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  • Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…

    ... use two versions of routines: fast with stack manipulation and slow ... -safe and predict if the routine to exececute is going to ... . if not, i will use fast routine else code fallback into safe ...
    Fikee Fikee November 2010 Development
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ... br /> I have written a routine that allows a blue bar ... POKE 23693,BluWhi0:
    PRINT AT 1,0;b$
    PRINT AT 3,0;b$
    PRINT AT 5,0;b$
    PRINT l$(1, TO 32):
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Help needed with simple MCode routineI'm trying to code a routine to clear the screen and I can't figure out why it's not working: ld hl,16384 ld bc, 6144 loop:ld (hl),0 inc hl dec bc l…

    ... 'm trying to code a routine to clear the screen and ...
    Rebelstar without a cause Rebelstar without a cause November 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…

    ... 'm trying to write a routine that will take an X ...
    sekrets sekrets December 2010 Development
  • Fuse too fast on karmic ubuntuI have tried various types of Fuse, including the .deb file from the Ubuntu site and binaries and source code, and the results are all the same when …

    ... />
    The emulation runs too fast and the sound is corrupted ...
    john999 john999 December 2010 Emulators
  • Screen$ command, ROM routineHi All, Does anyone know which ROM routine to call for the Screen$ command (and/or the ATTR command)? Any comments on how well it works or the spee…

    ... /> Does anyone know which ROM routine to call for the Screen ...
    R-Tape R-Tape January 2011 Development
  • Fast LogsAnyone know of a fast ln function I can steal? The ROM function seems to be hideously slow. I wrote a look-up table dirty and less accurate sin func…

    Anyone know of a fast ln function I can steal? ...
    Gedlion Gedlion March 2011 Development
  • IM2 calls to player routine on 128k?Hi all, Apologies for being crap, and not even in a funky, skillo kind of way but it's been over 20 years since I last wrote anything in machine cod…

    ... found that calling the play routine before halt keeps munging my ...
    SnakeOilSteve SnakeOilSteve March 2011 Development
  • Utility or routine to save/display imagesLet's assume I have an image or sprite at coordinates x,y with w witdh and h height. If I were to store this image, which storage method would allow …

    ... an utility or any available routine that would allow me to ... also have a machine code routine which can turn an are ...
    zxbruno zxbruno March 2011 Sinclair Miscellaneous
  • quick - Zx80 ASM questionWhile I am ploughing through lots of ASM listings, one of my earlier adaptation attempts surprised me [B][asm code][/B] [code] org 32768 start: ld…

    ... /> call $1601 ; select print channel using ROM
    ... call printtext ; call printline routine
    ld hl,text2 ...
    printtext: ; routine to print out a line
    ld ... ; condition met to end the routine
    ret ; return.
    Zetr0 Zetr0 May 2011 Development
  • fast font engine possible?inspired by the recent "proportional font" thread for zx basic and ideas for gui and having done some of the work on this in the past i wonder if it …

    ... is possible to have a fast raster font engine on zx ... character width). this would enable fast 8-bit calculations for measure_font ... experience ... do you believe ultra-fast draw_text could be made using ...
    tstih tstih May 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    How do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and ink but can't figure it out.

    Sincerely,

    Ooze48k
    ooze48k ooze48k June 2011 Development
  • Speeding up select processing...Hi Folks, I have the following code in my program and it works fine but is rather "sluggish". I have even moved it to the beginning of the program …

    ... POKE attrp,VAL "112":
    PRINT AT t(1),0,,,,:
    routine exists allowing page left/right ... the cool basic memory move routine and go to line 270 ... the cool basic memory move routine to store the attributes (s ...
    Paddy Coleman Paddy Coleman June 2011 Sinclair Basic
  • (part of) screen to UDGHere is a routine to copy a Y,X-position on screen to a UDG. 0<=y<=23 0<=x<=31 144<=udg<=165 (UDG "A" to UDG "U") [code] ; start code with ; PRINT …

    Here is a routine to copy a Y,X-position on screen to a UDG.
    0
    Dr BEEP Dr BEEP June 2011 Development
  • Help with random numbers......Hi all, wonder if anyone can help me... sort of a novice here ... I have been trying to write a simple ish basic program to compare random sets of n…

