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<1…20212223242526…34>
  • 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…

    ... . ( so don't erase, then calculate new position, then draw - hold ... - the extra space covers the bit that would be left behind ...
    Gedlion Gedlion October 2012 Sinclair Basic
  • I am currently watching.....This stems from a rant Mel did months ago on the currently listening to thread, and he suggested starting a thread like this to somebody (sorry can't…

    ... see why he needed a mask in this one either as ... got on my nerves a bit ;-)

    The 3D was ...
    Bermondsey Bob Bermondsey Bob December 2012 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 …

    ... rl d ; insert previous bit into D
    next_bit ... a, a ; check next bit
    ret nz ; no ... 128);
    for (mask = 1024; mask > 127; mask >>= 1) ...
    antoniovillena antoniovillena January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... would need a full-screen mask to keep record of what ... that are repeated, but slightly bit-shifted.
    joefish joefish January 2013 Development
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... amp; mask);
    else
    for( mask= 2048; mask; mask>> ... nc, copy_byte_loop ; next bit indicates either literal or sequence ... a, a ; check next bit
    ret nz ; no ...
    antoniovillena antoniovillena January 2013 Development
  • Game of 1988 and ArkanoidI chose Arkanoid for 87 as I'd always loved Batty - and believe it or not - have wonderful memories of thru the wall with my brother and late dad. S…

    ... , and with the identikit puzzle bit]
    ikari warriors
    cybernoid ... arcade/adventure, I suppose]
    mask III: venom strikes back
    WhenIWasCruel WhenIWasCruel January 2013 Games
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... a simple algorithm to calculate a 16-bit sum with rotation (result ... content
    inc de
    bit 6,d
    jr z ...
    Einar Saukas Einar Saukas February 2013 Development
  • TommyGun with AGDHi everyone, I have been working with Jonathan to incorporate his excellent Arcade Game Designer utility into TommyGun. Jonathan has created a compi…

    ... .

    It is a bit confusing because the texts on ... size tile and TommyGun will calculate the list of unique (8x8 ...
    Kiwi Kiwi February 2013 Development
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... to add the complete 16 bit address bus to the ULA ... ), which I can use to calculate the value of A0 during ... , A could have its 7th bit high, triggering the I/O ...
    mcleod_ideafix mcleod_ideafix March 2013 Hardware
  • Unravelling the Spectrum Floating Point Number formatHi Guys, In my head I pretty much understand how the Spectrum's 5 byte FP number format works. The first byte is the signed exponent and the follow…

    ... e as an unsigned 8-bit integer. 128 is the [I ... leading 1 bit. IBM S/360 exponents were used to calculate powers ...
    zub zub March 2013 Sinclair Miscellaneous
  • Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…

    ... your map data as 16-bit words.[/QUOTE]
    Not really ... you will probably need to calculate timing for the worst case ...
    Einar Saukas Einar Saukas March 2013 Development
  • Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …

    ... z80 opcode table on a bit of paper. I use the ... 'm comfortable with it. I calculate jumps for jr instructions by ... have an inline assembler, a bit like the one built into ...
    jamorski jamorski March 2013 Development
  • Tracking down the last few bugsHi all. My emulator nears completion. Like many, I have tested against the FUSE suite of tests, and my emulator passes every one. However, I still h…

    ... WII passes all tests except bit n, (HL) which I do ... />
    Maybe something related to bit 3 and 5 in CB ... also. The previous two tests mask out those undocumented bits of ...
    Woody Woody March 2013 Emulators
  • ZX Alien BreedNot sure if this has been mentioned already (I did trawl the threads but couldn't see anything :smile: ), but I've always hankered after a Speccy Ali…

    ... , but it can get a bit tricky to see the baddies ... 14x14 sprites so an outline mask would still fit in a ...
    joefish joefish April 2013 New game ideas
  • ZX Alien BreedNot sure if this has been mentioned already (I did trawl the threads but couldn't see anything :smile: ), but I've always hankered after a Speccy Ali…

    ... retro-ported to other 8-bit platforms. I've got a ... graphics writing.

