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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 …
... of the ZX Spectrum memory map and some bytes ... (basic type). The game itself is stored in a ... /> I use the shortest BASIC loader of Paolo Ferraris, download ... BIN2REM for more detalis. In tape generation I avoided ... do the block load in BASIC, because LOAD"name"CODE ... -
Newbie Spectrum developer advice ....Hi, Im new to the site and to spectrum developing - well, not quite, I wrote Spectrum programmes in Basic 30 years ago but then went off into the wo…
... output. Just select "Emulate printers" in Options:Peripherals and LPRINT/LLIST ... go to a text file in the current directory. Z80 ... routines are called which are in the top page.
< ... with the extra memory from BASIC, apart from saving extra BASIC, CODE & ... -
Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…
... looking for a chunk of free memory I just switch to the ... change the value for A in the LOOP line. The program ... need changing to switch in each RAMpage in turn.[/strike]
sbc hl,bc ;HL=bytes# in (VALUE) block
ld de ... -
+3e filebrowserHello everyone, Im writing a game/program loader for the +3e (with an IDE interface, but it can work with floppies too). The program lets you choose…
... guess I'll be done in a couple of days, and ... media; it will take less memory, but I guess the overall ... wrote a 1st version completely in BASIC and the speed difference is ... huge. Boriel's ZX Basic Compiler is really nice (for ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... already have).
6-In BASIC type Save "loader"LINE 1 ... loading screen file you saved in step 1, Type load""CODE ... saved as 6912 bytes at memory address 32768.
8 ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... ).
6-In BASIC type Save "loader"LINE 1 ... saved as 6912 bytes at memory address 32768.
in Basin. Then make a ... the LOAD "" SCREEN$ in the main basic program). Then I ... first as one chunk of BASIC, then load the SCREEN ... -
Beta testing FuseHello everyone, We are preparing Fuse for a new release soon and would appreciate help in testing that all the new features and all the old features …
... i had this some times in the stablefuse version aswell, but ... just lost a part from BAsic in ZX memory becouse i formatted a ... are holding a program in the Spectrum's memory, in case the program ... a double density track in the 'main' memory starting at address ... -
Use of saving arrays ?I was wondering did much software (cannot think of any of the top of my head) make use of the facilities to save and load arrays ? :) I had to check…
... /> 80% of it was written in BASIC and it was an amazing ... made most use of the memory available. Both Dungeon and Characters ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... the game, the ([I]entire memory filling[/I]) code and the ... code was stolen from games in BASIC games books 5) Many other ... -
New presentation for ZX Spectrum: "New Wave"DOWNLOAD: [url]http://pouet.net/prod.php?which=61133[/url] [img]http://pouet.net/screenshots/61133.png[/img] Enjoy.
... When you save a song in Soundtracker, it will scan ... checking which pattern numbers are in use. If it finds ... done in-place, as there's not enough free memory to ... the bug only occurs in more limited circumstances than ... that the bug is in the loading routine, not ... -
Last 16K games....Just wondered.... I updated my speccie from 16K to 128 by continually returning it with (ahem) faults. But, for those who could not manage to pay f…
... theirs from 1984 written mostly in BASIC (that's a topic for ... to be more than 50% BASIC?)[/QUOTE]
Firebird certainly ... have been written to run in 16K, as there had been ... didn't need the extra memory of the 48K machine. -
Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …
... to need a lot of memory, but the risk of ... very slow and cautious in coding. In later years we got ... necessary code for a game in a small chunk of ... use the rest of the memory for storage of scenery, ... editors I wrote for myself in BASIC. But it never amounted ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... already have).
6-In BASIC type Save "loader"LINE 1 ... loading screen file you saved in step 1, Type load""CODE ... saved as 6912 bytes at memory address 32768.
8 ... -
New presentation for ZX Spectrum: "New Wave"DOWNLOAD: [url]http://pouet.net/prod.php?which=61133[/url] [img]http://pouet.net/screenshots/61133.png[/img] Enjoy.
... When you save a song in Soundtracker, it will scan ... checking which pattern numbers are in use. If it finds ... done in-place, as there's not enough free memory to ... the bug only occurs in more limited circumstances than ... that the bug is in the loading routine, not ... -
A quick newbish questionI'm reading through 'mastering machine code on your spectrum',as kindly posted by Mr bert on this forum. Correct me if I'm wrong from what i read,bu…
... the basic command 'POKE'.Is this poking th areas of memory ... 65536 8 bit locations in which you can store ...
Try POKE 16384,255 (in BASIC) and you'll see a ...
