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<1…10111213141516…34>
  • Floating point representationI'm planning on picking up the [url=http://matt.west.co.tt/category/spectrum/openzxrom/]OpenZXRom[/url] project from where I left off a few months ba…

    ... mantissa) containing the most significant 32 bits of the number, and ... of those integers except for 0 can be represented in the ... still have to deal with 0 as a special case, but ...
    Alcoholics Anonymous Alcoholics Anonymous October 2006 Development
  • Not so BRIGHTOk, on the Spectrum I'm a crayon man so I don't know much about the coding. If I create a graphic in, say, SevenUp or TommyGun and the graphic is not…

    ...
    30 DATA 33,0,88,1,3,0
    40 DATA ... DATA 35,16,249,13,32,246
    60 DATA 201 ...
    BloodBaz BloodBaz October 2006 Development
  • Oh so BRIGHT!What is the SLOWEST way to change the attribute area to BRIGHT? It has to be legit! No meaningless instructions or doing stuff for the sake of it. …

    ... /> 20 LET x=INT(RND*32)
    30 IF y> ... ;21 THEN PRINT #0;AT y-22,x; PAPER ...
    gasman gasman November 2006 Development
  • Oh so BRIGHT!What is the SLOWEST way to change the attribute area to BRIGHT? It has to be legit! No meaningless instructions or doing stuff for the sake of it. …

    ...
    10 LET boxposx=0: LET boxposy=0
    11 LET boxbigx ... 1;0,boxbigy: DRAW BRIGHT 1;-boxbigx,0: DRAW BRIGHT 1;0,-boxbigy ... ,0: DRAW 0,boxbigy: DRAW -boxbigx,0: DRAW 0,-boxbigy
    17 BRIGHT 0: OVER 0 ... /> 1000 LET l=x+(y*32): LET a=PEEK (22528+l ...
    Arda Arda November 2006 Development
  • Spectrum +2a Keyboard bug?If anyone has a Working +2a... I bought a +2a for Christmas 1986 with an 80 Column thermal printer from Dixons. It was bundled with a tape supposed…

    ... 's, and bridged them with 0.1uF caps. Helped an awful ... not be a big enough delay.

    Or you could ...
    Laser Laser November 2006 Hardware
  • 128k Page FlippingOver on adverts, AOwen wrote the following: [quote=aowen]The trick, as I understand it, is to redraw the whole screen each time at #c000, but point…

    ... to 7 and screen to 0
    ld a,%10111
    ld bc,192*32
    ldir
    ld hl ... ),%11110000
    ld bc,192*32
    ldir
    ld hl ...
    robpearmain robpearmain December 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... you plan to page in 0-16k of the dock permanently ... would have code starting at 0 in the DOCK. A cartridge ... screen mode without a massive delay loop that would suck the ...
    Alcoholics Anonymous Alcoholics Anonymous December 2006 Development
  • Tranferring a game back to +3 disk?Hi, Haven't been on here for ages, but got my Spectrum down from the loft recently, due to a house move in the next few months. I'd forgotten, but so…

    ... Robocop 2.dsk]
    Head 0, 42 tracks:
    250Kbps MFM ... 9 sectors, 512 bytes:
    0:0 193 198[d] 194[d ... , 8192 bytes:
    1:0 193[dc,d]
    2 ... 70 71 72 73
    32:0 65 66 67 68 69 ... 72 73
    40:0
    41:0 [/code]
    Robocop 1 ...
    obo obo January 2007 MIA/STP/SDP
  • I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…

    ... :

    Cycle # Delay
    ------- -----
    14335 6 ... 14341) no delay if A14=1,A15=0 or iorq ... +mreq=00
    14336 5 ( " " ) no delay ... if A14=1,A15=0 or iorq+mreq ...
    Mp Mp February 2007 Development
  • don't go Vista matesaGreetings. As you well know, there has been a massive campaign to push Vista into the users. I'm against it and always will be. Most of the ancient s…

    ... 64 bit vista support for 32 bit apps - not sure if ... it actually supports 32 bit apps.[/QUOTE]
    32-bit apps run ... well as they do under 32-bit Vista, which depends on ... , due to new session 0 security restrictions. 32-bit kernel mode drivers ...
    obo obo February 2007 Chit chat
  • Complex DRAW command?After looking at some Speccy code I noticed that the DRAW statement is used to draw lines (or it looked that way). On the Coco, the LINE command was…

    ... /> 12 PLOT 100,88: DRAW 0,-.000009,252*PI/1.5 ... /> 24 PLOT 150,90: DRAW 0,.000015,252*PI/.6666666666
    32 PLOT 60,60: DRAW 150,0,252*PI/2 ... PLOT 120,140: DRAW .000005,0,252*PI/3
    50 ... PLOT 120,20: DRAW .0002,0,252*PI/1.16666666
    Marcelo Marcelo February 2007 Development
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... char)
    ==============================
    [size=0]
    #C3F1 SPACE....................#C4F9 A ... BACKSLASH.............#C571 P
    #C471 0...........................#C579 Q
    #C479 ... used plus there are four (32 bytes worth) that look unassigned ...
    Mr. Anonymous Mr. Anonymous March 2007 Development
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... hive firing gun
    defb $32, $01 ; ceiling hive firing gun ... of that tile, e.g. 0,0,0,0 and there is no collison ... 1,0,1,0 and you only collide ... left side/top and bottom, 0,0,1,1 is collision with ...
    FrankT FrankT March 2007 Development
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    [QUOTE=Woody;175128]blah[/QUOTE]

    Here he is! :)

    Edit:

    Here's the other info: A bit quick otherwise it'd have been weekend.

