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<1…16171819202122…34>
  • 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…

    ... 57 ;STMT_RET & (ERR_SP)
    LD SP, HL ; 249 ;from m ... GOSUB stack "00 3E"
    INC HL ; 35
    LD A, ( ... /> POP BC ; 193
    LD SP, HL ; 249
    PUSH ...
    Battle Bunny Battle Bunny November 2011 Sinclair Basic
  • Tr-Dos questionI hope that people who know Tr-Dos also read these forums :) Let's suppose that I have a .trd disk with an executable file. I want to make this fil…

    ... MRS: ;;
    ;; mrs2a80 1.00 convertor by Busy ;;
    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;< ... Switch to 48 basic
    ld hl,(ramtop) ;; Recontruction of ... for displaying error messages)
    ld (errsp),sp
    jp runbas ...
    velesoft velesoft November 2011 Development
  • Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…

    ... 8000h
    LD HL, MYCODE
    LD DE, 0C000h
    LD BC, 100h ... 21 0E 80 11 00 C0 01 00 01 ED B0 C3 ... 00 C0, followed by 16370 zero ... 21 0E 80 11 00 C0 01 00 01 ED B0 C3 ... 00 C0 C9 as it should ...
    John Elliott John Elliott November 2011 Development
  • Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…

    ... br /> ED 4B 00 5B rnd ld bc,(seed) ; ... COLOR="red"]ED 5B ?? ?? ld de,(seed+2) ; yw -& ... [/COLOR]
    ED 53 00 5B ld (seed),de ; x ... xor e
    41 ld b,c ; y = ... bc[/COLOR]
    06 00 ld b,0
    ...
    Paddy Coleman Paddy Coleman December 2011 Development
  • Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…

    ... 23296
    ED 4B 00 5B rnd ld bc,(seed) ; xz ... ; zt
    ED 53 00 5B ld (seed),de ; x = ... AB xor e
    41 ld b,c ; y = z ...
    4F ld c,a ; w = t< ... 2),bc
    06 00 ld b,0
    C9 ...
    Paddy Coleman Paddy Coleman December 2011 Development
  • Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…

    ... z = w
    123 7B ld a,e ; w = w ^ ... xor e
    065 41 ld b,c ; y = ... z
    079 4F ld c,a ; w = t< ...
    006 000 06 00 ld b,0
    201 ...
    Paddy Coleman Paddy Coleman December 2011 Development
  • Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …

    ... ;B =max_length
    ld ix,TOKENDATA
    ld (ix+0),0 ;reset ... counters
    ld hl,EXLIST
    ld b,0
    ld c,(ix ... been printed previously
    defb $00 ;bit 0 set if leading ...
    Battle Bunny Battle Bunny December 2011 Sinclair Basic
  • ANN: Tipshop updated Saturday, 31 December 2011Saturday 31 December 2011 The last update of the year - Happy New Year when it comes! * GoodBoy sent in a cheat for Wacky Races. * Hippy Smith sen…

    ... LD SP,$FFFF
    LD IX,$4000
    LD DE,$3F48
    LD ... :
    LD HL,$5E00
    LD DE,$9E00
    LD BC,$2000 ... as required
    LD DE,table
    LD BC,$9E00
    LD C,A
    LD A,B
    ADC A,$00
    LD ... B,A
    LD A,(BC)
    Jimmy Jimmy January 2012 Announcements
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... MRS: ;;
    ;; mrs2a80 1.00 convertor by Busy ;;
    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;< ... Switch to 48 basic
    ld hl,(ramtop) ;; Recontruction of ... for displaying error messages)
    ld (errsp),sp
    jp runbas ...
    velesoft velesoft January 2012 Games
  • Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…

    ... ]21 00 40 033 000 064 LD HL,$4000
    01 00 18 ... 001 000 024 LD BC ... ,$1800
    75 117 LD (HL ...
    36 78 054 120 LD (HL),$78
    01 02 ... FF 001 002 255 LD BC,$2FF
    ED ...
    Paddy Coleman Paddy Coleman January 2012 Sinclair Basic
  • Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…

    ... sp[/COLOR]
    31 00 5B ld sp,&5b00
    ... 21 78 78 ld hl,&7878 ; attr ...
    01 02 18 ld bc,&1802
    ... br /> 60 ld h,b
    68 ld l,b
    31 00 sp_save:ld sp,0
    FB ...
    Paddy Coleman Paddy Coleman January 2012 Sinclair Basic
  • Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…

    ... />
    [code]
    31 00 sp_save:ld sp,0
    [/code]

    [code]
    31 00 00 sp_save:ld sp,0
    [/code]
    rich_chandler rich_chandler January 2012 Sinclair Basic
  • Amazonia (BUGFIX)This is a bugfix for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027280"]Amazonia[/URL], please add the following "known errors" des…

    ... returning back to 0:00. Also the day of ... clock address
    9eca 3e3c ld a,3ch ; minutes overflow ... a
    9ec2 32c99b ld (9bc9h),a ; reset time ... address
    9ec8 3e3b ld a,3bh ; minutes maximize ...
    Einar Saukas Einar Saukas January 2012 Infoseek database
  • Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…

    ... the problem.
    [code]
    LD A, $7F ; 94E2 3E 7F ... FD
    IN A, ($FE) ; 94E6 DB FE
    [/code]
    On ...
    Battle Bunny Battle Bunny February 2012 Games
  • Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…

    ... br /> [code]
    LD A, $7F ; 94E2 ... /> IN A, ($FE) ; 94E6 DB FE
    [/code]
    RAM:7359 3E 7F ld a, 7Fh ; '' ; ... br /> RAM:735D DB FE in a, (0FEh)
    Korinel Korinel February 2012 Games
  • Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…

