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<1…14151617181920…34>
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... /> execute db 195,0,0 ; jp 0


    ;---------------------------------------------------------------------------< ... ,b
    db 40,00Ch ; jr z,.copy

    ; ------------
    < ... db 0,0,0 ; retn / jp nn


    ; ...
    ASM ASM November 2010 Announcements
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... /> execute db 195,0,0 ; jp 0


    ;---------------------------------------------------------------------------< ... db 0,0,0 ; retn / jp nn


    ... a ; Set for loop
    jr z,.256 ; 0 = special 256 BYTE ...
    ASM ASM November 2010 Announcements
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... jp nz,scr ; Use JP as it's faster than JR
    jp nz,atr ; Use JP as it's faster than JR
    jr z,no_left
    dec (ix+ ... cp a,SCRWTH-SPRWTH
    jr z,no_right
    inc (ix+ ... cp a,SCRHGT-SPRHGT
    jr z,no_down
    inc (ix+ ...
    sekrets sekrets November 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... jp nz,scr ; Use JP as it's faster than JR< ... jp nz,atr ; Use JP as it's faster than JR< ... br /> cp 0
    jr z,no_left
    dec (ix ... cp SCRWTH-SPRWTH
    jr z,no_right
    inc (ix+ ... cp SCRHGT-SPRHGT
    jr z,no_down
    inc (ix+ ...
    ASM ASM November 2010 Development
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... br /> di ; disable interrupts
    jp init ; init

    ... ; rst 0x38 = executive
    jp executive

    .org ... br /> halt: halt ; halt
    jr halt

    executive: ei ... br /> sub c
    jr z, end ; if l=c goto ...
    tstih tstih January 2011 Development
  • Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…

    ...
    call delete
    jp keys
    draw ld b ... br /> cp 192
    jr z,offdn
    here ld hl ... )
    cp 30
    jr z,offrght
    ld a,(count ... )
    cp 8
    jr z,icount
    ld hl,count ... )
    cp 0
    jr z,offleft
    ld hl,column ...
    R-Tape R-Tape February 2011 Development
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ... is
    sub 165 ;+
    jp 0x0c10 ;+ exit via PO_TOKENS
    cp 169 ; printed.
    jp nc, err5 ;
    call fitcq ... no rotation is required
    jr z, putit ;

    pop ... (s_posn) ;
    cp 0 ;
    jr z, pst ;
    inc de ;
    chev chev April 2011 Sinclair Basic
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ... br /> ex de,hl
    jp m_room

    org ... :
    cp $fe
    jr z,getcol
    ld a,b ... crchk:
    cp $0d
    jr z,do_cr
    call pr_80
    cp $18
    jr z,wrap

    zend ... /> ld de,df_2+1
    jp cls2

    org ...
    chev chev April 2011 Sinclair Basic
  • Your Views on... GhostbustersI dusted off the Master System version of this and inspired me to try out the Speccy version. It's a good game with it's strong and weak points. I …

    ... ,C
    CP $00
    JR Z,DONE
    LD A,$01 ...
    LD (BC),A
    JR MODIFY2

    ORG ADDRS ...

    DEC A
    JR NZ,ADDRS
    LD BC ... HL
    DJNZ DONE2
    JP $8300 ;fast loader jumps to ...
    Jimmy Jimmy May 2011 Games
  • Your Views on... GhostbustersI dusted off the Master System version of this and inspired me to try out the Speccy version. It's a good game with it's strong and weak points. I …

    ... ,C
    CP $00
    JR Z,DONE
    LD A,$90 ...
    LD (BC),A
    JR MODIFY2

    ORG ADDRS ...

    DEC A
    JR NZ,ADDRS
    LD BC ...
    LD SP,$FFFF
    JP $8300 ;fast loader jumps to ...
    Jimmy Jimmy May 2011 Games
  • Your Views on... GhostbustersI dusted off the Master System version of this and inspired me to try out the Speccy version. It's a good game with it's strong and weak points. I …

    ... ,C
    CP $00
    JR Z,DONE
    LD A,$01 ...
    LD (BC),A
    JR MODIFY2

    ORG ADDRS ...

    DEC A
    JR NZ,ADDRS
    LD BC ... HL
    DJNZ DONE2
    JP $8300 ;fast loader jumps to ...
    jp jp May 2011 Games
  • 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…

    [QUOTE=RST#08;534345]Edit: You can use "JR" instead of "JP", too.[/QUOTE]

    And RET Z right after the test.

    Patrik
    Patrik Rak Patrik Rak May 2011 Development
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... 63860 245 save flags
    JR Z, npatch ; 63861 40 18 no ... 63873 33 139 249
    JR Z, cpatch ; 63876 40 1 ... Disable right justification
    JP nonspc ; 63884 195 80 ...
    Battle Bunny Battle Bunny May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... AT then fetch
    jr z, getyp ; the X ... /> sub 165 ;
    jp 0x0c10 ; exit via PO_TOKENS
    jr z, putit ;
    pop bc ... a ; was cp 0
    jr z, pst ;

    ... ;
    and 31 ;
    jr z, pst ;
    ld a, ( ...
    chev chev May 2011 Sinclair Basic
  • CrusoeI'm making slow progress in mapping & debugging this game, having to restart several times due to various unfortunate events. The latest was getting …

