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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.…
... for a similar size text file (-40% compression); unpacking just takes ... file is the better the compression.
I ... few ideas on improving the compression (eg. increasing the window ... up further, as improving the compression will slow it down again ... -
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.…
... 34secs @ -58%, which gets the compression back up to around what ... /> --
Got the SCREEN$ compression down to 15secs @ -56% just ... this wasn't good for text, which needs the larger window ... -
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.…
... if I can improve the compression significantly. I reduced the match ... longer entries before any actual compression takes effect.
--
compression ratios are now around -62%/-41% for pict/text respectively. -
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.…
... entries in text-only files, so they all give 0% compression with ... , which was giving -41%/-62% compression, although that's probably due ... any significant repetitions in the text of the test files, which ... 'm aiming for -50% on text, which will entail even more ... -
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.…
... for reference. Compression ratios are -45%...-75% for text and -30 ... compression (doubling the window size from 2k-4k for text, ... indicators, different encoding rules for text & graphics) which ... more interested in improving the compression.
By ... -
SAGE gamebook project newsThat's the Spectrum Adventure Gamebook Enhancement, that is (for the time being, anyhow). I've updated the [url=http://www.users.globalnet.co.uk/~jg2…
... it indirectly, in that the compression routine on which I've ... 've got to compose the text for Wizard of Hotspot Hillock ... -
SAGE gamebook project newsThat's the Spectrum Adventure Gamebook Enhancement, that is (for the time being, anyhow). I've updated the [url=http://www.users.globalnet.co.uk/~jg2…
... record has a number of text segments (one for the location ... be a mixture of text & graphics, so text-only packers wouldn ... a go at writing a compression routine which did actually compress ... -
Blood MoneyAs the C64 had a version and it was good (although i rahter the ST version) this could be done with ease on the spectrum I feel. Music can be ripped…
... already uses some very effective compression.[/QUOTE]
No, I ... colour, probably white, with black text - no picture, music, or scrolling ... the crack credit, maybe some text, and the Presss-a-key ... -
DooM on Spectrum 128kHello my fellow WoS'ers My hope is that you can help me, recently I discovered a DooM clone -esque on the Humble spectrum, - here is a [URL="https:/…
... distinct characters, which gives 35 text & 171 graphic characters (7 ... would give nigh-on 50% compression. -
How much memory on sprites, maps etc.I've been tinkering with shifting & pre-shifting sprites recently, but as I haven't had that much experience with Z80 assembly I sometimes find it ha…
... skip empty space. Conventional data compression doesn't help all that ... coding for compressing lots of text strings.
If you ... -
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…
... of mainly grey text.
The text is grey because text after a ... ), the other six are in pairs to deal with 0 to ... .
The other three register pairs are called BC, DE, and ... -
What Spectrum projects (Software/Games/Utility)(Hardware)(Others) are you working on?So, basically that :) You dont have to give names or more clues if you dont want to ;) Also, if you are working on more than one, you can tell all of…
... looped routines and effects and compression to preserve as much memory ... for level data and expositional text.
I've also ... -
Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... . Scan the disassembly for pairs of adjacent blocks where the ... block, and join such pairs.
5. Mark ... /> 6. Scan all blocks for text and data.
text if its proportion of ... correctly identified as code, text or data, the static ... -
Maze Generator[URL=http://fastpic.ru/][IMG]http://i51.fastpic.ru/big/2012/1228/c7/d04669024fb0a70e66fcca07bc969bc7.png[/IMG][/URL] [URL=http://fastpic.ru/][IMG]ht…
... way of storing it without compression would be to use single ... personally would like is ... a text which defines a table in ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... Gamma even version offer better compression than the Gamma odd version ... | 5100
-------+-------+--------------------
text-1 | 4001 | 4035
text-2 | 7621 | 7594 ...
text-3 | 10967 | 10944 ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... seems my intuition regarding data compression really sucks! :)
-------+-------+-------+--------------------
text-1 | 3975 | 4001 | 4035
text data, increasing maximum offset by 6% improved data compression ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... bits len| in new prefix|compression| code len
... 3.55
-------+--------+-------+----------+--------+-------------+--------------+-----------+-----------
text-1 | 6859 | 3975 | 0 ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... discussion there about "optimal" compression algorithms, but it seems ... guarantee the best possible compression. This fact is mentioned ... compression, you must change struct "optimal" to store all possible pairs ... to store all possible pairs that achieve the ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... Villena), that should provide better compression for smaller blocks. In the ... /deexo/exoopt.c?content-type=text%2Fplain[/url]
Every ... /deexo/deexoopt.asm?content-type=text%2Fplain[/url]
I ... -
TommyGun with AGDHi everyone, I have been working with Jonathan to incorporate his excellent Arcade Game Designer utility into TommyGun. Jonathan has created a compi…
cycling text an the screen as a ... game screens still have linear compression along each row? -
"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…
... for binary files and uses compression.
[QUOTE=introspec;698807 ... upload to WoS a simple text file (for instance with author ... -
128k Basic used much ?Hi - I was wondering if there were many,if any, games programmed in 128k basic? I was also thinking of doing one myself as I wish to make a text heav…
... , there are tools to compress text such as [url=http://www ... the other thing, maybe the compression wasn't so good? -
128k Basic used much ?Hi - I was wondering if there were many,if any, games programmed in 128k basic? I was also thinking of doing one myself as I wish to make a text heav…
... the other thing, maybe the compression wasn't so good?[/QUOTE ... screenmachine can also compress [b]text[/b] or string variables (There ... sure there are much better text compressors out there, screen machine ... -
Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... might have a bit better compression rate compressed as 1 file ... a text file and a image file, probably the best compression ratio ... -
Making aText AdventureRight, I've not touched BASIC for many, many years(When I was about 10). I've written a text adventure game and would really like to put one on Tape …
... "compile" a design into a text adventure for the spectrum (a ... even add graphics support with compression in a future version. (The ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... as fast, but the compression ratio's not so good ... various different SCREEN$ & text files (as it's ... if I can improve the compression again.
... binary options mean:
Text : 1=text, 0=data
... yes , 0=no
Text=0 + Print=1 assumes that ... -
The new xbox...I hope the launch of the new xbox (6pm BST today!!) blows the dismal PS4 launch into orbit!! I'm not sure if I'm getting excited or not. I still rem…
... imagine there's very little compression or otherwise space saving done ... NPCs (give me that over text any day). And Jeremy Soule ... game had N64 resolution graphics, text-only dialogue and no "real ... -
Storing strings in minimum spaceIn the game I am planning there will be a number of text strings. I am looking into different ways of encoding the strings so that they use the minim…
... you compress your text or not.
Text adventures do it ... there's usually not enough text to worth compressing.
compression:
Temple of Terror ... with a huge amount of text. Its dictionary consists of the ... -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... . The free text box was very handy for checking letter pairs. I ... -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... . The free text box was very handy for checking letter pairs. I ...
