-
rotating HL left through CarryI've tried this several ways, and it works for a while, then a particular value has a bit set in an inconvenient place and it all goes to pot. Eg: "…
... one, but doesn't use look-up table.
[CODE]
ld a, l ...
ld l, a ;4[/CODE]
And finally, the ... tstates solution, in rot13.
[CODE]
yq o, u ;4 ... /> yq u, n ;4
[/CODE] -
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... br /> I have used a look up table for the char address, and ... speeding up the drawing of the sprites too.
[code]< ... LD HL,0FE00H ;BUILDING UP A TABLE WITH
LD BC ...
END
[/code]
_________________
[B ... -
maths help 'JSW'JET SET WILLY uses a lookup table to play the opening tune (Moonlight Sonata) this is the table [code] 34299 DEFB 81,60,51,81,60,51,81,60,51,81,…
... SET WILLY uses a lookup table to play the opening tune ... />
this is the table
[code]
34299 DEFB 81,60 ... DEFB 61,121,61,255[/code]
so for ... first 3 notes in the table are 81 , 60 , 51< ... I will use an alternate look up table. -
i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... I use a very handy look up table in the manual itself, LOL ... , etc, as well as your code. I'm progressing nicely with ... -
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... I have also created a look up table for the "xpos" gfx ... calculating graphics offset
[code]
; ********************************************
; ... /> END
[/code]
_________________
[B]Rob ... -
Optimisation Needed! Is this the Fastest way to copy bytes from screen and back again?I have the screen address (say 0,0 i.e 16384) I want to copy 4 bytes wide by 32 bytes high from the screen to an area of memory. I then want to cop…
... />
[code]
C2S_2:
dec ixh ... jr nz,C2S_1
[/code]
this is stupid: ... of DOWN_HL code (two pixel step, maybe smart look-up table)
... />
djnz do_it_again
[/code]
for every sprite, this ... -
how to pass arguments from Basic to MC ?can someone explain me (or give some link) how to pass arguments from basic to machine code? i mean something like this: PRINT USR xxxxx, arg1, arg2:…
... /> eg.
MACHINE CODE:
org 30000
call ... the image address from a look up table...
...then draw the image ... - 0 is first image in table
60 PRINT USR 30000 ... would call a drawimage machine code routine passing in the x ... -
Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... way is to use a look up table I suppose that holds the ... +384 = 391 / 39
[/code]
TABLE points to a 192 ...
RET ; 1 / 10
[/CODE]
This one takes ... -
How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... cleared, in a look-up table. Then, in your main code, work down that ... -
How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... cleared, in a look-up table. Then, in your main code, work down that ... -
plotting and rotating wireframesCan anyone point me to an example of plotting a (2d) shape and rotating it in basic. Unfortunately my trig was never that good and I want to get a h…
... are too slow. Machine code 3D games typically use fixed ... games typically replace these with look up table based functions.
I ... noticed I had some unnecessary code in my example, since ... function could just look like this:
[code] 900 READ ... -
Packing numbers in as least memory as possibleI am writing some code for drawing vector lines etc. on the screen. These need to be stored in memory and I want to pack them in a smaller area as po…
... plotting, you could use a look-up table.
For ... each, and a look-up table which matched those 4 ... three unique values, so your look-up might be:
code.
BTW ... room we create with this code
(i.e. ... -
SAM Games that never wereIn another thread on Multiloads there's been a bit of chat about US Gold's infamous statement about porting Strider to the SAM (which tbh if they had…
... and a switchable CLUT (colour look up table)) and that's a graphics ... could all be made to look like Amiga games as your ... RAM for extra animations and code. I wouldn't mind someone ... high res but making them look mint, The Great Escape too ... -
Sprites...What is fastest way for drawing masked sprites at any screen position without using preshifted data ? I want to use it for isometric view game... li…
Simple - use a look-up table to shift the sprite data ... it.
The table consists of 8 sets of ... (the second being 256 bytes up from the first).
