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  • Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…

    ... /> l8a23: inc hl
    sub #c8
    jr nc,l8a45 ; (29 ... /> l8a5c: inc hl
    sub #c8
    jr nc,l8a9f ; (62 ... (l8ac5+1),hl
    sub #c8
    jr nc,l8b0a ; (57 ...
    robpearmain robpearmain November 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. …

    ...
    defb $08,$88,$48,$C8,$28,$A8,$68,$E8,$18 ...
    chev chev January 2007 Development
  • Thanos (improved BUGFIX)This is an improved BUGFIX for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0005221"]Thanos[/URL], please replace the "known errors" d…

    ... ; max column = 29
    6592 c8 ret z
    6593 34 ... ; min column = 0
    65e6 c8 ret z
    65e7 35 ...
    Einar Saukas Einar Saukas June 2011 Infoseek database
  • understanding machine codeHi Quick question. Am not really sure if it fits development forum as its not really development per se its more a learners question about developm…

    ...
    A7 AND A
    C8 RET Z
    D7 RST ...
    username username April 2014 Sinclair Miscellaneous
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... , composite modded it, swapped c5-c8 with 1uf multilayer ceramic caps ...
    retrogamemart retrogamemart September 2014 Hardware
  • Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…

    ... />
    D0 D4 7B 2A C8 A8 7B E2 CD 20 ...
    SkoolKid SkoolKid May 2016 Games
  • ZX Spectrum video waveformsAll work for this post was done on a ZX Spectrum issue 1 board (16k bytes of RAM only). This was what the Spectrum displayed on the TV screen: [i…

    ... TV screen:
    [img]https://c8.staticflickr.com/8/7761/29834294535_3dd743c4fd_o ...
    1024MAK 1024MAK September 2016 Hardware
  • Flood Fill IssueHi Folks, Came across the following Flood Fill routine by John Metcalf: [code]; scanline fill by John Metcalf ; call with d=x-coord, e=y-coo…

    ... EA
    ret z 60095 C8
    inc c 60096 0C ...
    Paddy Coleman Paddy Coleman August 2017 Development
  • Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…

    ... also underestimated the strength of C8 which I was leaning on ...
    Kamineko Kamineko September 2017 Hardware
  • New colour palette for Spectrum emulators, 16K/48K/+ machinesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ...
    18 CE 18
    C8 DC 2C
    2D 28 ...
    rga24 rga24 February 2018 Updates
  • New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ...
    18 CE 18
    C8 DC 2C
    2D 28 ...
    rga24 rga24 February 2018 Emulators
  • David DixonJust thinking about him as I was looking up some old clips of HGTG. I cannot help feeling that David Dixon (who played Ford Prefect in Hitchhikers Gu…

    ... .pinimg.com/originals/22/ad/c8/22adc83098ae6c5ae54afd034d6c899f.jpg[/img]
    dmsmith dmsmith March 2022 Chit chat
  • Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …

    ... ; Load zero flag.
    8007 C8 5 if condition is not ...
    Fraser Fraser July 2002 Sinclair Miscellaneous
  • Two Chess gameplay questionsI recently downloaded a Chess game for DOS, called Bobby Fischer teaches Chess (from [url="http://www.the-underdogs.org/game.php?gameid=2721"]http:…

    ... c7, white's move c7-c8=Q is a draw, but ...
    rfout rfout April 2005 Sinclair Miscellaneous
  • Chuckie Egg EditorsHi, Can anyone give me step-to-step instructions on how to get the Mercury Software Chuckie Egg Editor in the archive to work, using an emulator? […

    ...
    lift5 defb $F9,$54,$C8,$03 ;level5
    lift6 defb ...
    Mr. Anonymous Mr. Anonymous April 2006 Games
  • +3 soundhello there, just a quick-fire question today. i'm kinda keen on the idea of using my +3 quite a bit, particularly if i bother to to actually sort …

    ... cap's (c3, c4, c7, c8) are split into two groups ...
    Hungry Horace Hungry Horace July 2006 Hardware
  • +3 soundhello there, just a quick-fire question today. i'm kinda keen on the idea of using my +3 quite a bit, particularly if i bother to to actually sort …