    ... script to check all the JP, JR, DJNZ & CALL commands ... org $B6F8 ; jump correction
    JR Z, $B71D ; B6F8 28 23
    JR Z, $B71D ; B705 28 16
    Battle Bunny Battle Bunny June 2011 Games
  • CrusoeI'm making slow progress in mapping & debugging this game, having to restart several times due to various unfortunate events. The latest was getting …

    ... 6BEC ; jump correction
    JP $6A2D ; 6BEC C3 2D ... $B6F8 ; jump correction
    JR Z, $B71D ; B6F8 28 23< ... RET address before JP back
    JP PATCH ; 84F2 ...
    Battle Bunny Battle Bunny June 2011 Games
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... value by decrementing it
    jp m, CHK_AT ; expecting a ... ; specified keyword 'AT'?
    jr nz, CHK_CR ; continue otherwise
    jr z, NEXT_ROW ; change row if so ...
    Einar Saukas Einar Saukas July 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... value by decrementing it
    jp m, CHK_AT ; expecting a ... ; specified keyword 'AT'?
    jr nz, CHK_CR ; continue otherwise
    jr z, NEXT_ROW ; change row if so ...
    Einar Saukas Einar Saukas July 2011 Development
  • Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …

    ... cpi ; a-(HL)
    jr z, .found
    ret po< ... teste[/B]
    [B] jp .found ; teste.found[/B]< ... ret po
    [B] jr nz, .search [/B]
    ... teste[/B]
    [B] jp .found ; teste.found[/B]< ...
    Einar Saukas Einar Saukas July 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... value by decrementing it
    jp m, CHK_AT ; expecting a ... ; specified keyword 'AT'?
    jr nz, CHK_CR ; continue otherwise
    jr z, NEXT_ROW ; change row if so ...
    Einar Saukas Einar Saukas August 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... value by decrementing it
    jp m, CHK_AT ; expecting a ... ; specified keyword 'AT'?
    jr nz, CHK_CR ; continue otherwise
    jr z, NEXT_ROW ; change row if so ...
    Einar Saukas Einar Saukas August 2011 Development
  • Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…

    ... a, (c)
    ROM:0497 jp m, loc_492
    ;loops while ... dec l
    ROM:049B jr z, loc_4A8
    ROM:049D rra ... a, (c)
    ROM:04A0 jp p, loc_49A
    ;loops while ...
    mcleod_ideafix mcleod_ideafix August 2011 Hardware
  • Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…

    ... and monostable
    ROM:0497 jp m, WaitFor0 ;loops while ... dec l
    ROM:049B jr z, TotalExit
    ROM:049D ... and monostable
    ROM:04A0 jp p, WaitFor1 ;loops while ...
    mcleod_ideafix mcleod_ideafix August 2011 Hardware
  • automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …

    ... /> rst $18
    cp ","
    jr z,GETARG
    call FPTOBC ;BC ... bc
    pop hl
    jp (hl) ;JP addr
    [/code]
    Battle Bunny Battle Bunny August 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... by decrementing it
    jp m, CHK_AT ; expecting a ... specified carriage return?
    jr z, NEXT_ROW ; change row if ... 0x06 ; specified comma?
    ; jr nz, DRIVER ; continue otherwise
    Einar Saukas Einar Saukas August 2011 Development
  • Casstte 50 compilation emulator game questionHi - Hope this is the right place to put this question? Wasn't sure? But I have just downloaded the 'Cassette 50' compilation from wos but can't w…

    ... +$0E)
    AND $C0
    JR Z,SKIPIT ;jump if LINE already ... DE, HL ;HL= PROG
    JP $0808 ;LD-CONTRL
    [/code ...
    Battle Bunny Battle Bunny August 2011 Games
  • Bug fixing woesGaahhhh! I've spent an afternoon off work agonizing over why my routine didn't work. It's something I'd already restarted so didn't want to wipe th…

    ... 0,(ix+0)
    jr z,mm1
    set 7,( ... 1,(ix+0)
    jr z,mm2
    set 6,( ... 2,(ix+0)
    jr z,mm3
    set 5,( ... 3,(ix+0)
    jr z,mm4
    set 4,( ... /> ld a,c
    jp nz,mml2
    ld hl ... ready for next time
    jp sprd[/CODE]

    ...
    R-Tape R-Tape September 2011 Development
  • line, plot and circle in whole 256x192 displayhi! are there some way to draw lines, or whatever, in the whole 256x192 display, than just the above 256x176 part? (this is the msx1 version i made o…

    ... /> CP 77 ;"M" = move
    JR Z,plo1
    CP 68 ;"D ... x A=distance
    JR NC,dod1 ;jp if positive dir
    JR NC,dod2 ;jp if positive
    DEC ...
    roko roko September 2011 Sinclair Basic
  • a bit of coding helphi all over the past few weeks i have been busy getting to grips with recracking tr-dos stuff for the plus-d and was after a little bit of help what…

    ...
    sbc hl,bc
    jr z,found
    pop de
    inc hl
    jr nc,fnext
    notfnd ret ... )
    ld l,a
    jp (hl)
    table defw 1802 ...
    Dr BEEP Dr BEEP October 2011 Development
  • a bit of coding helphi all over the past few weeks i have been busy getting to grips with recracking tr-dos stuff for the plus-d and was after a little bit of help what…

    ... ,h
    or l
    jr z,aloop2
    sbc hl,de ...
    jr nz,aloop1
    aloop2 ld ... /> ld h,(ix-1)
    jp (hl)
    ;
    atable dw ...
    Turkwel Turkwel October 2011 Development
<1…14151617181920…34>

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