    ... a little (poorly written routine) to print out the results of ... numbers that the random generating routine (that i thought would ... 40
    130 REM PRINT RANDOM NUMBERS IN SETS ... TO C1+5
    160 PRINT X(F);",";" ";
    ... 180 LET C1=C1+6: PRINT
    190 IF C1 ...
    loonix loonix July 2011 Sinclair Basic
  • Google Cloud PrintI use Firefox more than the Chrome browser as it surfs the WOS ftp data better. However I was looking at the Options (Under the Hood) when I noticed …

    ... ) when I noticed Google Cloud Print Beta. This has been available ... in hospital and he can print from his phone to my ...
    Geoff Geoff July 2011 Chit chat
  • Z80 DOS Sorry this computer is too fast!I?ve tried the free Z80 Emulator v4.00 (DOS Version) downloaded from Gerton Lunters Homepage on my Intel Core2 Quad Q60 running at 2,40 GHz an it ju…

    ... /> Sorry --- this computer is too fast!
    ----- Snap -----

    Can ...
    Luzie Luzie August 2011 Emulators
  • Pixel Pimp, graphics utilityHi All, [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/pixelpimp.gif[/IMG][IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes…

    ... use the ROM save/load routine, in the end I decided ... data can be saved or print peeked etc (though I will ...
    R-Tape R-Tape September 2011 Development
  • checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…

    ... this [thread=35728]Keys redefine routine and key check[/thread] thread ... /> 5 LET bc=0: PRINT bc;"=";: PRINT ,FN b$(bc,10,2 ... 0011000000111001) then:
    [code]
    PRINT FN b$(FN h(12345 ... the reverse:
    [code]
    PRINT FN b$(00110000,2,10 ...
    Battle Bunny Battle Bunny September 2011 Sinclair Basic
  • Justin Beeper - new demo for the unexpanded 16K Speccy[img]http://pouet.net/screenshots/57726.png[/img] This was my entry for this weekend's [url=http://www.sunrisedemoparty.co.uk/]Sunrise[/url] demo pa…

    ... stylee, and the lack of fast memory on the 16K means ... ), relying entirely on the BEEP routine in the ROM. And doing ...
    gasman gasman September 2011 Announcements
  • 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…

    ... tile based rendering and scrolling routine.

    It draws in ... as a test of the routine it serves it's purpose ... result in DE for draw routine

    draw_tile ld hl ...
    ld (position_var),hl ; Reset print position

    ret
    Zoltar Zoltar September 2011 Development
  • saving part of a BASIC programHere's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to …

    Here's a short routine to save part of a ... $(2 TO 11)=" " THEN
    PRINT #0;"F Invalid file name ... +CHR$ 128+l$
    9994 PRINT #0; FLASH 1;"m/c ...
    Battle Bunny Battle Bunny September 2011 Sinclair Basic
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... So here's a routine to provide all of the ... 7
    19 PRINT "OpCd A"
    20 PRINT "CPL ";a,"= ... +VAL "(,a"
    23 PRINT "RRC ";a,"= ";USR 40021 ... +VAL "),a"
    24 PRINT "SLA ";a,"= ";USR 40021 ... +VAL "{,a"
    33 PRINT "RR ";a,"= ";USR 40021 ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... of my text printing routine for the intro screen ... ret

    printline: ; Routine to print out a line
    ld ... a,(hl) ; Get character to print
    cp 0 ; See ...
    sack sack October 2011 Development
  • Find-Fill-Copy functions for BASICThere's not much going on here, so here's three m/code routines to provide some data manipulation functions which are otherwise slow to do from BASIC…

    ... two versions of each routine, using either:
    "PRINT USR r0,p1 ... fixed point then the 'initsr' routine can be discarded (this alters ... assembler listing is so that routine addresses can be calculated by ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • tiny routine to shift RAMTOP & stackCompressing some data areas above RAMTOP and wanting to make the released space available for BASIC arrays, I needed to move RAMTOP without using CLE…

    ... last segment of the CLEAR routine to finish off. It could ...
    Battle Bunny Battle Bunny November 2011 Sinclair Basic
  • Print Screen not Working on Windows 7I know I know this is chit chat and not a tech support forum. I ask here because the info on the web about this issue is generally shyte. I'm asking …

    ... the feature of pressing the "Print Screen" to commit the current ... but screen dumping via the print screen feature does nothing.
    print screen key on this laptop ... how can I restore my print screen feature, I've tried ...
    Scottie_uk Scottie_uk November 2011 Chit chat
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