • TRUE VIDEO, INV VIDEO!Am I the only one who thinks the two keys "TRUE VIDEO" and "INV VIDEO" on the 128/+2/+3 keyboards are pretty much useless, since embedding control co…

    ... /> ld c,(hl) ; get address of routine to execute
    inc ... hl)
    push bc ; stack address
    ret ; and "return" ... [/code]
    Quite a few of the screens can be completed ...
    Battle Bunny Battle Bunny January 2013 Sinclair Miscellaneous
  • Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…

    ... what happens after that address has been generated?[/QUOTE]< ... it jumps to the address of the first character in ... A15 bit on the address bus, which tells the ... br />
    The address in the program counter now ... that crucial refresh cycle, of course) and passes on ...
    Matt_B Matt_B January 2013 Chit chat
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... "end address of compressed data" higher than "end address of uncompressed data ... buffer address (which would be the beginning of memory address if ... decompressor, and the buffer address. Then it will ... the chosen parameters and address), and also save ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • As seen on WOS (Rev. Hardcastle returns :) )someone posted a micro live clip (memory is bad, pretty sure it was a regular) anyway , they are running ad's for some net clip show with paddy mc g…

    ... should get Nigel's email address of Martjin to tell him.. as ... clip.

    reminds me of when I initially joined here ... and reminded me of well them times.
    fog fog January 2013 Chit chat
  • Newbie Spectrum developer advice ....Hi, Im new to the site and to spectrum developing - well, not quite, I wrote Spectrum programmes in Basic 30 years ago but then went off into the wo…

    ... and have lots of comments and meaninful variable names. However ... the memory savings by shortening variable names, removing comments etc ... then is a good way of documenting the code - ...

    And, of course, length of variable names, comments etc, doesn ...
    Gedlion Gedlion January 2013 Development
  • +3e filebrowserHello everyone, Im writing a game/program loader for the +3e (with an IDE interface, but it can work with floppies too). The program lets you choose…

    ... very handy for this sort of thing.

    [code] org ... (T_ADDR),a
    pop de ;address of quoted file name in WORKSP ...
    Battle Bunny Battle Bunny January 2013 Development
  • How to use RIP - Real Information PackerI am investigating the use of data compression utilities apart from Einar's excellent ZX7. I am particularly interested in those which can run on a S…

    ... am able to change many of the addressess - respecting the same ... code place, i.e. the address of the compressed file, which stays ... ; 31200 would be the lowest address I could use for what ...
    Alessandro Grussu Alessandro Grussu January 2013 Sinclair Miscellaneous
<1…26272829303132…34>

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