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Rst #38This, as far as I know, is the ROM procedure that does the keyboard check. (and, at the same time, is what's being executed by interrupt in IM 1 mode…
... just rely on reading the system variable for results. -
Spectrum Basic InterpreterHello. I started this days a strange project: an interpreter of the Spectrum Basic that can run in a Spectrum. Here is a very preliminar version: […
... the usual in Spectrum, the system variable VARS point to the variables ... CP/M Plus the GSX system can be used, with drivers ... -
Little character trouble with BASinWell, I'm having some trouble loading fonts into the speccy with BASIC, using BASin r13 for an easier job. When I run code, such as this example... …
... then need to update the System Variable which points to the currently ... /> This is a 2 byte variable at 23606 & 23607. You ... -
Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... number held in the CHARS system variable. Then 8 bytes are read ... -
Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…
... of it is used for system variables.
The frame ... for the attributes - 6912 bytes). System variable use is pretty trivial. This ... -
Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... uses the so called "unused" system variable 23681 which holds the high ... -
ZX81 - 64mb queryI know this is a spectrum forum but hopefully someone out there may know the answer to my question. I buy and sell old sinclairs and have sold numer…
I think I would have to say so, yes. Can you try some games on it to see if they work? Or, if you have the manual, see where RAMTOP is set (assuming the '81 has such a system variable)? -
Question about snapshot files....I've noticed that everytime I play "The Boss" (football management) it produces the same scores. I've played the first 5 games 3 or 4 times now and t…
... as the first seed the system variable FRAMES, whose initial value depends ... the seed in the FRAMES system variable. If it generates its own ... -
Du54I've tried using DU54 to write B:game.dsk to A: on +3. But none of the games work, are they all copy protected? On some I got error message "file to…
... motor off and updates the system variable to reflect that, so the ... -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... then leads to stack or system variable corruption which prevents the machine ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... having to repeatedly POKE the system variable to stop the scroll? message ... 1000*(ATTR... part sets the variable that controls the FOR loop ... -
Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…
... might come in useful: the system variable at 23675 and 23676 is ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... keyboard and updating the FRAMES system variable, among other things. Since code ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... of interrupts or by the system Variable FLAGS indicating that a key ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... the [B]LAST K[/B] system variable, that is only gives you ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... the [B]LAST K[/B] system variable, that is only gives you ... IY register points into the system variables area. If you leave ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... [/code]
are special variable declarations unique to z88dk. A ... "normal" integer variable declaration, as in "int ... top of the Spectrum's system variable FRAMES at address 23672. ... located on top of the system variable CHARS. The value of ... -
A challenge thats probably impossiblehere's a challenge for all you coders. Given a snapshot, is it possible to create a program to sniff out the original start address for the game that…
... there's this one little system variable that holds the magic key ... -
A challenge thats probably impossiblehere's a challenge for all you coders. Given a snapshot, is it possible to create a program to sniff out the original start address for the game that…
... there's this one little system variable that holds the magic key ... 't recall there being a system variable that gives us the start ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... " with the help of the system variable CHARS as we did in ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... used was to POKE the system variable which causes the Spectrum to ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... /> [/QUOTE]
Poking the system variable ATTR_P. Interesting. Probably some of ... -
Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... P-RAMTOP (Physical RAM top) system variable is made to point there ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... />
You can poke the system variable DATADD to eliminate all LET ... use two sets of scalar variable instead to save some space ... -
Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…
... top 16k and keep the system variable at $5b5c current with the ... -
Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…
... Basic and not poking the system variable ($5b5c) that tells it what ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... PASS.
n address of system variable NSPPC, simply to save space ... checking.
Initialise variables:- n=system variable NSPPC, put first four player ... -
Poke 23739,111So, I'm looking at some of my old loaders (BASIC stuff) to work out how I got the display to not corrupt on loading code. It's the old POKE 23739,111…
... the value in the CURCHL system variable is put into HL. CURCHL ... -
A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…
... the device to use the system variable that allows handling of commands ... a shadow ROM use that system variable?)
What about race ... -
Testing the Ram on a Toastrack 128KHi All My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the background scr…
... it doesn't touch the system variable (23388 ). However it shows the ...
