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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 …
... until and including first '1' bit, rest of offset will ... until and including first '1' bit, rest of length will ... 0' bit will be high and probability of '1' will ... prefix, and the bit marker to distinguish literal ... prefix, and the bit marker to distinguish literal ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... thinking about it a fair bit.[/QUOTE]
Emulation ... re-interpret the 8 bit attribute bytes read in ... the ink colour and only 1 bit used to define the ... differs only by a single bit, thereby making it as ... support attribute cell heights of 1, 2, 4 and 8 ... -
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 …
Einar, has you tried a xored RCS algorithm? I think you can add a simple variation to the ZX7 method for encode zero literal with less bits (for example 1 bit for zero, 10 bits for other literals and N+1 bits for matches). -
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 …
... with less bits (for example 1 bit for zero, 10 bits for ... other literals and N+1 bits for matches).[/QUOTE]
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 …
... for example 1 bit for zero ... additional bit to ... /> | Bit to indicate ... instance 2)
| | | | | | | Literal values (1 byte each)
| | | | | | | | ...
| ...CSW file formatHi, i can't google any reasonable description of CSW file format. Can anyone point me to right place ?
... than ROM and use diferent bit encoding.
I ... editor, find the first bit pulse after the sync ... for me.
'1' bit does one transition in middle ... '1' and bias is not affected.
'0' bit ... end - it ensures next bit will start on oposite ...CSW file formatHi, i can't google any reasonable description of CSW file format. Can anyone point me to right place ?
[QUOTE=catmeows;674486]'1' bit does one transition in ... end - it ensures next bit starts on same level as ... '1' and bias is not affected.
'0' bit does ... end - it ensures next bit will start on oposite level ... than the forth pulse (1.25-1.5). That's why ...utztape#3 - beeper music collection[IMG]http://irrlichtproject.de/downloads/utztape3.png[/IMG] [B]utztape #3[/B] A collection of tunes for the ZX Spectrum beeper [URL="http://irrlich…
... ! I admire the work of 1-bit musicians.
Beta 48 ...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 …
... (hl) ; load offset flag (1 bit) + offset value (7 bits)< ... rl d ; insert next bit into D
jr ... add a, a ; check next bit
ret nz ; no ...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 …
... (hl) ; load offset flag (1 bit) + offset value (7 bits)< ... rl d ; insert next bit into D
jr ... add a, a ; check next bit
ret nz ; no ...Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…
... , isn?t that a little bit like users who actually need ... be immediately squeezed into a 1-bit stream? Isn?t that cruel ...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…
... LIST]
[*]Adding a single bit per square (perhaps 4x4) to ... Empty cell. Encoded in 1 bit. Next bit is start of next ... More bits needed. Next bit is start of TL Quarter ... /> 0 Empty - next bit is start of BL Quarter ... full (by at least 1 bit per cell). But should ...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…
... over full (by at least 1 bit per cell). But should probably ... : Empty cell. Encoded in 1 bit. Next bit is start of next cell ... .
1: Partial. More bits needed. Next bit is start of ... Quarter.
1 Partially full (More bits needed) - Next bit is start ...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…
... notice your suggestion is basically bit-based entropy compression, where most ... case) are encoded as shorter bit sequences, and others are encoded ... : Blank screen is stored as 1 bit). Whether this is a win ...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…
... ]Maybe if in the '1' cycle, 1 becomes 1, but each '0' before ... of "RLE0-bit" that would only make it 1 bit longer). Actually I ... a smaller sequence than "RLE0-bit"...
I previously ... URL], before I realized "RLE0-bit" would work much better.
Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…
... on the result. Now if 1 bit is wrong, that will definitely ... show up as a bit set wrong in the result ... fault, and say every bottom bit of each byte is lost ... them in a bigger, 16 bit space if you want to ...Unravelling the Spectrum Floating Point Number formatHi Guys, In my head I pretty much understand how the Spectrum's 5 byte FP number format works. The first byte is the signed exponent and the follow…
... e as an unsigned 8-bit integer. 128 is the ... s) with an implicit leading 1 in the significand (mantissa)... ... ) = 0, and not −1 as one might perhaps expect ... original CRAY architecture (CRAY-1, X-MP and Y- ... to have the implicit leading 1 bit. IBM S/360 exponents ...RoguelikeI made a 1 bit tile set for a roguelike game, and then I made a Spectrum mockup. My colour choices are terrible, but if you want to code a roguelike…
... =Trihook;690255]I made a 1 bit tile set for a roguelike ...RoguelikeI made a 1 bit tile set for a roguelike game, and then I made a Spectrum mockup. My colour choices are terrible, but if you want to code a roguelike…
The tiles are 1 bit, you can color them any ...+2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…
... />
contended RAM are banks 1,3,5,7
1 pairs = 16k X 4 pairs ... pair positions?
BANK 1 IC's 18-26
1 Bit Dynamic RAM with Page mode ... organized as 65,536 one-bit words."
[URL]http:// ...+2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…
... the KM4164B datasheet: "64K x 1 Bit Dynamic RAM with Page mode ... organized as 65,536 one-bit words."
[URL]http://www ...Surely not Buzzsaw+ Already..?But this game has had such a short development time, how can this be? Free version of [I]Buzzsaw+ (Foxton Locks Mix)[/I] available here: [url]http:…
... like having a rubbishy 16kHz 1-bit sample player that turns on ... clear 0-0-0-0-1-1-1-1 sequence is screechy because of ... . But that may be a bit too ambitious.
Naturally ...New ZX 1k hires game : Q*Bert[url]http://www.sinclairzxworld.com/viewtopic.php?f=4&t=552&start=20#p11908[/url] Still working on improvement (i.e. multilevels), but this is the f…
It took me 1,5 hour, but I managed ... now the playfields only had 1 bit to set the 'colour' of ... win the timing was a bit tougher than thought, but I ...Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…
... any tips and tricks of 1 bit sound generation. Is there a ...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 …
... They may be a bit complicated for you to ... was this the last bit in the current byte?< ... UM3 JR NC,UM4 ; "1" means "copy an uncompressed byte ... "0" means "shorter codes", "1" means "longer codes"
LD ... into the output directly (1 bit gained per input byte)< ...1-Bit Wizards - The Journey Begins[IMG]http://irrlichtproject.de/pix/8bwc.jpg[/IMG] After 1,5 years in the making (or rather wasting away on various hard drives), the 1-Bit Wizards' …
love these 1 bit albums - really enjoy them Thanks!!!generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... one is doing the attributes 1 bit at a time but it ... />
lfsr_galois:
; 16-bit Galois LFSR
; x^16 ... ^13 + x^11 + 1
; hl = 16-bit Galois state