    A bit more info about my port ... 2x2 block sprite, with no mask. I'm using a flat ... -bashed, so please be a bit patient ;)
    LuMan LuMan April 2013 New game ideas
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... addresses, with the addition of Bit 4 of $200C being Side ... (mostly) makes sense if you mask off the $2000 and convert ...
    Jmk Jmk April 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... addresses, with the addition of Bit 4 of $200C being Side ... (mostly) makes sense if you mask off the $2000 and convert ...
    zub zub April 2013 Hardware
  • Paradroid for C-64, why not in the Spectrum?Reading the special 30th anniversary Retro Gamer, I came across this game which was considered to be the best game for the C-64, and it does not look…

    ... haven't met an 8 bit computer I don't like ... wasn't sure how to mask it so decided to invert ... was let down (a little bit).
    Sadako Sadako May 2013 Games
  • Outrun Europa in colour - Level 1 ready !Instead of bumping these old threads: [url]http://www.worldofspectrum.org/forums/showthread.php?t=10754&highlight=outrun+europa[/url] [url]http://w…

    ... added to lower byte
    bit 2 ? is block mirrored in ... (1-yes, 0-no)
    bit 3 ? is block upside down ... )
    bit 5 ? autogenerate right mask
    bit 6 ? autogenerate left mask
    bit 7 ...
    Ralf Ralf May 2013 Games
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... enough, so generate a 16-bit value
    ld hl ... xor a ;set beeper output mask off
    dec d
    bit more difficult.
    Here, ...
    Part A
    - output mask ch1
    - decrease counter ch1 ...
    utz utz May 2013 Development
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... . If you have a 16-bit speed counter, decrementing the high ... ROM data
    or %11100111 ;mask unneeded bits
    xor %11100111 ...
    utz utz May 2013 Development
  • Today I met Sandy WhiteI was a total fanboy today. Got my games signed and really enjoyed his talk he did at Revival. Funny too, and a nice fella when we all quede up to ge…

    ... (including Mark) but got a bit distracted by the myriad of ... Attack & I of the Mask. The latter was the Silverbird ... seen before, which was a bit surprising.

    [Edit] - also ...
    Morkin Morkin May 2013 Games
  • Horizontal Scrolling/Per Character gamesHello. Can anyone give me the titles of some Speccy games (preferably good ones, but I don't mind hearing about bad ones too) that scroll the playin…

    ... , such that the spare bit is carried over to the ... scenery. The first complex bit is that that list of ... space. The second tricky bit is making sure that the ... and actually have a 16-bit address-map as your ... separate attribute map and a mask byte for each UDG's ...
    joefish joefish June 2013 Games
  • Top bestest games of all time.I know how much every body loves top ten lists, well today i received a book called the 1001 games you must play before you die. Are your all time f…

    ... the most popular British 8-bit ever) has around 11,000 ... (Ocarina of Time, Majora's Mask, Wind-waker, and The Twilight ...
    ewgf ewgf June 2013 Chit chat
  • Non-ZX Spectrum things that remind you of the SpeccyA good lady friend of mine who is expecting twins has recently decorated her bedroom (well, her husband did lol) and flipping 'eck - loud or what?! …

    ... Dun Darrach.... There was a mask of Loki in the chamber ... in which reminded me a bit of XOR too.

    JeffB JeffB July 2013 Sinclair Miscellaneous
  • Fast Z80Todays Spectrums are fast as hell and few software utilises this. Z80 in ReVerSE runs at 42 MHz, in Speccy2010 at 28 MHz, in Pentagon 2.666 and in N…

    ... around the screen. Some are mask, some are OR, some are ... ago?) so it's a bit old but you can still ... target only). These are 24 bit pointers for accessing memory from ... a flat 24-bit address space. The compiler inserts ...
    Alcoholics Anonymous Alcoholics Anonymous July 2013 Development
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... ). Scrolling colour RAM is a bit more complicated because it's ... at how the Atari 8-bit hardware does things; when the ... the edges of the television mask things off). It can also ...
    TMR TMR July 2013 Development
<1…20212223242526…34>

Latest Posts

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    Antiriad2097 on 5:05PM
  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21

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