[CODE]
10 FOR y = 0 TO 23
20 FOR x = 0 TO 31
30 LET b = ATTR (y,x)
40 IF b>127 THEN LET b=b-127
50 IF b>63 THEN GOTO 80
60 IF y>21 THEN PRINT #0; AT y-22,x; PAPER 8; INK 8; BRIGHT 1; OVER 1; " "
70 IF y

... .mole and Matt_B's solution to use a Monte Carlo algorithm ... .
[code]
10 LET y=INT(RND*24)
20 ... LET x=INT(RND*32)
30 ... ;21 THEN PRINT #0;AT y-22,x; PAPER 8; INK 8 ... /> 40 IF y64 OR (ATTR(y,x)>127 AND ATTR ...

[code]
9 REM box to fill
10 LET boxposx= ... (y,x+1)>127 AND ATTR (y,x+1)64 OR (ATTR (y,x-1 ... )>127 AND ATTR (y,x-1 ... )64 OR (ATTR (y+1,x ... (y+1,x)64 OR (ATTR (y-1,x)>127 AND ATTR (y-1,x)

... be enhancements - a 640x480x8 screen with the adlib or ... />
New commands to handle sprites, much improved faster ... 256 colours, PRINTing to any position on the screen (as there will ... be no attribute squares to ...

... , posted by geoff.

To use Kempston Mouse from basic ... />
[code]
10 LET x = IN 64479
20 LET ... y = IN 65503
30 IF ... IN 64223 = 255 THEN PLOT x,y AND y

... />
for t = 0 to 1 step .01 /* or something ... * q1y

plot (x,y)
next t
[/code ... in a notebook somewhere) to eliminate all the multiplication by ... it became nice and easy to implement in Z80. The ... url] if you want to have a poke around.

... Well, it asked me to log in when I switched ... background doing, um, Steam-y stuff most of the time ... Hmm... funnily, it asked me to login too right before this ... that it doesn't manage to complete the login process. ... />

Death, Merry X-mas to you too!

... ): FOR y=1 TO 9: FOR x=1 TO 9: LET b$(y,x)=a$(y,x): NEXT x ... : NEX
T y
x=x-1: IF b$(y,x)=" " THEN LET b$(y,x)=s$( TO 2): LET ... $(y,x,2)
430 IF x$" " THEN LET y=VAL y$: LET …

... scroller SEU, with [b]x-axis ship command[/b] possibilities ... , which shoots in the y-axis and z-axis. ... oriented game, with [b]x, y and z-axis Crosshair and ... is they both wish to destroy the death star ... br />
Not enough to compare them, IMHO. :D[/QUOTE ...

... br />
DEF FN h$(x) = "0123456789ABCDEF"([B]1+[/B]INT ... to the perfect BASIC

DEF FN h$(x) = "0123456789ABCDEF"(.5+x ... /16)+"0123456789ABCDEF"(1+x-16*INT (x/16 ... round your value given to the position in the string

[QUOTE=Laser;176247]The x/y counters roll round in the 8-bit byte (...254,255,0,1...) effectively just representing accumulated delta mouse movements, not just absolute screen x/y co-ords, right?
[/QUOTE]

Yes, that's right.

... FN a(y,x)=16384+x+(y-INT (y/8)*8)*32+INT (y/8)*2048 ... /> Old age can do that to you [FONT=Times New Roman ...

... The interpretter has to search the program to find the DEF ... /> LET a$="16384+x+32*y+1792*INT (y/8)"
[/ ... code]

And then use VAL a$ to ... then you have to use the x,y vars all the time ... as opposed to DEF ...

... explosion triggered when the keys y-axis falls?[/quote]
... waiting for you to push it to that position. Without the ... br /> When it's ready to give you an item a ... random number is generated to choose which one it ... list. You therefore need to keep it out of ...

... misunderstood what you would like to do. The following routine allows ... you to move a cursor around that ... . This would allow you to keep all the original attributes ... /> 3130 POKE 22528+x+(y*32), (z-PEEK (22528+x+(y*32)))
3138 ...

... TO 4175

3175 POKE 22528+x+(y*32), (z-PEEK (22528+x+(y ... -PEEK (22528+x+a+((y+b)*32)))
3179 GO TO 3120
TO 3175

4175 POKE 22528+x+(y*32), (z-PEEK (22528+x+(y ... -PEEK (22528+x+a+((y+b)*32)))
4179 GO TO 4120[/spoiler ...

... /> I guess you'd have to ask Jonathan for the definitive ... 's just done that way to distinguish between loading two eight ... of the instruction which is to load the HL pair with ... />
[CODE]LD HL, 256*x+y[/CODE]

... s just done that way to distinguish between loading two ... the instruction which is to load the HL pair ...
[CODE]LD HL, 256*x+y[/CODE][/QUOTE]

Not ... that I want the code to be ROMable and reentrant. ... evens makes it easier to follow as in this ...

... FOR x=32768 TO 32827
50 READ y
60 POKE x,y
70 LET t=t+y
80 NEXT x
x=32768 TO 32832
50 READ y
60 POKE x,y
70 LET t=t+y

... the level data before going to screen.

[QUOTE= ... like to know how to edit the number, type and position of ... ) so it's better to work in hex. Use ... ? The 2nd to last byte points to another table which ... 858C and start a game to get the idea. Example ...

... the accumulator, it's better to use one of "rla", ... you do a And XX to clean the possible bits ... tricks, but I prefer now to finish my little "pong ... a little routine to get Video Adres from a x,y coordinate. I ... bit rotation (because I want to multiply by 256, I ...

... FOR x=32768 TO 32811
30 READ y
40 POKE x,y
50 LET t=t+y
60 NEXT x
to use the SAVE WHOLE option ... the menu which is used to create a stand-alone game ...

... 0, which makes it harder to spot the off by one ...

... FOR x=65024 TO 65046
60 READ y
70 POKE x,y
80 LET t=t+y
x=65047 TO 65535
120 READ y
130 IF y=999 ... 65024
140 POKE x,y
150 NEXT x
160 DATA ...

... /> FOR Y=1 TO COUNT: OVER 0: PLOT X(Y),64+(Y*2): NEXT Y:
FOR Z=0 TO 1 STEP ... 0: FOR Y=1 TO COUNT:
OVER 1: PLOT X(Y ... ),64+(Y*2):

... registers interrupt service routines to field x and y movement interrupts:
... , unlike the AMX, tracks (x,y) coordinates itself so a read ... hardware returns the (x,y) coord. Unfortunately the x wraps across 0 ... 0 or 255 and limits y to 192. I should also ...

... " , "x", "y" or "z" directory at all.

I was looking to ... directory from the
CD to my new PC when I ...

... /> The ULA knows which bytes to read at each time.[/QUOTE ... it converts the "real" TV screen position to the correct place in the ... Spectrum display file to get the bitmap and also ... calculates / reads the attributes to get the colours?

... converts the "real" TV screen position to the correct place in ... the Spectrum display file to get the bitmap and ... / reads the attributes to get the colours?[/QUOTE]< ... counts the memory location to read. Instead of bit ... away in memory compared to the first byte of ...

... it converts the "real" TV screen position to the correct place in the ... also calculates / reads the attributes to get the colours?
[/ ... an interlaced fashion -- in even screen refreshes it draws on even ... TV lines and on odd screen refreshes it drawn on odd ...