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Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... routine length is around 450 bytes.
I ... copying chunks of 14 bytes. 256 unfortunately doesn't divide ... in each page of 256 bytes we can only do ... way which leaves 4 uncopied bytes:
[IMG ... 256. This way however our chunks won't be 14 bytes ... -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... copying chunks of 14 bytes. 256 unfortunately doesn't divide ... so in each page of 256 bytes we can only do ... 14*18=252 bytes this way which leaves ... 4 uncopied bytes:
[/QUOTE]
bytes per chunk.
Rendering clipped glyphSometimes you need to render a glyph of arbitrary size to the screen. And clip it. For example: drawing a mouse cursor means combining drawing of a…
... address table is then only 256 bytes long for 128 possible rows ...A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…
... (Rar2-like with depacker under 256 bytes) which is still the best ...Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... runs before main) reserves 64 bytes on the stack for an ... a nice safe number is 256 bytes.
If you become ... the stack area with some bytes (0xff; the unix world famously ... how many of those 0xff bytes were overwritten.
(3 ...Which Emulator supports Betadisk48?Hi out there and happy new year, I'm looking for an emulator to run with my vision1.7 trdos-rom in 48 mode. Unfortunately most emus only support Bet…
... BASIC variables (23734 to 23845) + 256 bytes in printer buffer (23296 to ... variables (23734 to 23866) + 256 extra bytes of BASIC variables every time ... ).
(* or it's 112 + 256, depending on what you read ...The official CSSCGC 2014 threadJust to announce that the comp.sys.sinclair Crap Games Competition 2014 is now open. It's home for the year will be; [url]http://www.mykeweb.co.uk/c…
... just swap the UDG portion (256 bytes) all the time, but if ...The official CSSCGC 2014 threadJust to announce that the comp.sys.sinclair Crap Games Competition 2014 is now open. It's home for the year will be; [url]http://www.mykeweb.co.uk/c…
... just put the next set 256 bytes lower - it's wasteful, but ...Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... key is use a 128 bytes table instead 256 bytes oneMirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... only pourpose of generation a 256 bytes lookup table in the file ...Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... display file, but it needs 256 bytes free below the input file ... compression, which only left 88 bytes for BASIC, so I couldn ... up the compressed file by 256 bytes so that I could restore ...Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... display file, but it needs 256 bytes free below the input file ... compression, which only left 88 bytes for BASIC, so I couldn ... up the compressed file by 256 bytes so that I could restore ...Are there any custom +3 DOS file systems?I'm looking to see if there are any custom +3 DOS disk file systems available rather than the 40 track, 9 sector, 512 bytes/sector (I think that is r…
... we're stuck with 512 bytes/sector. That's a shame ... do things.
512 bytes/sector had (has) a good ... size that is supported is 256 bytes.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 …
...
jr nz,lp ;fill 256 bytes
cpl ;toggle 170 and ... 100% confidence that my 16 bytes cannot be beaten :DHow to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... to need to be pointed 256 bytes below the actual data!
ld hl,udg-256 ;has to be 256 less than actual start ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... thought it had to be 256 bytes less then where the actual ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... thought it had to be 256 bytes less then where the actual ...ZX Spectrum code examplesThe shortage of sites with decent code examples seems to be few. The links to alot of sites that used to host them are disappearing into the ether. …
... s made up of 8 bytes each containing 8 horizontal ... . So, the first 32 bytes loaded fill in the top ... character. the next 31 bytes complete that pixel row and ... row in each character is 256 bytes further on in memory ... if you added another 256 after you'd written ...Ghosts n' Goblins loaderI'm trying to put Ghosts n' Goblins onto a +3 disk but struggling to understand the mc loader. Basic loader [code] ink 7 : clear 25000 : load "" cod…
... from $5B00 to $FEFF ($A400 bytes).
That's the ... set at $5C00, since the 256 bytes from $5B00 to $5BFF are ...Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…
... business) so that fscanf reads bytes from a local buffer and ... problem to have to allocate 256 bytes for each open file handle ... :
BC = number of bytes successfully read
DE'= void ... br />
BC = number of bytes consumed from stream
HL ...quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... doing, as it's assigning 256 bytes in 768 ) don't use ...writing incrementally to tape without leadersI want to be able to write intermittently & incrementally to some sequential medium which is supported on any Spectrum (emulator, ie. tape); eg. [cod…
... /loading data in blocks of 256 bytes instead of one continuous block ...Optimal shifting for set pixel?Hi, I'm optimizing my set pixel code. For speed. But without using partitioned memory (i.e. a table on 256 byte boundary) I have optimal memory addr…
... #7;
LD H, table/256; # locate table in such manner ... />
easy way is fill 256 bytes with the same sequence, so ... /> [CODE]
ld h,bw/256
ld l,X; X ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... to set your banks up 256 bytes apart instead of 160. That ... to change banks, not both bytes.
Replacing the character ... your chosen UDG. Then add 256 to the screen address and ... byte, and so on, 8 bytes in total.UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... have to make it 768 bytes (or 256?) smaller than the actual ... representation. And 32 characters * 8 bytes = 256 bytes.
So you point ... be able to print with 256 different UDGs, you can always ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... variable to move it down 256 bytes.
The definition of ... edit the addresses to be 256 bytes lower:
[CODE]< ... 1 lower, which relates to 256 bytes lower in memory:
[ ... 3 banks, CLEAR 64855 (another 256 bytes lower), POKE the UDGs in ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... /> Note that CHARS points to 256 bytes less than the actual graphics ... (and 32 characters x 8 bytes = 256 bytes).
The Spectrum has ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... an extra bank of UDGs 256 bytes lower and POKE the upper ... system variables, a few hundred bytes of data which are set ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... an extra bank of UDGs 256 bytes lower and POKE the upper ...
