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Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... our machine code at free, fast-running (over 32768) and ... GAMEOVER change line 55 to 'jp PRINCIPALLOOP'.
Assemble, save, ... is slow down our blindingly fast machine code.
Insert ... /> jr nz, wait
jp principalloop
gameover
pop ... -
tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …
... /> [CODE]
call_from_table
;HL = table
;A = ITEM
call_from_table2
jp 0
[/CODE]
Fuse too fast on karmic ubuntuI have tried various types of Fuse, including the .deb file from the Ubuntu site and binaries and source code, and the results are all the same when …
... />
The emulation runs too fast and the sound is corrupted ...A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... />
__DRAW_ERROR:
jp __OUT_OF_SCREEN_ERR
DRAW ... ; and (hl)
jp __DRAW_START
... in free E register
jp __DRAW4_LOOP
... in free E register
jp __DRAW6_LOOP
...Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…
... as dictated by the screen table) it works fine and passes ...
call nc,draw
jp keys
draw ld b ... /> ld hl,seed ;screen address table pointer
inc (hl) ; ... /> seed defw screen ;screen address table pointer, table below
screen defw ...enJine: a fast tilemap enginetile engine based on excellent work by Joffa Smifff. here you can download first tech demo. [url=http://ketmar.no-ip.org/tmp/enJine.tap]Get It Now![…
... can be used to create fast games like Cobra or FireFly ...Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... ,(level), cp 1, jp z,printscr1,cp 2, jp z....and so ... 'm thinking an ix lookup table with x,y coords for ...3D graphicsWould be there interest in some tutorial about 3D vector graphics on zx (my slowly paced side project) ? EDIT: [b]Content[/b] [list] [*]The Math [*…
...
[*]Quite fast line drawing
[*]Quick math: table driven algos for ... caching and object abstraction
[*]Fast PutPoint
[*]Rotating starfield
automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …
... absolute addresses used by CALL, JP, etc. when code is moved ...
;a simple example table of address+content word pairs ...New game: Dex[b]DEX - A painty-maze game for the 48K/128K Spectrum.[/b] [IMG]http://i52.tinypic.com/ip5zeu.png[/IMG] [IMG]http://i56.tinypic.com/euqyv6.png[/IMG]…
... /> Fancy jingles!
High score table!
Three difficulty levels!
fast to be playable). Since then ...Z80 DOS Sorry this computer is too fast!I?ve tried the free Z80 Emulator v4.00 (DOS Version) downloaded from Gerton Lunters Homepage on my Intel Core2 Quad Q60 running at 2,40 GHz an it ju…
... /> Sorry --- this computer is too fast!
----- Snap -----
Can ...Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... />
call draw_tile_line
jp start ; Infinite loop
table
inc hl
table, store it here
table
ld a,255 ...Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
...
ld l,c
jp (hl) ;JP address
;PRINT ... /> pop af ;A =token's table offset
cp $03
Fast Lane - Never released game from AnacondaAccording to "The games that time forgot", there was a game in early stages (Mock screens) recovered from the Anaconda development disks, called Fast…
... the Anaconda development disks, called Fast Lane.
Its a ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... principles behind having a vector table, after reading a number of ... so they're moving pretty fast at the moment. The backgrounds ...Z80 instructions tableI could never find a complete z80 instructions table (including timings) that I really liked. All reference material I have is either incomplete, or …
... find a complete z80 instructions table (including timings) that I really ... to prepare a z80 instructions table exactly the way I always ...Matching calls and returnsHi all, A pretty fundamental question here that I probably should have sorted by now. I've noticed how much the stack has built out in my current g…
... much memory and my vector table is further back.
jp back to the very beginning ...Cricket. Duckworth/Lewis calculator.I'd appreciate it if anyone here who enjoys cricket, and ideally is also familiar with the rules of one-day matches takes a look at a little program …
... -keys to scroll around the table of Over-by-Over scores ... navigation around the Par-score table quite fast, the calculation of the ... computes the scores faster, the table of scores takes under two ...Fast n Furious and Interceptor in-game screenshotsare not consistent with the ones displayed in their own entries (not the compilations). As far as I can see, the screenshots displayed in the compil…
... .worldofspectrum.org/infoseek.cgi?regexp=^Fast+%27n%27+Furious+%2b+Thunderceptor ...The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... the reason behind the 257-table for IM 2 routines is ... this: is the 257-byte table really needed for [B]new ... of kilobyte for the IM2 table, but if space begins to ... resource, would you sacrifice that table and assume that the low ...Multicolor/RGB3/3color fast low flicker software available?After giving myself a near migraine looking at 3 colour image (3 frames, red, green blue) anim gifs in a test version of image to zx spec I'd like to…
... that can display these images fast enough along the lines of ...IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…
... reg to acess a table containing an x and ... first data member of the table?
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; ... ix,shptbl ;point to ship table
ld a,(ix ... to far right
jp z,shprst ;yes then reset ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... this version is twice as fast as the last version I ... bc
dec b
jp p,L30
L50 ...Stiff Cassette TapesI recently brought a copy of Pud Pud on ebay for 99p. The case, and cassette tape look to be in good condition except it wont play properly. I've tri…
... times on a table edge.
2) Fast forwarding the tape ...Happy Birthday JP!Happy Birthday JP! (Though taking the time difference into account it may no longer be your birthday) Happy hacking all the same :smile:
Happy Birthday JP!
(Though taking the time difference into account it may no longer be your birthday)
Happy hacking all the same :smile:"Chronos": how fast should it really be?I was reading [URL="http://timfollin.pwp.blueyonder.co.uk/Archive.htm"]Tim Follin's webpage[/URL] the other day and came across a curious remark abou…
... is not really twice as fast. With the fixed scroller the ...Chronos (BUGFIX)Please add the following "known errors" entry to [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0000951"]Chronos[/URL]: [QUOTE]Bugfix provid…
... really make it twice as fast. The most efficient reimplementation for ... br /> djnz 58431
jp 58556 ; skip remaining of original ... should be Sinclair)
56940: jp 57068 ; enable Sinclair (should be ...
