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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…
... of the ten sprites, a table lookup finds the speed each sprite ... -
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…
... />
A hash table is a fast table lookup. One stores (key,value ... ) pairs in a hash table. One ... to one of the hash table's table indexes. So a quick ... on "key" to a table index immediately divides the number ... -
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…
... circle into units of 256. Table lookup will be a little bit ... and sine COMPUTATIONS (you do table lookup for that so this doesn ... be done faster, again using table lookup, but I'd also investigate ... -
Graphics Mask FormatsHi. Just a quick question. I'm curently hacking a little program to aid my in my own ZX development (i'm hoping to build a little collection of tools…
Potentially page aligning a table and putting each byte/mask ... some speed advantages, since a lookup would be reduced to loading ... -
basizx newsHello. I've uploaded a new version of basizx. Now there is also an Amstrad CPC incarnation, able to LOAD and SAVE +3 basic files in disc. And the I…
... done for variables. Create a table of pointers that point to ... embed an index into the table where the variables are used ... />
Elimination of the slow lookup times for line numbers and ... -
What control methods should I supportAs Bipboi is nearing it's completion, I need to ensure i cater for all control methods required by the users. Currently it just supports: keyboar…
... sample code that performs a table lookup to translate the returned byte ... -
One for the demo codersOn this occasion I forgot I had already asked the exact same question in another thread.
... want it. Doing it by table lookup will certainly be fast enough ... -
Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…
... 'd need to do a table lookup twice, once of where to ... -
Goldfinch - an open software stack for mass storageYep, another pet project of mine to compete with all the others I've started. But hey, if I didn't get distracted by things like this I'd just get di…
... ) contains an optional user-specified table of letter and device driver ... the driver in the aforementioned table that is associated with the ... an index to a jump table, along with parameters passed in ... driver should do a jump table lookup for the message id and ... -
2 questions about matrix and string handlingI was never good at understanding how to do something random in Sinclair Basic without repeating something that was already done. Had problems unders…
... the obvious implementation (using a table lookup in a multi-dimensional array ... -
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…
... /> [/quote]
The table lookup should be done using a ... of the shift right table (the table holding the result ... 47 inc h ; next table!
48 ld l,( ... 53 dec h ; previous table!
54 ld a,( ... -
Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …
... byte lookup tables for mirroring and maybe a 512 byte table for ... a nibble shifted table for allowing sprite ... -
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. …
Oh, NOW I see what you mean.
Of course. When you said use it as a lookup value, I didn't quite follow. Yes, I see - a table of numerical alternatives. The 4th value in the table is the mirror or rotate of "4".
Got you. -
Help! Reverse engineering a Spectrum game[deleted]
... lookup routine, that is; pixels to display pointer using an index table ... -
Help! Reverse engineering a Spectrum game[deleted]
... lookup routine, that is; pixels to display pointer using an index table ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... modulo 65536 (SP, PC, interrupt table lookup, etc)
[QUOTE=PeterP ... -
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?
... : Either create a table and do a lookup when required
2 ... nicer but after running the table generation routine you can happily ... /> ; makeRev Builds a 256 byte table of reversed values
; hl ... 't need to create this table
; 20/20 hindsight
Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... shifts approaches 7, use a table lookup to find the graphic byte ... br />
If you use table lookup to do the shifting you ... /> inc h ; switch rotation table to current table
ex de,hl ... , rotation of G done by table lookup
; write A ...Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
...
; h = remnant rotation table MSB
; de = current sprite ...
; h = remnant rotation table MSB
; l = sprite graphic ... inc h ; switch rotation table to current table
ex de, ... , rotation of G done by table lookup
; write ...z88dk stdio fopenI'm trying to write a fcntl library, based on the p3.lib one. Looking at fopen(), it calls freopen_z88() which turns the mode string into mode and f…
... will be done in a table lookup so I am very flexible ... * this is a complete truth table for file creation for disk ... /> [/code]
From this table I can already see there ...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 …
... . Horizontal shifting is accomplished via table lookup but the draw routines are ...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 …
... . Horizontal shifting is accomplished via table lookup but the draw routines are ...LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…
... build up a 512byte history table (a 2-byte address for ... window. Using an indexed lookup from the table for an initial match ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... .
It implements a "table lookup" routine, used when reading an ...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…
... could consider a look up table (29 t-states) - but wasting ... />
[code]
LD H, lookup / 256 ; 7
LD A ... L,A ; 4
lookup: precalculate all answers (put this ...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…
... could consider a look up table (29 t-states) - but wasting ... />
[code]
LD H, lookup / 256 ; 7
LD A ... L,A ; 4
lookup: precalculate all answers (put this ... of all answers (if previous table is in
a 256 ...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…
... of all answers (if previous table is in
a 256 ... still:[code]
LD H, lookup / 256 ; 7
LD L ...BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... ]But it has a massive table of addresses to speed up ... . :-?[/QUOTE]
I considered using lookup tables, but they would be ...c64 > spectrum ?I was recently talking to a c64 coder, (the guy who wrote mega apocalypse on 64) and he was telling me the speccy maker of the game used something to…
... emulate each 6502 instruction via table lookup, rather than do any code ...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…
... 'd expect that a lookup from a 24x32x2 table would indeed be ...