    ... about C3,C4,C7 & C8 because they look very different ...
    Hungry Horace Hungry Horace July 2006 Hardware
  • +3 soundhello there, just a quick-fire question today. i'm kinda keen on the idea of using my +3 quite a bit, particularly if i bother to to actually sort …

    ... about C3,C4,C7 & C8 because they look very different ...
    KeepGood KeepGood July 2006 Hardware
  • Disassemblers and RSTsI think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020. Cheers

    ... /> ld a, (l_f9c8) ; f9fb 3a c8 f9 $0dts
    and $1f ... $0ats
    ret z ; fa06 c8 $0b/$05ts
    ld a ... $04ts
    ret z ; fa5f c8 $0b/$05ts
    jr l_fa3c ...
    jp jp April 2007 Development
  • Help hacking Split PersonalitiesI`ve been hacking away at Split Personalities for the purpose of putting new screens and graphics (items). The current screen is at 41187 and is 160…

    ... , $f7, $75, $71, $c4, $b2, $c8
    defb $ec, $fe, $0d ... , $bc
    defb $7b, $4d, $c8, $4c, $18, $75, $16, $55 ... , $cc, $df, $b1, $c5, $01, $c8
    defb $30, $f9, $23 ...
    FrankT FrankT July 2007 Games
  • New DivIDE Stock!I've just put some more DivIDEs up for sale on my site. Get in quick as we're doing limited numbers as usual. [url]http://www.papayalabs.co.uk/shop/…

    ... DivIDE 57c (resistor net and C8 is unused)
    [url]http ...
    velesoft velesoft August 2009 Sales
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... that go with them (C1~C8 and/or C55~C62 = next ...
    RetroTechie RetroTechie April 2010 Hardware
  • Case for DivIDEThis is my new case for the DivIDE. [IMG]http://zx-48k.npage.at/[/IMG][IMG]http://zx-48k.npage.at/divide_case_23764218.html[/IMG][IMG]http://www.wor…

    ... .com/1/2010/05/16/C8/71AEDE298A124A42AA5DA22D8AC5E669.jpg"]http://img.iwascoding ... .com/1/2010/05/16/C8/71AEDE298A124A42AA5DA22D8AC5E669.jpg[/URL]

    paines paines May 2010 Hardware
  • Merlin has risen from the grave!Those of you following the Merlin saga [thread=29902]over here[/thread] might be slightly interested to know that the program is now available in the…

    ... : b7 or a
    6be5: c8 ret z
    [/code]
    c8 ).
    Bandit Bandit June 2010 Games
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    [QUOTE=Jose_Leandro;449720]Please, can you tell me what mistakes you found ?[/QUOTE]

    Bad polarity on C8 and C2. The 4x1n4001 wrong polarity.R6 bad connected.
    Gods Gods June 2010 Hardware
  • After-Christmas mapsCavelon [url="http://maps.speccy.cz/map.php?id=Cavelon"]http://maps.speccy.cz/map.php?id=Cavelon[/url] Doombase [url="http://maps.speccy.cz/map.php?…

    [QUOTE=madmekon;207329]Just started working on a map on Metropolis (Power House)
    [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003155[/url]

    Can any one help me with the game?[/QUOTE]

    Need to write a bit of info. ...
    Bandit Bandit June 2010 Support files
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... -12v signal. The 4x1n4001 and C8, C2 was bad drawing.
    Jose_Leandro Jose_Leandro June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    The -12V supply is correct, no need to change, negative pin of C2, C8 have to connect -12V signal.
    For R6, middle pin (pin3) have to connect either pin 1 or pin 2.
    superfo superfo June 2010 Hardware
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... /> [code] DEFB $EE, $E1, $D4, $C8, $BD, $B2, $A8, $9F, $96 ... /> [code] DEFB $EE, $E1, $D4, $C8, $BD, $B2, $A8, $9F, $96 ...
    FrankT FrankT June 2010 Announcements
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