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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 …
... br />
push de ; save radix
call ... /> pop hl ; hl = char *string
ret ; carry reset
memory
jp nc, stdio_error_zc ... -
Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …
... /> .msgprt ld de,$5068 ; screen memory where messages will appear
push hl ; store our string address while we borrow HL ... data
ld (de),a ; save onto screen
inc d ... to next character in screen memory
pop hl ; retrieve character ... -
Project on ZX Spectrum in UniversityHi everyone, I am Max, student of media studies in berlin, and I have to do a little project on the spectrum. I am working on a sinclair zx spectrum…
Without VAL$ it would be ... memory starting at 's' and returns them as a string:< ... br />
DEF FN j$(s,l)=CHR$ PEEK (s)+VAL ... be themselves variable by using VAL$. Thus, if v$ holds ... /> for a string, or:
LET anumber=VAL VAL$ "v$"
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…
... with the extra pages is SAVE! & LOAD! the RAMdisk, ... something is loaded into main memory it overwrites what was there ... to see if any significant memory savings could be made ... rather than explicit literals; using string instead of number arrays; using ...The Great Escape disassemblyHi, Over the past few months I've been steadily chipping away at reverse engineering Denton Designs' classic 48K title, The Great Escape. I'm now a…
... Spectrum you'd be typing string data into an assembler in ... many bytes as you'd save. But at least you'd ... starting 256 bytes lower in memory. So when you come across ...16k programmingHi all, If I want to code something for a 16k (or any spectrum) my understanding was that if I CLEAR below 24064 and put all the code above it up to…
... san save a bit of memory if you convert those numbers to VAL ...16k programmingHi all, If I want to code something for a 16k (or any spectrum) my understanding was that if I CLEAR below 24064 and put all the code above it up to…
... san save a bit of memory if you convert those numbers to VAL ... . Never bothered with all that VAL stuff before but perhaps I ...16k programmingHi all, If I want to code something for a 16k (or any spectrum) my understanding was that if I CLEAR below 24064 and put all the code above it up to…
[QUOTE=Sokurah;697704]Don't forget to put a CLEAR in there. And you san save a bit of memory if you convert those numbers to VAL values too.[/QUOTE]
I always wondered why they were there when I saw a VAL statement in a basic loaderZX-Assembler in progress...Dear readers, I just want to announce that ZX-Assembler is not longer only an idea in my mind. It's just alive. Unfortunately, it's too early to mak…
... of manual marking parts of memory as code or data. Code ... option obviously)
a single string
several strings separated by ... automatically reorder them in memory and always save it again in order ... cells of the now used string grid, even if the data ...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…
... on a 48K if you save them from a 128K? What ... be a memory hog and use a 32*22 string array instead ... from a UDG as scratch memory anyway if I wanted to ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... screen, we insert a longish string of zero pulses (512T in ... />
;; start loading into high memory
ld ix,.attrs
;; save registers; at this point in ...Lime Rick, like Snake but with gravity[B]Lime Rick[/B] by [url=http://www.kissmaj7.com/games/]Kissmaj7[/url] is an elaborated version of "I Left Myself Behind". It's a puzzle game with an…
... and turned into a short string of HEX so it can ... /pasted directly from/to emulator memory? In this case each compressed ... traditional option to load and save levels would be probably easier ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... VAL "23999": LOAD ""CODE : RANDOMIZE USR VAL "6e4"[/CODE]
Afterwards save ... Maybe some kind of memory allocation?[/QUOTE]
... kept compressed in lower memory, and
... located in contended memory, thus leaving uncontended memory available for
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... line.
[*]Decimal to hexadecimal string function: ~9
[*]Default high ... .
[*]Quick start guide, including memory map, system variables, flags, and ... embedding control codes.