... but if you have two code-paths for your renderer you ... in that case, reducing the table to 3.5K. As ... -
How to convert hex bytes to .. in assembly?I hadn't a clue what to put in the title so..., I have in memory 3 hex bytes #10 #34 #50, e.g.,[code][size=2]#6400 10 , 34 , 50 ; hex 25600 16 , 52 …
... be able to find some code (in whatever language) that does ... even z80 code.
Barring that have a look at RLD ... then there's always a look up table. -
One for the demo codersOn this occasion I forgot I had already asked the exact same question in another thread.
Look-up table with 256 or 128 entries ... in look-up table and get new attribute from table.
Look-up table will ... looks something like:
[code];look-up table aligned to 256 bytes, MSB ...
inc l[/code]
This code must be repeated 32 ... -
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... to speed things up would be to change the code which calculates ... star, I would use a look up table of screen row addresses. (I ... one" error in the previous code, which meant the very bottom ... ]
and the code:-
[code]
ORG 32768
< ... -
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... the aforementioned row address look up table. By the time I ... the index into the table and extracted the address ... use a lookup table.
[code]
ORG ... MOVEUP ;only possibility remaining is up
LD HL,STARPOS_Y ... DS NUMSTARS+1
[/code] -
shifting spriteshi. have anyone experience with shifting sprites by table ? some neat tricks ? i don't want to see complete code (really don't want, it trashes thr…
... similar to using a mirror look-up table, and having half the rows ... send to your email my code where I experiment with shifted ... -
New member here. And a spider! :)Hello everyone. My name is Sekrets. I'm quite a lonely individual, searching for a digital home where I might find fellow speccy enthusiasts to adopt…
... anyone wants to critisize my code, show me the error of ... put a semi-annotated source up too- [URL="http://www.angel ... 'll want to use a look up table for screen address mapping, but ... on the ROM disassembly. Well, look no further than [URL="ftp ... -
Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... B]
[CODE];-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
;
; Routine ... and use a look-up table to set the ... -
Arrays in asm ?Just following the idea to make the menu entirely in asm, how can i handle arrays in asm to store the each game loader to be loaded ? thx in advance
... a look-up table, which would reference both your name table, and filename table.
For example:
[CODE]NAMETABLE_ITEM1 ... NAMETABLE_ITEM3, FILETABLE_ITEM3
defw 0[/CODE]
With this you ... -
Sprite RotatingI was looking (actually at Everyone's a Wally), and noticed that all the graphics for the main characters are left facing, and two characters wide. …
... byte. these pieces of code are useless because it ... going to post whole code here because with all ... is really big chunk of code.[/QUOTE]
... if you go the Look Up Table route...hence my use ... have used 6...so the code should read......
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?
... [/url][/QUOTE]
How about:[code] di
ld hl ... /> exx
ei
ret[/code]
Interrupts disabled to avoid ... -friendly wrapper. Supply your own look-up table though :)Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... method is to use a look-up table - or actually 8 of ... combinations. You would then look-up the shift of the sprite ... you can select the table for the shift required ... 2K required by the shift table above.
... a lot about machine-code which can also be ...3D Wireframe/vector animation creator and player?Is there any software that can help record wireframe 3D animations by creating a file that stores just the coordinates and lines? If the answer is "n…
... matrix (p71):
[code]
| A0 A1 A2 |
[/code]
I didn't ... about it.
[QUOTE=Code Monkey;613932]For plotting, just ... of trigonometry, a quick sine look-up-table and a binary chop when ...assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... input you could consider a look up table (29 t-states) - but wasting ... 23 t-states...
[code]
LD H, lookup / 256 ... on a 256 border)
[/code]assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... input you could consider a look up table (29 t-states) - but ... t-states...
[code]
LD H, lookup / 256 ... on a 256 border)
[/code][/QUOTE]
This ... in A:
[code]
LD H, lookupMSB / 256 ... at 256 border)
[/code]Trailblazer - mapped?Anyone mapped Trailblazer yet? I'd kind of like to get hold of the maps. D.
... together and save them, ending up with 255 tile permutations coded ... maps in turn, POP each code off the stack and print ... pattern look-up table 48960 bytes, I couldn't even fit the look-up table into ...
