-
smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…
... out, although "erase old : calculate new : print new" is the ... x=horizontal and y=vertical, so if using x & y in PRINT position ... from BASin). Note that I've swapped all x/y names to use x ... from FRAMES at start/restart and the difference used to calculate ... -
Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…
... X-position you get a number from 0-255. If you read the Y-position ... you also get a number from 0-255 ... positions for calculate new relative values, and for true position are used ... -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... the same, is the print position only specifiable to character spaces ... />
[CODE]PRINT #4;AT y,x;"FZX"[/CODE]
In ... , [B]y[/B] is the vertical coordinate (pixel line from 0 to ... and [B]x[/B] is the horizontal coordinate (pixel column from 0 to ... -
Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... /> that DISCiPLE has a 'natural x,y' [URL="http://www.biehold.nl ... only adjust the mouse position by one pixel every 1/50s. So ... the last position read from the hardware, subtracting that from the current position to ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... Z80 code with per-pixel colour, hardware sprites or ... back into the right position. Since that's usually ... scroll only from X line to Y line (with X and Y configurable), ... incredible simple, just delay X pixels the sync pulse ... reduce the size from 32 to 31 columns. -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... if each card was a pixel and you had 49, ... one byte for each bit position within each cell. Although ... are needed for the bit position, so we could get ... would be easy to determine x,y from the bit's place ... happens once that pixel/card is removed from the list/pack ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... a sequence of numbers from 0 to 65535 without ... have to find explicit X and Y coords followed by a ... to a display address and pixel position (within a byte) directly. ... C & 7 = bit position 0-7 within byte. C ... it, perhaps subtract 1 from the 16-bit value ... -
Books that you just can't quit.Much as parts of the presentation,writing style infurates me, there is a book I just keep comming back to again and again. Its like the Yang to the …
... worm, five segments long from row R collum CHR$
from screen and update score line.
1190 PRINT AT Y,X ... and moving it to the from.
3009 REM if ... it at it's old position.
3010 IF R ... ;" "
3019 REM calculate new position of worms head.
... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... rotate
rrca ; into position
jr co_change ; set ... ld (hl), a ; write pixel byte
jp po_attr ; ... c, (hl) ; get character from font
sla c ; ... /> fdel ; x, y, z * sin(pi/A)
fsub ; x, y - z ... -
ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…
... for "User Grid"... The X & Y values could perhaps be defined ... , then move that into position and repeat the process many ... , it allows drawing using pixel data only without attributes, ... attribute data from the clipboard selection without the pixel data, and ... -
ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…
... "User Grid"... The X & Y values could perhaps be defined ... then move that into position and repeat the process many ... attribute data from the clipboard selection without the pixel data, and ... often occurring invertions on 8x8 pixel patterns....
... -
Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…
... :
LET bit=x-8*INT (x/8)+1:
LET ... strings from "00000000" to "11111111". 'bit' is the pixel position within ... the addressed byte. The first two statements convert the x,y ... , in which case the 'y' range becomes 0 to 191 ... -
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…
... TASM assembler.
;*
;* Derived from my MC-10 6803 code ... ;flag should still be set from cmp
clsexit:
... print at pixel X,Y but
;* prints at a character position.
;**************************************************< ... -
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... starting at a different SEED position the pixel coords table gets rearranged ... /> XS: defb 0 ;top left x,y, width, height
YS: defb ... #
rst $28 ;FP_CALC calculate R mod U
defb ... -
Flood Fill IssueHi Folks, Came across the following Flood Fill routine by John Metcalf: [code]; scanline fill by John Metcalf ; call with d=x-coord, e=y-coo…
...
; call with d=x-coord, e=y-coord
; set ... ;60006 E5
; calculate bit position of pixel
EA67: nextrun ... -
Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…
... 982965"][quote="Luny;982951"]From a developers point of view ... row using a 256/512 pixel width (or 32/64 ... calculate.
[/quote]
but you must admit
x + ( y ... less opcodes), than
x + (y * 320)
however ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; look up screen address from the table
ld c ... ; next pixel row data
; get the next address from the table ... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; look up screen address from the table
ld a ... ; next pixel row data
; get the next address from the table ... x, y position
; hl = pointer to 8 bytes graphic data
; b = pixel y ... -
AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
... , start playing an instrument from an offset (also implictly ... loop, 8000 basically repeats from the start, other values ... /> Stream 2byte - the current position of the stream
Volume ... - depth
Arpeggio 1byte - x+y semitones
Vibrato and Arpeggio ... -
Print at 128,87? :)The advanced search function didn't help me find the answer to this, and I don't remember seeing anything similar in magazines or books... so please …
... a character or UDG from BASIC but using pixel coordinates?
x, y (not y,x like the regular AT ... such routine would limit x to 248 and y to 184 to ... -
42 colums in screen, in anywherethe routine write in anywhere of the screen, it can start to write in 32X24 position and write from it in 42 colums, it is utility to have border wit…
... to write in 32X24 position and write from it in 42 colums ... collect many routines to convert X,Y coordenates in addres of spectrum ... -
Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
... routine that will take an X,Y coordinate in pixels, and find ... /> ld a, (ix+SPR_ypos) ; get y position.
sra a ; --------------
from the level.
[/code ... -
SpecBAS 0.730 Now available!Well, I felt I should release SpecBAS as it is right now - my new son has been born (this one survived! \o/ ) and when he comes home I'll have very l…
... GRAPHIC gfx$|bankID|DEFAULT [POINT x,y] sets a graphic (as a ... the hotspot with the POINT x,y parameter. This is the first ... -
What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…
... .
dec (hl) ; subtract 1 from y coordinate.
ret
dec (hl) ; subtract 1 from x coordinate.
ret
x and y coordinates for the player's gunbase position,
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... ld a,(characterno) ; getscharater from charterno variable
sub 32 ... y=0 to 21
coordslookup ; lookuptable for printing x position. ... LSB xx111111 = character position MSB 11xxxxxx = ...ZX-Paintbrush version 2.2.9 releasedDear forum readers and ZX-Spectrum emulator friends, today I released ZX-Paintbrush version 2.2.9 with interesting new features (small ones but I th…
... [LIST]The tool icon "Adjust position to attribute limits" now allows ... have a non-attribute-compatible x/y-position.[/LIST]
[LIST]The ... ", which helps importing multiple blocks from one file. Shortcut is . ... 16 to get a range from -15 .. 175 on SCREEN ...BIFROST* Advanced Programming - part 6The purpose of this demo is somewhat different from previous ones. Instead of teaching a new technique, the main goal here is to demonstrate how much…
... this demo is somewhat different from previous ones. Instead of teaching ... MAX(x, y) ((x) > (y) ? (x) : (y))
int linPlayer; // hi-res vertical tile position ...Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…
... attributes and not as a pixel / line representation.[/FONT][/SIZE ... drawn based on the previous position. For example, if I ... ; X position[/FONT][/SIZE]
[SIZE=3][FONT=Calibri]0 ; Y Position[/FONT ... collision detection based to the X,Y and Width & Height ...
