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PRINT AT in assembler Hello everyone, I am very new to this forums. Like perhaps many others I had a Spectrum as a child and did pretty much simple BASIC programming, bu…
... to understand the memory layout, system variables and the display file, which ... -
Speed of variables vs. POKE/PEEKGreetings, I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew …
Greetings,
I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew this:
Suppose BASIC encounters a variable reference while parsing. In order to do ... -
Loading Screen ProblemI am putting together files on a tape that my game needs. The problem that I have is that after loading the "loading screen", the image is spoilt by …
... 't use any of the system variables or BASIC (apart from the ... -
Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... available ram and overwrite the system variables, causing a reset if a ... -
Understanding extensions to the BASIC parserFor a while, I've had a rather 'rinkety dink' extension to BASIC via an RST 8 trap in hardware, just so that I can send stuff to a Spectrum over ethe…
... to parse your own command - system variables that must be set, Spectrum ... -
Unprotecting games without knowning m.c.DivIDE or MB02 users don't need unprotected games, but those who still use the Microdrive, Wafadrive, Timex FDD, +3, Plus D, Disciple or use the new …
... and don't overwrite the System Variables and BASIC area.
Channels and streamsSo I've put some thought into channels and streams, and read the dead (and presumably rotting corpse) of the CSS FAQ which contains some information …
... some space, say, after the system variables? (Or would sticking the wrapper ...Suggestion: A new (and simple but good) feature for emulatorsOne slight but real problem with emulators is that when you load a tape file (.tzx/.tap) then the randomise seed system variables are always set to z…
... /.tap) then the randomise seed system variables are always set to zero ... random seed (or any other) system variables always getting the same value ... /emulated, then the random seed system variables could be set to a ...alternate BASIC ROMI've come up with a few patches to the standard ROM to make it use the 128 shadow screen by default. The ROM is reorganised as follows: RAMTOP is se…
... is set to 0xbfff
system variables start at 0x4000
just ... . On the other hand, the system variables have moved so it's ...Please help me complete this lil'programI'm editing Basic programs that were saved in Timex TOS discs, and every load command starts with LOAD *"filename". If I want to go through these pr…
... with 2 values from the system variables.
I could probably ...ZX80 Snapshot queryDoes anyone know why Z80 snapshots store some data as different values? I was initially trying to print the Outlet magazine Outdex files from Master…
... some arcane method of storing system variables, Spectrum Basic, etc, why would ...Jumping to BASIC after importing 23296,1703Sorry for the confusing title. :-D Now that I've learned how to stop a game from starting after loading (in Fuse and Specemu), I have a few more que…
... the way stack, registers and system variables work, but still...
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
... 24000. It stores Basic sstem variables normally and Basic interrupt routine ... still seems to mess with system variables memory area.
What ...Jonathan Cauldwell writes.I also found this in me old archives, which was actually written by Jonathan Cauldwell. Again, typos and editorial tags included for authenticity ;-)…
... , but once the screen display, system variables and other workspace areas are ...Odd keyboard behaviour due to a single bit failure in +3 ROMI've just fixed a spanish +3, which, among normal issues (drive belt missing), presented a very strange one: the keyboard autorrepeated without a del…
... 23561 and 23562 (the two system variables that are responsible of autorrepeat ... region called K-STATE in system vars).
Apart from ...Converting 50ths of a second to hours, minutes and seconds...Hi Folks, I have written some code to convert the interal Spectrum clock from 50ths of a second to hours, minutes and seconds. The following code s…
... returned from PEEKing the three system variables in 50ths of a second ...Return to +3 BASIC from 48K mode.Hello Spec-Chums! I don't know if this trick has been posted before, if it has, i apologise, but i have not been able to find it. Anyway, here goes…
... found that provided the new system variables in the former printer buffer ...New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... PCs running the Windows operating system. Its role is to compress ... plenty of space for the system variables and BASIC program area. The ...A Rare Spectrum BookA rare Spectrum Book has been recently uploaded by JP - The Guide to the Spectrum ROM by Andrew Pennell [url]http://www.worldofspectrum.org/infosee…
... and accurate list of the System Variables and rather spookily he anticipates ... that the NMIADD system variables will be used to extend ...The INPUT command routine ($2089)I was looking at the INPUT routine with a view to modifying the intro so that I could pre-load the workspace and edit an existing value, rather than …
... a 'LINE'.
All the system variables have to be reset before ...Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …
... Using PEEK to examine the system variable P-RAMT produced 32767 ... every time. Once the system had initialised it could run ... upper RAM. I assume that system variables and data structures etc. were ... upper RAM, but the system later crashed because these were ...More RAM for BASIC (ZXSE required)Ok, here it is: [url]https://dl.dropbox.com/u/15659782/48KBASICSE.zip[/url] Use it as an IF2 ROM with a ZX Spectrum SE. It's a version of the 80x2…
... . However, anything that expects the system variables to be in their normal ...Varios +3(e)DOS questions?I'm converting tape games to disk, for being used in my +3e. I'm trying to convert them to standard BASIC loaders, so files could be copied using BAS…
... keep the printer buffer and system variables intact? When doing a read ...What's the POKE that removes the Start Tape message when saving?I'm sure there is one... you could POKE one of the system variables and when you SAVEd it would do it without the pause and the Start Tape message. …
... could POKE one of the system variables and when you SAVEd it ...128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…
... ix,23552 ; start address of system variables
ld de,4000
system vars to a total crash ...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…
... guarantee the state of the system variables AND as I am using ...Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
How do you go about changing PAPER and BORDER colours from machine code?
I've forgotten the system variables for border and paper.JHCon 2014Hello, not sure if this is the right category but JHCon 2014 will take place[B] from 28. to 30.11.[/B] at usual place - gymnasium in Jindrichuv Hrad…
... POKEs to call system routines in ROM or set system variables are allowed ...
