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  • Calculate screenaddressWho knows where the topic about the fastest screenaddressroutine is? I can't find it in a search.. The fastest routine was to load a large table of …

    ... L,C
    LD A,(HL) ; first part of lo-byte ... /> INC H
    ADD A,(HL) ; Calculate Lo-byte
    INC ... H
    LD H,(HL) ; Fetch Hi-byte
    LD ... L,A
    RET ; HL holds screenaddress


    Dr BEEP Dr BEEP August 2004 Development
  • what format is .mgt ? (and other Outlet discuss)The Outlet magazine archives have .mgt extension. What is that ? On the other hand, the news from August 15 2004 tells that "... TZX Vault update: O…

    The Outlet magazine archives have .mgt extension.
    What is that ?

    On the other hand, the news from August 15 2004 tells that "... TZX Vault update: Outlet (complete) ...". I think that this statement will only be true when the complete ...
    secarica secarica August 2004 Sinclair Miscellaneous
  • Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…

    ...

    ; On Entry:
    ; HL Contains Screen Address
    ; DE ... -23)
    ; On Exit
    ; HL Contains Screen Address
    ; BC ...
    robpearmain robpearmain August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ...

    ; On Entry:
    ; HL Contains Screen Address
    ; DE ... -23)
    ; On Exit
    ; HL Contains Screen Address
    ; BC ...
    robpearmain robpearmain August 2004 Development
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... is, in the .SNA file format, byte 19 is designated to ...
    Erlstoned Erlstoned August 2004 Development
  • RETRO GAMER ISSUE 7 now available to pre-order!Retro Gamer issue 7 will be available to buy from August 31st, and copies can now be pre-ordered from [url="http://www.retrogamer.net"]http://www.ret…

    ... the UK's first multi-format retro event. In our report ...
    RandySparks RandySparks August 2004 Announcements
  • Mobygames.com have added the Spectrum!As you may remember, I posted a petition to persuade the multi-format games information site [url="http://www.mobygames.com"]www.mobygames.com[/url] …

    ... petition to persuade the multi-format games information site [url="http ...
    MartinUK MartinUK August 2004 Sinclair Miscellaneous
  • ANN: Tipshop updated Monday, 30 August 2004Monday 30 August 2004 Finally got caught up on Tipshop updates - lots of good stuff The Italian Project, and assorted Real Life things have meant I…

    ... /> These were originally in Word format, so
    I've saved ...
    Word's Save As format, which will explain the large ...
    hackersanon hackersanon August 2004 Announcements
  • Cricket by TJ OwensHi everyone ( Newbie here ) Just wondering if there are any fans out there of the old Speccy game Cricket by TJ Owens, it came out in about 1984 ? …

    ... this game to an extended format ?

    I'm not ... is in a One day format, but seems to me to ...
    RideonTime RideonTime September 2004 Games
  • Recording VOC FilesHi, I need a program to record and save files in the VOC format. I have been using Cool Edit 2000 Trial Version but for more than 30 days so now th…

    ... save files in the VOC format.

    I have been ...
    Deano7649 Deano7649 September 2004 Sinclair Miscellaneous
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... /> LD (HL), E
    INC HL
    LD (HL), D
    INC HL
    LD (HL), E
    INC HL
    LD (HL), D
    INC HL
    robpearmain robpearmain September 2004 Development
  • Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …

    ... (HL),%11111111
    INC HL
    LD (HL),%00000000
    INC HL
    AND (HL) ; And With HL
    LD (HL),A
    ... br /> AND (HL) ; And With HL
    LD (HL),A
    ...
    robpearmain robpearmain September 2004 Development
  • Speccy DVDI've been carrying out some experiments with footage from Robocop for this project and it looks good so far. For the format, I was considering maki…

    ... far.

    For the format, I was considering making a ...
    zeropolis79 zeropolis79 September 2004 Sinclair Miscellaneous
  • Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…

    ... /> Take the instruction SET b, (HL).

    This is broken ... 12T longer than the normal (HL) instruction: 4T to read the ...
    GOC GOC September 2004 Development
  • Checksums in Hobeta filesDoes anyone here have any experience with working with the internals of the Hobeta (aka .$b, .$c ...) file format, or failing that, checksum algorith…

    ... Hobeta (aka .$b, .$c ...) file format, or failing that, checksum algorithms ...
    gasman gasman September 2004 Development
  • TZX and the ZX81Evenin All. EightyOne is now is a state where I can support a more descriptive tape format. I know how some people have been calling for tzx suppor…

    ... support a more descriptive tape format. I know how some people ... described in the TZX File Format but it doesn't have ...
    MikeW MikeW September 2004 Emulators
  • Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…

    ... /> RR L

    ADD HL,HL ;MULTIPLY BY 2 (2 byte ...