    table a1f6
    ========

    (this will need relocating/updating ...
    Mr. Anonymous Mr. Anonymous March 2007 Development
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... left, 5th byte bottom right. 0 for no collision, 1 for ... hive firing gun
    defb $32, $01 ; ceiling hive firing gun ...
    FrankT FrankT March 2007 Development
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... need to output pixels every 0.5 z80 cycles = 2 Atmega ... you can do 16 or 32 bit loads), shifting out a ...
    Alcoholics Anonymous Alcoholics Anonymous March 2007 Sinclair Miscellaneous
  • Printing UDGs in BASICAfter looking a little through Winer Milly's code, it struck me that I might be able to speed up my Cybernoid editor by replacing: FOR a=0 TO 31: PR…

    ... />
    FOR a=0 TO 31: PRINT CHR$32+a : NEXT a ... CONTAIN A STRING OF THE 32 UDGs I WANT PRINTING]"[/QUOTE ...
    Paul van der Laan Paul van der Laan March 2007 Sinclair Basic
  • Printing UDGs in BASICAfter looking a little through Winer Milly's code, it struck me that I might be able to speed up my Cybernoid editor by replacing: FOR a=0 TO 31: PR…

    ... />
    FOR a=0 TO 31: PRINT CHR$32+a : NEXT a ... CONTAIN A STRING OF THE 32 UDGs I WANT PRINTING]"
    32 characters from space and further ... is faster:
    PRINT CHR$32, CHR$33
    or
    Dr BEEP Dr BEEP March 2007 Sinclair Basic
  • Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…

    For a function that gives you each line too:

    [code]
    DEF FN a(y,x,l)=16128+x+32*y+1792*INT(y/8)+l*256
    [/code]

    Where l takes the values 1 to 8. Change the 16128 to 16384 if you want to use 0-7 for the line numbers.
    Matt_B Matt_B March 2007 Sinclair Basic
  • CRC checkHi all, I'm trying to implement a way to check if two or more tzx files are identical or not on my app, so I would need a simple way to get an uniqu…

    ... /> 20 LET A=0
    30 FOR B=0 TO 16383
    31 LET C=A
    32 LET ...
    Geoff Geoff March 2007 Emulators
  • Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…

    ... code]3000 LET x=0: LET y=0: LET z=127
    32), (z-PEEK (22528+x ... +(y*32)))
    3138 LET x1 ... =y
    3139 PAUSE 0
    3140 IF INKEY ... LET x=0
    3190 POKE 22528+x1+(y1*32), (z ... -PEEK (22528+x1+(y1*32)))
    ...
    48K 48K March 2007 Sinclair Basic
  • Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…

    ... /> 3000 LET x=0: LET y=0: LET z=127: ... LET a=0: LET b=0: BORDER 1
    ... [code]3000 LET x=0: LET y=0: LET z=127: LET ... a=0: LET b=0: BORDER 1: LET ... (22528+x+a+((y+b)*32)))
    3150 RETURN
    ... ,9;"MOVE SELECTION": LET m=0
    4280 RETURN
    48K 48K March 2007 Sinclair Basic
  • Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…

    ... [code]3000 LET x=0: LET y=0: LET z=127: LET ... a=0: LET b=0: BORDER 1: LET ... m=0
    3010 PRINT #1 ... (22528+x+((y+b)*32)))
    3133 POKE 22528 ... (22528+x+a+((y+b)*32)))
    3150 RETURN
    ... 9;"MOVE SELECTION": LET m=0
    4280 RETURN[/code ...
    48K 48K March 2007 Sinclair Basic
  • Bubble Bobble EditI thought I might have a go at editing Bubble Bobble myself after reading this... [url]http://www.worldofspectrum.org/forums/showthread.php?t=15452[…

    ... 4 3 2 1 0
    128 64 32 16 08 04 ...
    Mr. Anonymous Mr. Anonymous April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... DrawLine:
    ld bc,32 ;number of bytes per line ... de,hl
    ld bc,32
    scf
    ... br /> ld bc,0
    ldi x 32
    ex ... bc starts at 0, it'll be -32 after thirty- ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • Diminishing MircodrivesHi All Got my first ever set of MD carts today and have been fiddling around - I have what seems to be 9 blanks and the Demo cart. The demo cart loa…

    The BASIC program creates a 32 byte-microdrive map and prints ... bits on the screen as '0' for usable and '1' for ...
    Geoff Geoff April 2007 Hardware
  • DVD's and CD's ?5 eachI'm a bit of a fan of Play.com for buying dvd's and this offer is a beaut [url=http://play.com/DVD/DVD/campaign/2-/3851/2-/Promo.html]898 DVD's for …

    ... to avoid toll&customs delay.[/QUOTE]
    And so they ... paid a grand total of ?0.00 for them :lol:
    VincentAC VincentAC April 2007 Chit chat
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... a massive saving over adding 32!
    [/quote]

    These ... down in the display.
    ; (0,0) is located at the top ... advance lines, with DE holding 32 throughout. Unrolling the drawing loops ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... loading those registers with 7,32,8... to speed up execution ... /> LD A,_positionX X position (0-31) is MSB part of ... /> ADD A,A Y position (0-127) is now LSB of ...
    omega omega May 2007 Development
  • PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…

    ... various aspects of PZX 0.1 draft, and thinking ... ,855 to 0,855,855,0 for bit 0 and similarly ... follows:

    0 u16 - repeat count
    2 ... duration is stored in next 32 bits. Note that it ... create arbitrarily long pulses (32 bits alone is enough for ...
    Patrik Rak Patrik Rak May 2007 Emulators
<1…10111213141516…34>

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