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<1…15161718192021…34>
  • Saving and Loading from tape in MC?I'm actually having problems with saving and loading from the ROM routines for the interpreter... I'm currently using the following codes for saving…

    ... ; disable interrupts

    LD A,$0F ; make the border ... OUT ($FE),A ; output to port.

    LD HL,L053F ... OUT ($FE),A ; output to port.

    LD HL,$51 ...
    Dr BEEP Dr BEEP July 2011 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…

    ... ; ab06 dd e5 $0fts
    ld ($bc94), sp ; ab08 ed 73 ... 94 bc $14ts
    ld sp, $580c ; ab0c 31 0c ... 58 $0ats
    ld hl, $580c ; ab0f 21 0c ... $0bts
    cp $ff ; ab14 fe ff $07ts
    jp z ...
    jp jp July 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…

    ... B ; to range $00 - $17.
    L0E9E: LD D,A ; save ... ; allocated address plus one
    ld de, (0x5c4f) ; store system ... inc (hl) ; next row
    ld a, (hl)
    cp 24 ...
    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…

    ... this flag SCR2 stores $00 for Screen1 and $80 ... HL references AT_ROW address
    ld a, (hl) ; now A ... now DE = %010RR000rrrCCCCC
    ld a, (SCR2)
    add a ... , d
    ld d, a
    [/code ...
    Einar Saukas Einar Saukas August 2011 Development
  • Best way to read a key row?Hi All, I must confess that reading the keyboard is the bit I understand least about when coding, I've found some things that work for what I want t…

    ... /> [CODE]
    ld a, ROW
    in a, ($fe)
    cpl
    [CODE]
    ld a, $7f ; keyboard row port ... -SS-SPACE
    in a, ($fe)
    cpl
    and %00101 ...
    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…

    ... DE
    XOR A ;A = $00 for a header block
    LD DE,17 ;DE= number of ... /> PUSH IX
    CALL $0556 ;LD-BYTES load new program header ...
    Battle Bunny Battle Bunny August 2011 Games
  • machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…

    ...
    CALL $0556 ;LD-BYTES
    XOR A ;$00 for a header ... block
    LD DE,17 ;DE ... ,$43,$52,$24
    DEFB $00,$1B,$00,$40,$00,$80
    [/code]
    Battle Bunny Battle Bunny August 2011 Sinclair Miscellaneous
  • machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…

    ... ORG $5B00
    LD HL,BASIC
    LD (23641),HL ;E_LINE=address ... ORG $5B00
    LD HL,BASIC
    LD (23641),HL ;E_LINE= ... "16384"
    DEFB $0E,$00,$00,$01,$00,$00
    DEFM '"ds"'
    ...
    Battle Bunny Battle Bunny August 2011 Sinclair Miscellaneous
  • machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…

    ... ;23296
    LD HL,(23613) ;(ERR_SP)
    LD (HL),$EF
    LD HL,BASIC
    LD (23641),HL ; ... "16384"
    DEFB $0E,$00,$00,$01,$00,$00
    DEFM '"ds"'
    ...
    Battle Bunny Battle Bunny August 2011 Sinclair Miscellaneous
  • Kobrahsoft DB1 - doesn't work?Hi, I've tried loading [URL="http://www.worldofspectrum.org/infoseek.cgi?regexp=^DB1$&pub=^Kobrahsoft$&loadpics=3"]DB1 by Kobrahsoft[/URL] into two …

    ... D9
    LD DE, $1000 ; 801E 11 00 10
    LD BC, $0020 ... 80
    LD DE, $C000 ; 8028 11 00 C0
    LD BC, $1E3C ... ; 8036 D9
    LD HL, $0000 ; 8037 21 00 00
    ADD HL ...
    Battle Bunny Battle Bunny August 2011 Sinclair Miscellaneous
  • Kobrahsoft DB1 - doesn't work?Hi, I've tried loading [URL="http://www.worldofspectrum.org/infoseek.cgi?regexp=^DB1$&pub=^Kobrahsoft$&loadpics=3"]DB1 by Kobrahsoft[/URL] into two …

    ... -register will be set to $00 and the code will decrypt ... , set a break at $8BE2: LD SP,$8000; step through that ...
    Battle Bunny Battle Bunny August 2011 Sinclair Miscellaneous
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... /> I remember now what the ld , ZEXALL test fails when the ... /> FD DD 00 21 00 10 (NOP NOP NOP LD HL,1000h).
    zx81 zx81 August 2011 Emulators
  • Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…

    ...
    call print_message
    ld hl,key_right_port
    call get_defined_key ... />
    ; -----------------------------------------------
    delay: ld bc,32768
    ld a,0
    d_loop ... $fd ; A-G
    defb $fe ; CAPS-V

