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<1…19202122232425…34>
  • checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…

    ... =roko;563447]
    [CODE]
    RST 48 ;MAKE_ROOM 00048
    [/CODE ...
    mattsteel mattsteel September 2011 Sinclair Basic
  • INSTR function...Hi Folks, Another little program that people might find useful: [CODE]100 DIM i(4) 110 LET a$="This is some sample text" 120 LET b$="text" 130 GO S…

    ... NZ,5b19
    5b17 cf RST #08
    5b18 02 DEFB ...
    mattsteel mattsteel September 2011 Sinclair Basic
  • User Defined GraphicsCan someone please give some very simple code for a displaying a UDG at a location on screen? Any assistance would be greatly appreciated. Sincerely…

    ... routine for printing chars (the rst 16 thing) just using the ...
    R-Tape R-Tape September 2011 Development
  • Structure of numeric arraysHi all, I have saved from my spectrum a numeric array using 'SAVE "array" DATA a()'. I now have the resulting file on my PC and I am trying to get …

    ... is a function of the RST $28 FP_CALC routine which pushes ...
    Battle Bunny Battle Bunny September 2011 Development
  • Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…

    ... :
    [CODE]LD A,'*'
    RST 10h
    RET[/CODE]
    csmith csmith September 2011 Development
  • Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…

    ... :
    [CODE]LD A,'*'
    RST 10h
    RET[/CODE]
    meow meow September 2011 Development
  • Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…

    ... /> 20 ld a,'*'
    30 rst #10
    40 ret
    Alcoholics Anonymous Alcoholics Anonymous September 2011 Development
  • Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…

    ... :
    [CODE]LD A,'*'
    RST 10h
    RET[/CODE]
    ZnorXman ZnorXman September 2011 Development
  • Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…

    ... ]
    [CODE]LD A,'*'
    RST 10h
    RET[/CODE]
    D7 | RST 10h | 215 - page 242
    ZnorXman ZnorXman September 2011 Development
  • 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…

    ... /> ret z ; so exit
    rst 16 ; print the character
    polomint polomint September 2011 Development
  • Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…

    ... text printing routine that used RST 16, with the ASCII code ...
    Zoltar Zoltar September 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?

    ... between accumulator and (HL).
    RST p Restart to location p ...
    Ralf Ralf October 2011 Development
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... the intervening operator. So perhaps RST $20 is used to scan ... stack the logical operator, call RST $28 and then call FP_TO_BC ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... stack the logical operator, call RST $28 and then call FP_TO_BC ...
    roko roko October 2011 Sinclair Basic
  • 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?

    ... . Almost exclusively this is a RST instruction which does increment R ...
    Alcoholics Anonymous Alcoholics Anonymous October 2011 Development
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... over +VAL"
    rst $20
    rst $20
    call ... SCANNG ;stack 1st variable
    rst $20 ;step over ,
    rst $20 ;step over operator
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... four lines:
    [code]
    rst $20
    call SCANNG ;stack ... 1st variable
    rst $20 ;step over ,
    call ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…

    ... ld sp,hl
    rst $20
    rst $20
    call $ ... ld (OPCODE),a
    rst $20
    rst $20
    call $ ... /> ld sp,hl
    rst 32 ;next char in line ...
    roko roko October 2011 Sinclair Basic
  • 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…

    ...
    jr z,DoXOR
    rst 8 ;If not, emit a ...
    mcleod_ideafix mcleod_ideafix October 2011 Sinclair Basic
  • FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…

    ... than the workspace and the RST 18h routine for allocating memory ...
    mcleod_ideafix mcleod_ideafix October 2011 Sinclair Basic
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    yep - I was doing that, but to no avail.

    I've replaced the RST call with a quick hand-rolled charplotter (which hopefully one day will evolve into a tile scroller) and it works just fine, so I'll investigate this at some other time.
    sack sack October 2011 Development
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... A
    RET Z
    RST 16
    INC HL
    rich_chandler rich_chandler 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…

    ...

    rst $20 ;step over +
    rst $20 ;step over ... /> push af

    rst $20 ;step over operator
    rst $20 ;step over ,
    ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... A
    RET Z
    RST 16
    INC HL
    sack sack October 2011 Development
  • 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…

    ... /> ret z ; so exit
    rst 16 ; print the character
    polomint polomint October 2011 Development
  • which zx-spectrum games uses 1bit sound samples?hi! I'm looking for zx-spectrum games using 1bit sound samples. Compairing with msx, which has far less games available than zx-spectrum, there are f…

    ... /> ld a,(23624)
    and 38h
    rrca
    rrca
    PrinceGaz PrinceGaz October 2011 Games
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... , (HL)
    RET Z
    RST 16
    INC HL
    TVzombie TVzombie October 2011 Development
  • Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…

    ... wrote my first game using RST 16 and udgs, so I ...
    R-Tape R-Tape November 2011 Development
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... afraid! I managed to use RST 16 quite well, but as ...
    Atari_Jetman Atari_Jetman November 2011 Development
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... of...basically just replaces the RST 16 command - I won't ... character just like PRINT....or RST 16)
    pop de
    Turkwel Turkwel November 2011 Development
<1…19202122232425…34>

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