    LD (MODHLA+1),HL ;HL HOLDS ADDRESS IN BACKGROUND DATA ... blank.

    EX DE,HL ;HL = Screen addr.
    LD BC ... ,AF'

    EX DE,HL ;HL = SCREEN ADDR.

    ...
    dmsmith dmsmith September 2004 Development
  • +3 Disk Drive "B:"Help me please! I've Googled 'till I can't Google no more. Is there an EASY way to fit a 3.5" FDD to the drive B: connector on the +3, and when it i…

    ... file operations (with the wrong format etc) I have a program ...
    guesser guesser September 2004 Sinclair Miscellaneous
  • The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…

    ... 256 times
    ld b,(hl) ; B = high byte or ... carriagereturn in ROM
    inc hl ; Goto next byte in table ...
    ld e,(hl) ; Fetch 'last' byte in ... table
    prbyte ld a,(hl) ; Fetch byte for print
    Dr BEEP Dr BEEP September 2004 Development
  • Index register subtractionHi, Just wondering if there a way to perform SBC HL,BC on the IX or IY registers. I can't find an op code for it, and my assembler doesn't recognise…

    ... a way to perform SBC HL,BC on the IX or ... seems strange however that ADD HL,BC can be prefixed to ...
    dmsmith dmsmith September 2004 Development
  • Original demonstration ZX Microdrive cartridgeAnybody knows where to get original snapshot of all programs and games that came on original ZX Microdrive cartridge in *.mdr format? [ This Message…

    Anybody knows where to get original snapshot of all programs and games that came on original ZX Microdrive cartridge in *.mdr format?

    [ This Message was edited by: Uros Zupan on 2004-10-02 19:06 ]
    Uros Zupan Uros Zupan October 2004 Sinclair Miscellaneous
  • Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…

    ... this is translated into a format which the screen redrawing routine ...
    dmsmith dmsmith October 2004 Development
  • Jack The Nipper 2 Masking ... HowI understand masking i.e. ld a,(de) ; Get Mask and (hl) inc de ld a,(de) ; Get graphic or (hl) But how on Jack the nipper did they get the main ch…

    I understand masking

    i.e.

    ld a,(de) ; Get Mask
    and (hl)
    inc de
    ld a,(de) ; Get graphic
    or (hl)

    But how on Jack the nipper did they get the main character to go Behind the scenery?
    robpearmain robpearmain October 2004 Development
  • ANN: Italian Project Guess The Game gallery - MASSIVE UPDATE!Hello chums.. Seeing as the test I did with the Italian Project screenshots gallery was a massive success, I've written myself a webpage generator s…

    ... JPG, it now uses GIF format for both thumbnail and full ...
    hackersanon hackersanon October 2004 Games
  • New Game Production ChallengeGreetings to all the communiy :) I have been around long enough to see that there are some very good spectrum programmers out here. Now, [start obvi…

    ... Z80, SNA, TAP or TZX format. I do not need in ...
    alban lusitanae alban lusitanae October 2004 Games
  • NEW CRONOSOFT RELEASESHi all, A few things happening at the moment, which may be of interest ... PLATFORM GAME DESIGNER ----------------------- A surprise this one... …

    ... , Atari 800, and possibly every format known to man, including Philips ...
    chaosmongers chaosmongers October 2004 Games
  • Announce: EmuZWin 2.5 Release 2.2 Post-FinalEmuZWin Version 2.5 Release 2.2 post-FINAL (16-Oct-2004): [-] A small pause added between TAP blocks while loading tape from .TAP image (otherwise s…

    ... , GS, RZX (possible), formats .UDI, .SLT, Net-Play. Estimated release of ...
    Vladimir Kladov Vladimir Kladov October 2004 Emulators
  • MIA - The Mural and MicromanAfter a recent visit to my parent house I discovered that they actually still had all of my old spectrum games in storage - several hundred programs …

    ... to TZX or any other format. So my question is, is ...
    JohnD JohnD October 2004 MIA/STP/SDP
  • Desperately seeking.........Hiya :D Basically Im after any New Generation Software either games or programs, on any format of computer. Once I have the full collection, I will …

    ... games or programs, on any format of computer. Once I have ...
    Rach Rach October 2004 Wanted
  • Technical question re. filename lengthsI've recently acquired a few interesting Manic Miner editors by R D Foord dated 1985. During the dumping process, I've come across a couple of block…

    ... extended filenames using the .tzx format?

    Am I missing ...
    Gilby Gilby November 2004 Sinclair Miscellaneous
<1…15161718192021…34>

Latest Posts

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    moggy on 9:07PM
  • Happy 40th Birthday to the Amstrad CPC464!
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  • 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

HitBox

Word Docs Hits
slt 81 106
format 11.3K 16K
hl 6.2K 48K

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