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<1234567…34>
  • Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…

    ... ://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my evil regression ...
    Philip Kendall Philip Kendall March 2008 Hardware
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…

    ... /> My program will have the LDIR instruction in non-contended memory ... to the duration of a LDIR instruction (normally 21T) means ... that when LDIR synchronises with the gaps in ... per byte.

    Using LDIR to scroll the full screen ...
    ajmoss ajmoss June 2010 Development
  • Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…

    ... long time that uses an LDIR instruction to move the screen ...
    mjwilson mjwilson January 2012 Sinclair Miscellaneous
  • Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…

    ... 'm doing some tests; running Fusetest, the machine is seen as ...
    adorigatti adorigatti May 2012 Emulators
  • Quickest way to fill the attributes using LDIRI'm looking for a small routine to fill the entire attribute area of the memory with a single value, I've used LDIR in the past, but forgotten how to…

    I'm looking for a small routine to fill the entire attribute area of the memory with a single value, I've used LDIR in the past, but forgotten how to do it... :confused:
    daveysludge daveysludge August 2012 Development
  • Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …

    ... +3 emulation now pass the fusetest, FWIW.
    + Added support for ... .
    + Monitor can step over LDIR, INIR and other block commands ...
    Arjun Arjun January 2013 Emulators
  • Addressing mode of LDIR and LDDRWhat addressing mode would the instructions LDIR and LDDR be classed as using? Would I correct in thinking that they're register indirect, as both t…

    What addressing mode would the instructions LDIR and LDDR be classed as using?

    Would I correct in thinking that they're register indirect, as both the source (HL) and destination (DE) registers are pointing into memory?
    cmonkey cmonkey January 2015 Development
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... relying on ROM calls or LDIR) as a learning exercise. What ... this code is faster than LDIR because that is operating on ...
    ST1 ST1 November 2018 Development
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    The LDIR test from [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]Fuse's test suite[/url]?
    Philip Kendall Philip Kendall July 2007 Hardware
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    [QUOTE=Philip Kendall;205632]The LDIR test from [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]Fuse's test suite[/url]?[/QUOTE]

    Thanks Phil. I've pulled that and will give it a go tonight.
    csmith csmith July 2007 Hardware
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... ://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url] on the Harlequin ... the BIT test, DDA test, LDIR test and an IN test ...
    csmith csmith September 2007 Emulators
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    ... /> Ok, i've just run Fusetest on my real 128k and ... /> Frame Length: 0x8000 + 0x94fc
    LDIR: failed (0x02)
    Contended IN ...
    Jon Needle Jon Needle November 2007 Hardware
  • Quick test (2)Could I ask any 128 / +2 / +2A / +3 owners to test the new version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]fusetest[/url] on thei…

    ... ://www.shadowmagic.org.uk/spectrum/fusetest.tap]fusetest[/url] on their machines ... )...passes
    daa.....passed
    ldir.....failed(0x02)
    contened in ... )...passed
    daa.....passed
    ldir.....failed(0xfb)
    contened in ...
    Jose_Leandro Jose_Leandro November 2007 Hardware
  • Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…

    ... a cold Timex TC2048
    fusetest:
    [CODE]
    Frame length ... )... passed
    DAA... passed
    LDIR... failed (0xfe)
    Contended IN ...
    Fred Fred March 2008 Hardware
  • Which is the most technically accurate Spectrum Emulator?Ok, which is the most technically accurate Spectrum Emulator? Please don't just vote but give reasons why.