    ... FD
    IN A, ($FE) ; 94E6 DB FE
    [/code]

    [code]
    LD A, $7F ; 94E2 3E 7F ...
    Korinel Korinel February 2012 Games
  • Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…

    ... FD
    IN A, ($FE) ; 94E6 DB FE
    [/code]
    ... crash?
    [code]
    LD A, $7F ; 94E2 3E 7F ... /> ;
    org $d03e
    ld a, $f7 ; d03e 3e f7 ... /> ;
    org $ba9e
    ld a, $f7 ; ba9e 3e f7 ...
    jp jp February 2012 Games
  • Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…

    ...
    ;
    org $d03e
    ld a, $f7 ; d03e 3e f7 ... fd
    in a, ($fe) ; b5f9 db fe
    cpl ; b5fb 2f ...
    ;
    org $ba9e
    ld a, $f7 ; ba9e 3e f7 ... fd
    in a, ($fe) ; b75b db fe
    cpl ; b75d 2f ...
    Korinel Korinel February 2012 Games
  • The INPUT command routine ($2089)I was looking at the INPUT routine with a view to modifying the intro so that I could pre-load the workspace and edit an existing value, rather than …

    ... -VAR-4
    L2161: LD (IY+$22),$00 ; set K_CUR_hi to a ... that becomes apparent.

    LD BC,($5C82) ; fetch line and ...
    Geoff Geoff February 2012 Development
  • rotating HL left through CarryI've tried this several ways, and it works for a while, then a particular value has a bit set in an inconvenient place and it all goes to pot. Eg: "…

    ...
    [CODE]
    table DB $00, $10, $20, $30, $40, ... br /> [CODE]
    ld h, table/256
    ld b, 0
    ld a, l
    rlca< ... rlca
    rlca
    ld (hl), a
    djnz here ...
    antoniovillena antoniovillena March 2012 Development
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... testing. Game code read port #FE and data D7-D5 must ...
    SET 5,L
    LD H,0
    RET
    velesoft velesoft March 2012 Games
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... testing. Game code read port #FE and data D7-D5 must ...
    SET 5,L
    LD H,0
    RET
    Alessandro Grussu Alessandro Grussu March 2012 Games
  • Increasing the number of UDGs...Hi Folks, I know by default the Spectrum can have 21 UDGs (48K) and 19 (128K) and that the address of the bit patterns is pointed to by the UDG syst…

    ... : call $0d6b ;CLS
    ld a,$FE
    call $1601 ;CHAN_OPEN
    ld a,0
    call $0b03 ...
    Battle Bunny Battle Bunny March 2012 Sinclair Basic
  • Increasing the number of UDGs...Hi Folks, I know by default the Spectrum can have 21 UDGs (48K) and 19 (128K) and that the address of the bit patterns is pointed to by the UDG syst…

    ... ;PRINT_OUT controls
    ld de,UDG256 ;printing controls ... ;A =3
    ld h,0
    ex ... af,af'
    DOLOOP: ld a,(de)
    inc ... br /> NOLOOP: ld a,h ;A =UDG code $00-$FF
    ...
    Battle Bunny Battle Bunny March 2012 Sinclair Basic
  • Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …

    ... , i not use OUT [#FE],... to change the default value ... ,#20 ; set color
    LD C,A ; C = Detect ... read.
    IN A,[#FE]
    LD A,C
    CPL ... XOR A,#...
    LD C,A
    OUT [#FE],C
    ... diferent from RTFFAQ of port #FE description.

    Perhaps ...
    Z80user Z80user March 2012 Emulators
  • Hidden Spectrum emulator discovered in Goldeneye (N64)Commence ewgf's mind being blown in 3...2...1... [url]http://news.ycombinator.com/item?id=3770288[/url] [url]http://www.therwp.com/forums/showthread…

    ...
    3A.F35C LD A,(0x5CF3)
    57 LD D,A
    3E.F7 LD A,0xF7
    D3.FD OUT 0xFD,A
    DB.FE ...
    Zoinkity Zoinkity March 2012 Sinclair Miscellaneous
  • Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …

    ... EAR=1 pulse!"

    LD H,+40

    loop1 ... INC L
    IN A,(+FE)
    AND H
    JP ... INC L
    IN A,(+FE)
    AND H
    JP ...
    Z80user Z80user March 2012 Emulators
  • LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…

    ... find a block of data $00 in 8*8 pixels, and ... more dificult find $00 data in graphics read blocks ... />
    inchl INC H
    LD A,H
    OR A ...
    Z80user Z80user April 2012 Development
  • Adventurers: Your Help NeededHi All, I'm embarking on a feat which I am going to regret. Basically I will need the help of a host of volunteers with a passion for those old cla…

    ... af
    push ix
    ld ix,GRAPHICS
    NEXTPIC:
    ld e,(ix+00)
    ld d,(ix+01)
    ld a,$ff ...
    Battle Bunny Battle Bunny April 2012 Games
  • BUG in zxspin and SpecEmu - read Loading speed in WAV fileI'm created a new save, but it can run at 44.1 KHz, to test it, i make a new file from WAV 44.1 KHz to 88.2 KHz. Load this file in a emulator zx-spin…

    ... /> 2-. Standard ROM loading scheme (00)
    3-. Flash Load loading ... data read in IN A,($FE) are wrong.[QUOTE=Alcoholics Anonymous ... is
    loop IN A,($FE)
    ADD A,D or ...
    Z80user Z80user April 2012 Emulators
<1…16171819202122…34>

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