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Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…
... for an assembler, along with my own character and sprite print routines ... -
Basic program malfunctionHello. Please does anyone know why this basic program 10 LET x=0 20 LET x=x+0.1 30 print x 40 if x<>1 then goto 20 50 STOP does not properly work o…
... loop at line 20 to assembler and see what that's ... $(a):
NEXT a:
PRINT "start",n$(1),"step",n ... TO ): LET y$=x$:
PRINT AT 2,16;y$,: GO ... -
Demo of multidirectional scroll 50fpsHello!!! Im working with scrolls, and I want to show you a demo of a posible game. It works at 50fps and can manage about 7 sprites in the screen w…
... DE, POP BC for taking the grahic to print in the line ...
DE=tomb-grass
BC=grass-grass
If ... -
Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... THEN STOP
11 PRINT AT 0,15;d,: ... )
ld bc,10
add hl,bc
ld ... EXX
POP BC
PUSH BC
JR L_24DF< ... a
ld (23677),bc ;(COORDS)
bit 0 ... -
Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... d$="" THEN STOP
11 PRINT AT 0,15;VAL (CHR ... I do not have an assembler. :-)
[B]EDIT: [/B ... that back. Just tried the Assembler in BasinC and it works ... -
Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... d THEN STOP
11 PRINT AT 0,15;d,: POKE ... /> 20 PLOT 255,0: LET bc=-255=175+USR DOTS: REM ... /> 30 PLOT 255,175: LET bc=-255=-175+USR DOTS
40 PLOT 127,0: LET bc=0=175+USR DOTS
50 PLOT 0,87: LET bc=255=0+USR DOTS
LM ram block transfer routineHello! I need to transfer a block of 33000 bytes starting from address 28000 to a new start address, 31000, using a LM routine. Please, someone coul…
... ?
Are we talking assembler?
In that case ... /> LD DE,64000
LD BC,28000
[URL="http://z80 ...Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... /> ld de,22529
ld bc,767
ld (hl),a ... /> ld de,16385
ld bc,6143
ld (hl),l ... , different from ROM CLS routine, PRINT and PLOT coordinates aren't ...Block RoutineHi Folks, I want to draw a block on the screen dependent on providing the X,Y,W,H values. I came up with the following: [CODE]100 LET l$=" …
... READ a: IF az THEN PRINT "??": STOP
7006 RETURN < ... DEFADD)
LD BC,4
ADD HL,BC
LD D ... ,(HL)
LD BC,ERROR-1
ADD HL ... /> LD B,8
PUSH BC
PUSH HL
63068 ... br /> POP HL
POP BC
INC H
...Block RoutineHi Folks, I want to draw a block on the screen dependent on providing the X,Y,W,H values. I came up with the following: [CODE]100 LET l$=" …
... addressing the parameters simplifies the assembler code. The original routine needed ...analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... )+256*PEEK (a+2)):
PRINT CHR$ b0;")" AND b0=40 ... : GO TO 8942
8946 PRINT CHR$ b0;: LET a=a ... /> ld b,(hl)
inc bc
ld a,b
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... by others in assembler, used by others in assembler? As I know ... text. All other, including text print and sprite output - is modified ...ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... does not work in assembler. This is an assembler-level feature -- it ... a name. eg, "ld ix,print; jp (ix)" is enough for ... the linker to attach "print".
I may have ... references left unresolved by the assembler (the "object file"). All the ...ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... hl,RoutStart
add hl,bc
push hl
ret ... a real game in real assembler in full using sp1/churrera ... for me).
So, assembler coders, anyone? As C/Java ...Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…
... /> [B]ld bc,eostr-string ; length of string to print[/B]
it becomes:
[B]ld bc ... eventually
[B]
ld bc,4[/B]
If ... will find there this "ld bc,4". All mentioned calculations were ...ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... hl,RoutStart
add hl,bc
push hl
... understand and portable to any assembler. But if I were ... a real game in real assembler in full using sp1/ ... :)
[quote]
So, assembler coders, anyone? As C/Java ...Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…
... . Putting this change into the assembler version should be quite zippy ... /> 13 LET gen=gen+1: PRINT AT 0,0;"Generation:";gen ... /> FOR i=1 TO 20: PRINT g$(i): NEXT i:
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
Run with "PRINT AT 1,0;"" AND USR ... /> ld de,dat2
ld bc,32
call $203C ;PR_STRING ... /> ld de,dat2
ld bc,datz-dat2-1
ldir ...Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
never never never print one letter.
scroll looks ...
call scroll
ld bc,$7FFE;spacebar test
in ... /> add hl,hl
ld bc,$3C00;ROM font
add ... hl,bc
ex de,hl
Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…
... PAPER 1 to the second PRINT.
[*]line 23: Deleted ... /> 11 RANDOMIZE 0: LET bc=USR InitS:
BORDER 1 ... 1 TO 20: LET bc=den=((i-1)*32)+USR ... 14 LET gen=gen+1: PRINT AT 0,0;"Generation: ";gen ... 'p$:
LET bc=USR GenPG: IF INKEY$=" " ...Making noises with the AYHow do you go about making noises from the AY chip in machine code? I'm wanting to make a pulsating humming noise that increases in volume as you ge…
... the following code into the assembler, and click assemble
pulsevolloop PUSH BC
LD BC,65533
OUT ... to next channel
POP BC
DJNZ pulsevolloop
clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…
... are normally 0
ld bc,25
ldir
ld ... FOR r=0 TO 23: PRINT "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@": NEXT r
30 RANDOMIZE ...clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…
... normally 0
ld bc,25
ldir
PRINT "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@": NEXT r
... with zeroes
ld bc,32 ; dist to next ... />
add hl,bc ; next pixel line or attrib ...clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…
... 's OK but trying to PRINT AT a specific position on ... a character-based rectangle
; PRINT AT row,col;: RANDOMIZE cols ... +256*rows: LET bc=USR ClearWindow
; row,col ... =rows
ld b,0 ;BC never exceeds 32, so B ...Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…
... : PAPER 0: INK 0: CLS : PRINT BRIGHT 1; INK 7;AT ... , 10; INVERSE 1;"PLEASE WAIT": PRINT AT 0,0: LOAD ""CODE ... the easy bit!... the Alkatraz Assembler is next, so... more to ...Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…
... fe ff $0ats
ld bc, $9a6f ; 5b06 01 6f 9a ... written (we do get an assembler thrown in!), assembled and the ...