To POKE a location in assembler
[code]< ... two values, working from memory. -
Font hack that was used in a lot of early gamesThere was a little hack for changing the fonts on a spectrum and I remember it being used in a couple of old games on the 48k, it was a sort of ye od…
... Even correcting the line length in the auto-run line, as ... example, will fail with "Nonsense in BASIC". For why, I'll explain ... will fail with "Out of memory". However, before executing any line ... yonder and gives a "Nonsense in BASIC" error. Attempting to auto-run ... -
SAM Coupe - a video problemHi mates. Lately I managed to acquire a SAM Coupe 512K. There are, however, certain problems that - I thought - You might help me with, in a mome…
... might help me with, in a moment of free time.
... Several photos of the error, in better resolution:
[url ... ) or can be bug in ROM chip (very old ... load any game (not games in basic) or ZX emulator ?
... will see stable graphic in ZX mode or during ... -
SAM Coupe - a video problemHi mates. Lately I managed to acquire a SAM Coupe 512K. There are, however, certain problems that - I thought - You might help me with, in a mome…
... reading video data from memory. Can you test in basic commands:
in all this modes. -
SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
... as an additional upgrade option in the future. The aim would ... style the case to fit in with the original Spectrum, Microdrives ... , and hence a bug-free version of BASIC would be instantly available ... code in the EPROM would only run when a standard BASIC error ... -
BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... Buffer and associated variables in RAMpage 7, which entailed ... to trap the "Nonsense in BASIC" error that's produced ... with an "Out of memory" error if the stack ... which will include the BASIC loader with the restart ... getting an "Out of memory" error, as both the ... -
New WIP underway: The Speccies.Perhaps this will be of interest to one or two of you. ;) I'm working on a new game which will be coming you way soon. On this project I'm working w…
... porting, Sokurah :)
In CPC we have a lot ... that they would look great in ZX... a ZX colourful Skweek ... "[B]Tiny Skweeks[/B]" (in the DOS, Amiga, Atari ST ... also see how much free memory I have in the end and ... you can only play in the skewed pseudo-3D ... -
File comparitorI thought Taper might do it but its not quite what I was after. Unless I misunderstood that shows if tapes are identical or not but not the differenc…
... by what can fit into memory. This is the controlling ... external GOSUBs refer to routines in my [url=http://www ... . It's too slow in BASIC, but it gives an example ... . The full listing is in the [url=http://www. ... a compressed hex byte. In the example picture the end ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... memory (in Spectrum terms). It's easy to write it in Spectrum BASIC in ... needs several meg of memory for any decent sized ... it ran out of memory; but when making it ... number of non-zero edges in the graph */
... /* The number of nodes in the graph */
long ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... , both speed wise and memory wise. All you need ... URL] strategies. It's in Portuguese but it doesn't ... look at the illustrations in slides 13 to 22 ... QUOTE]
Not in BASIC perhaps, but it is fast ... I've used it in several games in the past.[/QUOTE]
Siege RTS projectActually, it's but pre-prototyping: an upside-down tower-defense version of Sodov ([url]http://www.worldofspectrum.org/infoseekid.cgi?id=0004618[/url…
... think, will it be about memory or CPU?
A ... , I can code a little in Basic, Pascal, Delphi, C, and GM ...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 …
... to load it all in memory.
In this case, the process ... have any extra work here. In this example, you can simply ... />
[*] Finally write a ZX BASIC program that will contain the ...DIVMMC, a new compact interface for ZX SpectrumAfter a long gestation period and a short period of testing, Mario Prato, member of the Italian [URL="http://apuliaretrocomputing.wordpress.com/"]Apu…
... old DIVIDE use small memory ram 32kB and new ... disc because is no free memory for backup zx screen ... to browser). DIVMMC use compatible memory paging as original divide + ... (not need swap) and in future can be new ram ... install systems to EEPROM in DIVMMC. :-)Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... would love to see improvements in the compiler/optimiser (specifically ... it can add disjoint memory blocks to the free list and it ... has the same in its balloc library (block memory allocator) but ... borrow your terminology. The free blocks in each slab size are ...Type in game with font generatorBack in the day I can remember a BASIC type in game that generated its own font by PLOTing extra pixels next to the PRINTed characters existing pixel…
... wrote a chararacter generator program in BASIC which used the joysick to ... big I ran out of memory writing it, and had to ...Last of my +3 disks and....a Wafadrive! Anyone actually ever use a Wafadrive back in the day? [url]http://shop.ebay.co.uk/millys-pigdog/m.html?_nkw=&_armrs=1&_from=&_ipg=&_t…
... />
If the programs are in Basic, you've got no problems ... Epson printer, print graphics from Basic, a printer channel driver,
memory=0&language=0& ... "]a single wafadrive image[/URL] in the archive - so someone (preservation ...
