-
Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…
... />
So, for example, variable names can be constructed at ... it wrong will give "Undefined variable" or "Invalid argument" or ... 23698
;Indirect Variable Assignment
;PRINT USR indirect ... it must be a string variable or expression
; ... -
Undefine functionHere's a routine to selectively remove variables from the VARS area and reclaim the space. This can be done partially from BASIC already by assigning…
... remove variables from the VARS area and reclaim the space. This ... is held in the E_LINE area (above VARS) rather than ... in the BASIC area, so catering for that as ... de
jr c,CHKNXT ;variable already undefined
jr z ... -
storing machine code in BASICA couple of years ago I posted a routine for storing machine code between PROG & VARS, based on an idea in Toni Baker's "Mastering Machine Code". Thi…
... effectively in the PROG area, because the variable letter for a$() is ... -
editing strings with INPUT LINEHere's the latest in my unpredictable series of utility routines. This one I needed for the SAGE game editor; it emulates INPUT LINE l$ but with the …
... BASIC editor uses the E_LINE area whereas INPUT uses the WORKSP ... area.
[code]
K_CUR: equ ...
jp c,$1c2e ;"2 - Variable not found"
inc ... -
Increasing the number of UDGs...Hi Folks, I know by default the Spectrum can have 21 UDGs (48K) and 19 (128K) and that the address of the bit patterns is pointed to by the UDG syst…
... to by the UDG system variable.
Is it possible ... you could reserve a larger area of memory and point UDG ... -
OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... in UPPER CASE and the variable contains at least one lower ... are also placed in this area before the system variables, freeing ... -
multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width is -
A Miscellany of Dangerous TipsHere's a selection of ideas for using some of the more obscure system variables which I've found handy on occasion. They can be very convenient if us…
... time beforehand. As the DEFADD area is searched before the VARS ... area, this also provides a means ... on return so that the area is no longer referenced.
variable ERR_SP. Evaluating that address and ... -
Enable 128kB paging in emulatorFrom Zx Spectrum documentation ([url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]) [CODE][SIZE="1"]When memory is being pag…
... stack should be in an area which is not going to ... to run, then the system variable at 0x5b5c (23388) must be ... -
Un-PLOTting in the #0 areaHow do I go about un-PLOTting in the bottom 2 lines. I am aware the ROM PLOT routine only works in the top 22 rows, so how would I go about depletin…
Un-PLOTting in the #0 areaHow do I go about un-PLOTting in the bottom 2 lines. I am aware the ROM PLOT routine only works in the top 22 rows, so how would I go about depletin…
analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... ) to indicate a new variable; otherwise, update the relevant ... pointing to that new variable, so any subsequent references ... to that variable before any other variables ... introduced for each subsequent new variable. However, that might be ...Diamond DiggerA collaboration between Dave Pierce 'davepierce07' & Jim Grimwood 'Battle Bunny'. [center][url]http://www.users.globalnet.co.uk/~jg27paw4/pourri/dd-…
... , magenta or cyan)
Walls (variable)
Doors (5)
Keys ... br /> Rocks (50)
Sand (variable)
Bombs (max.7, red ... can decamp into the surrounding area as Spiders. If a Robot ... . This is because the VARS area is pre-declared for optimum ...Emulate Interface One Local Area NetworkApologies if this is a daft question, but are you able to emulate the Local Area Network by running two copies of SPIN (or equivalent)?
Apologies if this is a daft question, but are you able to emulate the Local Area Network by running two copies of SPIN (or equivalent)?Help With AY Music Program in BASICHi, last year I started writing a BASIC program for making and recording AY Music. I thought it would be easier than learning how to use Soundtracker…
... as well as a number variable in 2030
320 LET ... /> 410 REM *** Upper third Menu area ***
420 PLOT 1,140 ...Variable sized tiles /tile routineHow would you do a variable sized tile routine where the tiles have position variables too? Thanks would be interested to learn :)
How would you do a variable sized tile routine where the tiles have position variables too?
Thanks would be interested to learn :)z88dk sp1lib with fzxThe numbers dont seem to display properly? fzx by itself works [quote] // for targets supporting fzx // zcc +zx -vn -startup=31 -O3 -clib…
... ,255};
// Attach C Variable to Sprite Graphics Declared in ... , 'B');
sp1_UpdateNow(); // draw screen area managed by sp1 now
PMs disabled and private area visible.Something screwy has happened, my role has been set to No PM and I can see the private section at the bottom. I can send on old threads but not make …
Something screwy has happened, my role has been set to No PM and I can see the private section at the bottom. I can send on old threads but not make new ones.
Whasgoinon? I'd prefer PMs enabled and not able to see the private area!Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…
... /> -The use of a character variable for fast printing big sprites ... the attack in a certain area...
-When the 7 spare ... retrieved, to leave the main area Brain 8 must jump into ...Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…
... right, setting up the the variable resistors as they had been ... displayed a solid black paper area, on a white border. Although ...My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... being normally resident in that area).
In addtion pages 4 ... top of memory, with a variable starting point making the selection ...games written using game writng programsI was reading through some issues of crash not long back and one article was about some 16 year old that wrote Frank n stein for the speccy(never pla…
... 't clear the status panel area of the screen before it ... there were some sort of variable that says game=0 then ...42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…
... subroutine address into the CHANS area, but this didn't do ... can point the CHARS system variable at your own character set ...MC 101Hello Group Members: Can't spectrum MC be embedded in a BASIC program
... BASIC program area, as pointed to by the system variable PROG, and ...MC 101Hello Group Members: Can't spectrum MC be embedded in a BASIC program
... that by PEEKing the system variable PROG and add on offset ... to access memory in that area. The ULA always wins since ... down. Any program in that area (such as one stored in ...Clone Project feedbackFinally i now have some time to start again with my clone project. I have decided to drop the 48k project and go directly on a 128k clone. This migh…
... down the Z80 in video area access, only for compatibility reasons ... MHz (I tested with a variable frequency generator). For greater speed ... smth instructions in video memory area).
If dual port ...