[*]Save ULAplus screens with SAVE "screen" 16384, 6976 ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... defw x80_fbands ; binary and string
defw x80_fcp ; $ ... addition
defw x80_fval ; val$
defw x80_fusrs ; usr ...
defw x80_fval ; val
defw x80_flen ; ... defw x80_fst ; store in memory
defw x80_fgt ; ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... pre-calculated coordinates into a string array p$() with 2-byte ... them off with POP. The string array takes 5kb for 8 ... () & p$() arrays are in memory in the snapshot. In case ... an idea I had to save all the results from PIXEL_ADD ...Outputting debug trace to RS232 (assembly)Hi Guys, I'm working on a game at the moment (written in assembly) but I am really needing to write out a debug trace of what is going on with the p…
... but having to write a string of BASIC before doing the ... a block of memory then do a memory snapshot save. It is a ...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 …
[QUOTE=na_th_an;748830]Available memory is incredibly tight, so it' ... of data compression, you can save quite a few bytes using ... in previous letter. You can save another bit using capital letters ... to 31 appear inside a string, the corresponding diagram or word ...Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…
... correct position, and enter the string DEFW (define word), press ... CURSOR right, enter the string DEFW, CURSOR right once more ... ]
MEM - display free memory
CLEAR - clear the ... memory
BASIC - return to BASIC
[B]Edit, save ...The 20th comp.sys.sinclair Crap Games Competition thread!Hi all, [SIZE="7"][B][CENTER]ANNOUNCEMENT![/CENTER][/B][/SIZE] The comp.sys.sinclair Crap Games Competition 2015 is now well and truly OPEN! [url]…
... /Emulator to do this using SAVE?[/QUOTE]
No ... type the keywords in the string you're saving. The only ... want something like BORDER or SAVE you'll need to press ... backspace in this way: SAVE "LEN AND VAL GO TO BRIGHT "+CHR ... 78+CHR$ 235+CHR$ 217: SAVE n$ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... A graphical list of the memory map, showing you black boxes ... list ...
[code]String: 32768 .. 32772
Data: 32773 ...
String: 32774 .. 32778[/code]
... rather ... be helpful if you save the map list to ...EmuZwin 128k banks in assembler Having looked at the assembler help file " ORG [{ RAMn | ROMn },] #target_address [, #dest_address ] Defines target assembling address and ta…
... 0 (to keep the 128k memory available), assembled the code, tested ... new load/save routine - basic memory permitting with my mate VAL.
New NIRVANA+ feature: wide tiles!The size of each bicolor tile in [b]NIRVANA+[/b] is 2x2 characters (16x16 pixels), like this: [img]http://i60.tinypic.com/mw358y.png[/img] [i]* M…
... the level data as a string of PUSH commands, then extract ... memory you want to occupy with pre-shifted tiles. You can save ... timing and the spacing in memory constant.
If you ...ZX81 Character SetHello, hope I don't offend anyone with my request. I've put together a program on my Amstrad that redefines a condensed text and displays it appropri…
... the data into a string variable, this is slightly ... the address of the string changes as the ... and then save it with the array in memory - make ... font will quickly exhaust available memory.
... to work with character/string variables instead. Ideally ...Internet enabling a SpectrumHi, Yonks ago, I floated the idea of using one of these: http://www.mycal.net/old/wsweb/img/s7600a.pdf ..to Internet enable a Spectrum. I d…
... , your C preamble code must save ix when it calls asm ... preamble code only has to save iy if it uses it ... /viewvc/z88dk/z88dk/libsrc/_DEVELOPMENT/string/"]string portion of the c library ... and the defined memory map determines where in memory these sections are ...Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…
... that construct is "Piece-of-String.BAS":
[code]
... ,$1D ;B= calculator code for 'VAL'
rst $28 ; ... /> defb $34,$B0 ;stk_data (short string)
defw $023F ;address of ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... , less importantly, which take less memory.
However, ... radix
push de ; save radix
call l0_divu_16_16x8 ; hl ...
; write digits to string
; ix = char ...Comp.Sys.Sinclair Crap Games Competition 2017As the creator of the second-least crap game in last year's competition (and the only mug stupid enough to agree to host it this year) I am proud/ash…
... worldofspectrum.org/forums/discussion/54294/memory-questions]this thread[/url]:< ... array instead and save a bit of memory that way (maybe ... PI, SGN PI and VAL functions thrown in everywhere for ... overwriting the original space in memory with the next block ...Super Wonder Boy antimultiface[url="http://bizzley.com/"]Bob Pape's book[/url] mentioned that Rob Hylands put Multiface protection in Super Wonder Boy. The program can detect whe…
...
2. Likewise, tracking some memory addresses that are known to ... screens. Execute a really long string of #DD or #FD's ... format uses the stack to save/restore the regs, perhaps this ...
