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(Somewhat OT) Circular regression analysisI'd like to be able to regenerate the "Tunnel" image from [I]Jumbly[/I] (that's why this post is only "somewhat" off-topic), but to do so I need to b…
... /> 2xa + 2yb + c = x^2 + y^2
where c = r ... ,yn) that we want to fit to a circle, an overdetermined ... all the numbers using your (x,y) data points -- the only ... a,b,c.
To find the best fit in ... shouldn't be too bad to implement.
(a, ... -
Sprite DesignerDoes anybody know of a good sprite-designer package? The game I'm currently working on is requireing a lot of sprites, and coding them all as binary…
... I really need is to be able to design a 16x16 sprite ... it interleaves mask, graphic and X,Y order is completely customizable. It ... -
Lesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…
I know that port 254 controls the loudspeaker among other things. Are there any advantages to using OUT x,y over BEEP? How would that be achieved?
Necros. -
Method to read byte as binary string rather than dec?Hi all Am fiddling around with the screen buffer and have written a routine to scan the screenbuffer into upper ram and then write it back in upside…
... the screen buffer and have written a routine to scan ... /> But this will make your screen negative.
... what exactly you want to do - let's ... screen position 1,1 and you would like to 'move' it to ... 3 (for three different screen sections, STEP 32, for ... -
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... /> will be quickly copied to the screen
display once it ... pattern that is
drawn to screen where the sprite
... sprite has been traversed to
get to one pixel row ... is 'X', the interrupt will jump to address X*256+X and that ... -
RealSpec start upI understand that you can add a start-up line to initiate the version, mode,interface etc; for RealSpectrum but I'm a complete ham with emulators, a…
... from the command-line to override whatever's in ... -pentagon -scorpion
-videomode X Y : set video resolution
- ... /> -writesound : enable sound recording to WAV
-multiface : enable ... -
Code sheetsI sure most speccy owners spent an hour or so copying the code sheet to jet set willy at the back of the classroom, but did anyone ever copy the shee…
... the codes stored in memory to compare against, or just pick ... a small selection to choose from (or use some ... algorythm to calculate what a code should be based on the x,y ... take up loads of memory to store all those codes, but ... -
Code sheetsI sure most speccy owners spent an hour or so copying the code sheet to jet set willy at the back of the classroom, but did anyone ever copy the shee…
... the codes stored in memory to compare against, or just pick ... a small selection to choose from (or use some ... algorythm to calculate what a code should be based on the x,y ... -
Amazing Short Type-InsHey all ! Been having some pretty stressfull days lately so I tought I would type in some games. There was a very nice type-in book here in Slovenia…
... *20)+1: FOR f=1 TO 10: LET a((f*9 ...
80 FOR f=1 TO 100: IF a(f)=0 ... 've done, press any key to see a table of symbols ... and remember the symbol next to it."''"BASin will read your ... /> 140 PRINT : FOR f=1 TO 17
150 IF f -
Has this been done before?Are there any emulators whose speed can be adjusted by the Spectrum program that the emulator itself is running? So that, say the Spectrum program ca…
... it by pressing ctrl+Y to get to the option screen, and slide the ... bar on the bottom of the window to ... the right in order to multiply the Z80 ... ?:razz:
But mines looks to me more complete, expecially because ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... move NR type sprites to any pixel position but they will appear ... initially moved to the same position at the centre of the screen. As ... the first sprite is allowed to move (its ... 10 sprites must be drawn to screen and that is the cause ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... struct corresponding to (0,0) can be mapped to screen coordinate ( ... [sel1], INK_BLACK | PAPER_WHITE, 'X', SP1_RFLAG_COLOUR);
sp1_ClearRectInv(& ... (&sq[sel1], INK_BLACK | PAPER_YELLOW, 'X', SP1_RFLAG_COLOUR);