    ... /> OUTI... passed
    LDIR... passed
    Contended IN... ... /> OUTI... passed
    LDIR... passed
    Contended IN ... [code]
    |-------------------------------------------------------
    | Emulator | Fusetest | Z80 Test Suite | Total |
    rich_chandler rich_chandler June 2009 Emulators
  • Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…

    [QUOTE=Philip Kendall;621168]Run fusetest and post a screenshot of ... )... passed
    DAA... passed
    LDIR... passed
    Contented IN... passed ...
    Alessandro Grussu Alessandro Grussu April 2012 Emulators
  • Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…

    ... reported that latest version of "fusetest" locks up on a real ... using the latest version of "fusetest" on a real TK90X, ... passed
    OUTI... passed
    LDIR... failed (0x7f)
    Contended IN ... "contention" and "iocontention" from fusetest didn't work.[/I]
    Einar Saukas Einar Saukas May 2012 Emulators
  • Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…

    ... a hidden screen, and then LDIR to real screen at interrupt ...
    windenNTW windenNTW July 2003 Games
  • IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…

    ...
    ld (hl),229
    ldir

    ld hl,58853 ...
    ekoman ekoman July 2004 Development
  • Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…

    ... , and block instructions except LDI,LDIR,LDD,LDDR). I run the ...
    GOC GOC July 2004 Development
  • 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 …

    ... [/url]

    Instead of LDIR or multiple LDI's I ...
    LD (HL),%01000111
    LDIR


    MAIN:
    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 …

    ...
    LD BC,1800h
    LDIR

    MAIN:

    robpearmain robpearmain September 2004 Development
  • Fastest way to write something to screen$Hi, I just got pasmo.exe and start playing with attr scrolling, well, not scrolling, just write different values to a block and see if I can introdu…

    ... the screen. I know that ldir/lddr are slow, but not ...
    AE.Vasconcelos AE.Vasconcelos April 2005 Development
  • Push/Pop methodMachine code question: Could somebody explain, how do we use the stack in assembler to copy data from one place of memory to another? I've heard it i…

    Machine code question:
    Could somebody explain, how do we use the stack in assembler to copy data from one place of memory to another?
    I've heard it is one of quickest methods, faster then e.g using ldir or writing a loop.
    Is it true?
    Ralf Ralf July 2005 Development
  • Old emulators on DOSBOX.Sadly, my Win'98 machine is going loco a bit too often. I've finally decided that I'll have to move everything over to the noisy, underused XP machi…

    ... : :)

    (Z80 V3.02 - LDIR on, all other slowdowns off ...
    Jmk Jmk November 2005 Emulators
  • Optimisation Needed! Is this the Fastest way to copy bytes from screen and back again?I have the screen address (say 0,0 i.e 16384) I want to copy 4 bytes wide by 32 bytes high from the screen to an area of memory. I then want to cop…

    ...
    ld bc,6143
    ldir

    ; Copy from store ...
    robpearmain robpearmain November 2005 Development
  • Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…

    ...
    ld (hl),a
    ldir
    pop bc
    djnz ...
    jp jp August 2006 Development
  • Mode 2 Tile Editor SourceA Timex Mode 2 Tile Editor incorporating a byte mirror table. The compiled version is available in the CSSCGC 2008 collection from the WoS archive. …

    ... remaining bytes to clear
    ldir ; wipe screen
    ret ; done ...
    chev chev January 2007 Development
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... /> ld bc,$4000 ; length
    ldir ; copy

    ; page ... /> ld bc,$2000 ; length
    ldir ; copy

    ; emulate ... /> ld bc,13 ; length
    ldir ; copy

    ; ... /> ld bc,22 ; length
    ldir ; copy

    ; move ...
    chev chev March 2007 Emulators
<1234567…34>

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Related Threads

  • Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
  • Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said:<br /> <br /> [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg use…
  • Fusetest port 0x7FFD test resultsHi,<br /> I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform.<br /> <br /> I'm doing some tests; running Fusetest,…
  • Quickest way to fill the attributes using LDIRI'm looking for a small routine to fill the entire attribute area of the memory with a single value, I've used LDIR in the past, but forgotten how to…
  • Addressing mode of LDIR and LDDRWhat addressing mode would the instructions LDIR and LDDR be classed as using?<br /> <br /> Would I correct in thinking that they're register indirec…
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

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