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ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... some loaders for 128K games , that expect certain system variables to exist and ... the 48K ROM , so these variables don't exist and the ... different banks to load a 128K game
In ... address 23388 (sysvar BANKM on 128K machines ) just before doing the ... -
Question - SAMS Timex Sinclair 2068 Beginner/Intermediate GuideHi all, I just acquired a T/S 2068 and the a book that came with it is, SAMS Timex Sinclair 2068 Beginner/Intermediate Guide. On page 18 of thi…
... reserves more space for the system variables for future expansion and pushes ... spectrum games to my disk system and found maybe 4-5 ... which is similar to the 128k spectrums.
There are ... -
Line DemoI was looking in the source code of another game (that Akalabeth game), with lots of line drawings. The difference was that they don't use the PL…
... small question then, with the 128K and further versions, is it ... the RAM switching during the 128K editor mode? Or does it ... reserving some space between the System Variables and (CHANS). The latter method ... -
Creating a POK from RAM or binary.Don't know if this is the right category or not but here goes. I'm working on a bug fix for a game, it's a few hundred bytes worth of custom code …
Going 128k have at least two side effects:
1) some people having real machines can't use it
2) you must be careful, if game uses system variables or basic area -
how to load machine codeI'm reading Jon Caldwell's how to write Spectrum games but can't enter the code! Here's an example:_ LD BC, (score) Call 6683 I tried putting…
... of things. This is the 'SYSTEM VARIABLES' area. It also sets ... first 6.75K, then the system variables are stored, then the ... about the UDGs and the system variables and just use that ...
Other machines (like the 128K Spectrum) can electronically 'page-in ... -
how to load machine codeI'm reading Jon Caldwell's how to write Spectrum games but can't enter the code! Here's an example:_ LD BC, (score) Call 6683 I tried putting…
... of things. This is the 'SYSTEM VARIABLES' area. It also sets ... first 6.75K, then the system variables are stored, then the ... about the UDGs and the system variables and just use that ...
Other machines (like the 128K Spectrum) can electronically 'page-in ... -
Clever, yes. Useful? Not so sure. Re: LOAD ""CODE gamesI was always curious about how the (few) games that require that you type LOAD ""CODE, rather than the usual LOAD "" worked, but only just now decide…
... is the program and user variables (if they were defined).
variables, they won't be as ... ) unknown.
- You can alter system variables so BREAK won't work ... utilties on 48k computers (but 128k copiers could do, and it ... -
The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... memory and opted for overwriting system variables (saving the $5B5C var elsewhere ... the printer buffer), but on 128K machines, that’s exactly where ... , it differs slightly between a 128K/+2 and a +2A/+3 ... -
The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... from pietro bros). Many game variables will be up there. As ... all works on a regular 128k so the problem won't ... memory and opted for overwriting system variables (saving the $5B5C var ... is not saved to the system variables. Instead if something needs tracking ... -
Testing an Interface 1As title, is there an easy way on how can I test to see if its functional or not please ? :) Please bear in mind I do not have *any* microdrives n…
... difference by reading the appropriate system variables.
Doing the above ... One.
48K, plus, 128K and +2 (in a grey ... -
Tape to +3 disk transferWhen the first basic part was merged from tape, to be saved to disk, and it looked like this: [img]https://i.imgur.com/UQx1hc2.jpg[/img] how di…
... is where every 128k has the paging routines), system variables and BASIC areas ... won't work in a 128k.
Using the pc ... -
New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
...
and for 128k:
1) Directly ... and page/bank 7 for system variables, the Stack & 3DOS ... off.
Useful for 128k snapshots with erroneous data in ... /> 3: force 128k. Overide automatic 128k-48k conversion if extra ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... printer buffer to store some variables but doesn’t initialize them ... data in 128K mode. The game also overwrites the system variables area, making ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... printer buffer to store some variables but doesn’t initialize them ... data in 128K mode. The game also overwrites the system variables area, making ... -
Max RAM for ZX Spectrum gamesHow much RAM can be used for single level/whole game? On tape writing.
... access.
In the 128K models, the ‘lower’ 16K which ... on the machine is a 128K toastrack, +2 (grey) or a ... ROM code, then the BASIC system variables, it’s workspace and maybe ... -
Memory usageBrowsing the online documentation for the Spectrum I came across a peculiar discrepency. As we all know the start of the RAM is at 16384 which is whe…
... 23296. After this we have system variables.
From my old + ... I already knew that the system variables the +3 ROM used started ... 48k and found that the system variables start at KSTATE, 23552, ... such a gap unless more variables were planned for paging - ... -
BASin Release 6 available for DownloadHi all - It's another cut'n'paste from CSS :) I've been tapping away again, and seeing as a couple of people have recently seen BASin's latest bits…
... , examine and edit your variables at runtime, add watches ... hex editor.
Added System variables viewer/editor
Added ... you can now watch sysvars, variables (faster than an expression) ... 499999999999)
Added the Variables editor. I did say " ... -
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 ... -
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 ...