}
Lesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…
... y=0 TO 8 STEP 2
90 PRINT AT (8-y)/2,x ... *POINT (x,y)+4*POINT (x+1,y)+2*POINT (x,y+1)+POINT (x+1,y+1 ... ))
100 NEXT y ...
110 NEXT x
120 PAUSE 0
130 GO TO ...PsPectrum 1.0.4 has been released.Hi, Only wanted to let you know that I have released a new version of PsPectrum with a nice bunch of additions (AY-3 sound, savestates, border emula…
... very very saying X won't abuse Y's good favour ... does so. So X has to be made to comply every bit as ... like anyone will be able to stop them.... regardless of ... his own and thus advantageous to be used in pspeccy.< ... on before.... if someone wants to, they'll do it ...Is Sabre Wulf a good game?Because i've never played it but i have the original cassette so is it worth booting up, or is it one of those games that's almost impossible to fini…
... wait for the creatures to move to a position where they were either ... in the niche on the screen to the left, or held down ... best route through a screen, the path to an extra life item ... vertical path, indeed - how to navigate a screen-high vertical path without ...Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…
... /> [code]x = x - y>>n /* for some constant n */
y = y + x> ... the radius), but too good to go without a mention :)Playing Denied Ultimate GamesHmmm, maybe this belongs in Emulators but it is game specific. Just been leafing through Games(TM) in Smiths and there's an article about a (strong)…
... I’m responding to your recent letter addressed to Chris Stamper ... questions please don’t hesitate to contact me.[/QUOTE]
... employee, who
wishes to remain anonymous. In it, he ... )?
Mr X: Neither!! - On screen it looked more like ...Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…
... 128k pages to store the result of X * sin(Y) where Y (0..255 ... ) maps to higher byte and X maps to ... lower byte of the lookup address. Ideally, the X * Y ... mentioned earlier). X * cos(Y) is the same as X * sin(Y + 64). ...Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... [*]Only draw character cells on screen that change
[*]Scene ... sprites and background) is copied to screen. A big advantage is ... so that the entire screen does not have to be rendered.
to allow x sprites to possess a 3d ...Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... , would you care to tell us the X,Y,Z coordinates of the ... same coordinates, and allow them to cross tile boundaries...)Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... [*]Only draw character cells on screen that change
[*]Scene ... sprites and background) is copied to screen. A big advantage is ... so that the entire screen does not have to be rendered.
to allow x sprites to possess a 3d ...Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... planes (a z-order) to screen objects which can be ... I draw a character cell to screen, everything in that char ... instead of the whole screen. The z-order of ... objects on screen will not move so their position in ... for an on-grid position is still ok, but ...LoC question (again)- sorry!Hey guys, I posted this question a couple of days ago- sorry to repeat, but just wondered if anyone could help (perhaps someone who didn't read my la…
... totally completed it (I seem to remember, on one ignominious ... - the way you had to carefully position your soldiers at the start ... to minimise the possibility of ... bottom of the screen forever and you'd have to reset the ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... /> I read something about Spectrum screen driver? How do I use ... two-digit value following a "\x" must be in hexadecimal. So ... " you'll gain access to up to 85 column ansi-mode capability ... printing is not done directly to screen and will only appear with ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... comments
I have to agree that this kind of ... point you don't have to calculate you'd probably ... and the lines are guaranteed to meet. If the average ... . Since calculations have to be for x, y and the Z axis ... where you could draw to one buffer and then ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... faster to POKE the new X,Y coordinates or sprite frame than to do ... thing I'd like to see added to the old 8 bits ... address space or external RAM to hold graphics or sound data ... too late onto the market to benefit much from that; something ...Byter and U.F.O. by Protek?Who says these are available for the Speccy? I've often wondered where this info comes from - any info I've seen shows these as available for the ZX-…
... collection and I have game X, Y and Z on tape. I ... I'm not going to loan them to the preservation team, or ... myself, because I have nothing to gain out of it.[/quote ...Font centering problemA while back today, I started coding a simple Othello/Reversi game in BASIC, with the precious aid of BASin (great tool, hope it eventually becomes b…
... /> 20 FOR x=1 TO 6
30 FOR y=1 TO 6
39 REM *** copy dots ***
40 IF POINT (x,y ... ) THEN PLOT x+pos1,y+pos2: GO TO 50
44 ... POINT (x+pos1,y+pos2) THEN OVER 1: PLOT x+pos1,y+pos2: OVER ...Font centering problemA while back today, I started coding a simple Othello/Reversi game in BASIC, with the precious aid of BASin (great tool, hope it eventually becomes b…
... (chars+1)
40 GO TO 210
50 REM Subroutine ... /> 60 REM in c$ at x, y
70 LET pos=CODE ... /> 80 LET y1=y
90 FOR i=0 TO 7
110 LET x1=x
120 FOR j=0 TO 7
220 FOR n=0 TO 9
230 LET c ... /> 240 LET x=n*6
250 LET y=175-n*7 ...Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…
... 't avoid the screen layout - the best way to deal with it ... is to create a lookup table that maps Y ... coordinates to screen addresses, and refer to that all the ... also swap the registers around to use HL if you want ...