    ...
    polomint polomint 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 new version of my routine which now allows multiple saves and saving of variables; even so, it's about 80 bytes smaller than the original version (about 1kb). To save space the m/code is now in a DATA line instead of a separate variable. The first ...
    Battle Bunny Battle Bunny September 2011 Sinclair Basic
  • MCODE problem...Hi Folks, Trying to write a simple machine code program to hatch the screen. So far I have the following but even this is not working - it does not…

    ...
    21 40 00 033 064 000 LD HL,4000h
    06 ... 170 LD B,AAh
    11 01 00 017 001 000 LD DE ... ,100h
    70 112 LD (HL ... DEC DE
    7A 122 LD A,D
    B3 179 ...
    Paddy Coleman Paddy Coleman October 2011 Development
  • MCODE problem...Hi Folks, Trying to write a simple machine code program to hatch the screen. So far I have the following but even this is not working - it does not…

    ...
    21 00 40 033 000 064 LD HL,16384
    11 00 08 017 ... 000 008 LD DE,2048
    06 AA 006 170 LD B,AAh
    70 ... DE
    7A 122 LD A,D
    B3 ...
    BloodBaz BloodBaz October 2011 Development
  • MCODE problem...Hi Folks, Trying to write a simple machine code program to hatch the screen. So far I have the following but even this is not working - it does not…

    ... CODE
    21 00 40 033 000 064 LD HL,4000h
    LD B,AAh
    11 00 01 017 000 ... 001 LD DE,100h
    7A 122 LD A,D
    B3 179 ...
    Paddy Coleman Paddy Coleman October 2011 Development
  • Need help with tzxingI recently got a copy of this Polish text game: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0006622[/url] I can't make a tzx of it howeve…

    ... /> JP NC, $0000 ; C1F2 D2 00 00
    [/code]
    Ignoring the ... /> POP HL ; C22F E1
    LD HL, $7AF4 ; C230 21 F4 ...
    Battle Bunny Battle Bunny October 2011 MIA/STP/SDP
  • Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?

    ... /> ld hl,&57ff
    ld b,&fe
    exx
    ld hl ... ,&4000
    ld b ... ,&fe
    loop:
    ld c,(hl)
    ld a ...
    obo obo October 2011 Development
  • Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?

    ... /> ld hl,&57ff
    ld d,&fe
    exx
    ld hl ... ,&4000
    ld d ... ,&fe
    ld ...
    obo obo October 2011 Development
  • playing sound samples from Boriel's zxbasic-compilerfirst of all, sorry if it sounds confusing if i'm posting this thread here instead instead of at Discussions:SinclarBasic it's because this is more …

    ... /> ld l,a ; ( 4)
    ld a,$10 ; ( 7)
    out ($fe),a ... /> inc l ; ( 4)
    ld (hl),$fe ; (10)
    xor a ; ( 4 ...
    Alcoholics Anonymous Alcoholics Anonymous October 2011 Development
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... hl ;HL=runtime location
    ld de,LOCATE ;DE=assembled location ... af ;A =$00->$0E
    push bc
    ld hl,OPERATE ... ,$2F
    defb $A1,$00, $A9,$00, $B1,$00, $E6,$00, $CB,$87, $CB ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…

    ... ld bc,0
    ld a,$f7
    in a,($fe ... br /> ld a,$ef
    in a,($fe)
    ... ld bc,0
    ld a,$ef
    in a,($fe ... br /> ld a,$f7
    in a,($fe)
    ... -----------------------------------------------
    delay: ld bc,32768
    ld a,0
    ...
    polomint polomint October 2011 Development
  • Krakatoa not workingI can't get any of the Krakatoa files in the archive to load on spin or zxds. Anyone else had this problem?

    ... save counter1
    5B23 LD B,10 ;16 attempts to ... ;save counter2
    5B26 LD E,9F ;10011111 (159) ... br /> 5B2A CALL 05C5 ;LD-DEC+1, load bytes with ... overwrite ROM
    5B2D LD A,0C ;Border green?
    5B2F OUT (FE),A ;Set border
    ...
    lfaria lfaria October 2011 Games
  • New Game: 4k Tap-N-JoinJust finished my fourth and final entry into this years mini game competition. This one is in the 4k category and is called 4k Tap-N-Join. The game …

    ... very small as:

    ld a,%11101111 ; 7t - scan 67890 ... or sinclair
    in a,($FE) ; 7t
    cpl ; 4t
    TomD TomD November 2011 Brand new software
  • New Game: 4k Tap-N-JoinJust finished my fourth and final entry into this years mini game competition. This one is in the 4k category and is called 4k Tap-N-Join. The game …

    ... very small as:

    ld a,%11101111 ; 7t - scan 67890 ... or sinclair
    in a,($FE) ; 7t
    cpl ; 4t
    R-Tape R-Tape November 2011 Brand new software
<1…15161718192021…34>

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