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CLEAR does not RESTORE the DATA pointer??According to the Spectrum manual, one of the things that a CLEAR command does RESTORE the DATA pointer. Either it doesn't actually do this, or some…
Graphics in Basic??What is the fastest way to draw high rez graphics in Basic. Andrew.
... spectrum manual, the chapter entitled "system variables". This is the place to ...Programs detecting Spectrum modelsHi. I'm curious about knowing how some speccy games detect if they are runnning in a 128k or 48k model. What tricks can be used to make this in a Spe…
... non-basic (hence not requiring system variables) version of woody's code ...Alittle pic of the two different rubber key mats Grey and BlueAnd they are naked too :o Can someone please post a pic of one of the supposed faun coloured speccys i am desperate to see one :) [url]http://www.s…
A very early Spectrum should have the very early manual.
Check out page 176
[url]http://gwearmouth.googlepages.com/p176.jpg[/url]
which mistakenly uses ZX81 system variables in the final programs.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…
... reading/writing anything to/from system variables nor having any regard to ...Some things I bet you didn't know about Microdrives...Quote: This can be attached to any 16k, 48k, & 128k Spectrum Computer, it always for increased performance, and more detailed BASIC code. The Micro …
... . It is true that the system (and this is an Interface ... makes use of the NMI system variables NMIADD but no Sinclair hardware ...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: […
... a jump table with few 'system' calls, that way the porting ... is the addresses of the system variables, actually is hardcoded but another ...Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... so that you can have variables or equations as parameters.
system variables area) and HL' (for some ...Saving MCI want to save some code from memory with, for instance, SAVE "aname" CODE 40000,500 But I want it to load to 32768 with the LOAD "" CODE command (no…
... . (If it is, save the system variables somewhere else and restore them ...16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.
...
There are two other variables that the MicroSource understands:
variables (e.g. after compilation ... you can use BASIC variables directly in the assembly code ... 1 can set up its system variables. Just type FORMAT without ...Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
... machine (checked RAMTOP and UDG system variables) even though I know it ...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 buffer ... for the attributes - 6912 bytes). System variable use is pretty trivial ...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…
... ] use the Printer Buffer and System Variables area, they are just not ...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…
... '[B]ZX IF1[/B]' extra system variables are initialized when an error ... ]CLEAR #[/B]' command but the system variables can only be removed by ...Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... ROM code involved with updating system variables is executed. So how can ...Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... ROM code involved with updating system variables is executed. So how can ...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…
... is paged in and that system variables are created in a bug ... only either initialize the extra system variables or close the specified stream ...List of POKEs and PEEKs/cool memory addressesI was wondering if there was a list of cool memory addresses to POKE and/or PEEK. For example, I know that PEEK 23674 tells you how long a Speccy has…
... actually pokes that change the system variables or something in a Basic ... poked. It could crash the system.List of POKEs and PEEKs/cool memory addressesI was wondering if there was a list of cool memory addresses to POKE and/or PEEK. For example, I know that PEEK 23674 tells you how long a Speccy has…
The system variables area provides the most interesting ... .
Full list of system variables and descriptions can be found ... .g. changing CHARS or UDG variables to point to a user ...Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …
... it in one of the system variables but that will only work ...How did games started with LOAD "" CODE auto-start?Some early games (l remember for example [B]Galaxians[/B] from 1982) was loaded with LOAD "" CODE, which in one single block first loaded the loading…
... /> Simply put, Galaxians loads the system variables as well as the program ... , and included in these variables is the one for "jump ...How did games started with LOAD "" CODE auto-start?Some early games (l remember for example [B]Galaxians[/B] from 1982) was loaded with LOAD "" CODE, which in one single block first loaded the loading…
Since this trick is done while BASIC interpreter is running, we don't need to store registers. BASIC system variables are enough. Anyway, loading and saving procedures scratch most of registers.How did games started with LOAD "" CODE auto-start?Some early games (l remember for example [B]Galaxians[/B] from 1982) was loaded with LOAD "" CODE, which in one single block first loaded the loading…
Point is in loading system variables - there are those for jump ... />
Little harder is loading system where stack is overwritten - it ...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 ... IY register points into the system variables area. If you leave the ...Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... all of a sudden, the system variables are going to go away ...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…
... is usually just after the system variables area about 24000 or so ...Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... see on the screen, the system variables and in the case of ...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 ...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 …
... checked the purpose of these system variables, but I still don't ...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 …
... checked the purpose of these system variables, but I still don't ... . The address yields the BASIC variables memory start address. So it ...
