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Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... tile based rendering and scrolling routine.
It draws in ... as a test of the routine it serves it's purpose ... result in DE for draw routine
draw_tile ld hl ...
ld (position_var),hl ; Reset print position
ret
saving part of a BASIC programHere's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to …
Here's a short routine to save part of a ... $(2 TO 11)=" " THEN
PRINT #0;"F Invalid file name ... +CHR$ 128+l$
9994 PRINT #0; FLASH 1;"m/c ...AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... So here's a routine to provide all of the ... 7
19 PRINT "OpCd A"
20 PRINT "CPL ";a,"= ... +VAL "(,a"
23 PRINT "RRC ";a,"= ";USR 40021 ... +VAL "),a"
24 PRINT "SLA ";a,"= ";USR 40021 ... +VAL "{,a"
33 PRINT "RR ";a,"= ";USR 40021 ...FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…
... with FN functions that call assembly, I've found something ... REM fail!
40 PRINT FN f(FN f(2 ... ): REM works!
50 PRINT FN f(FN g(2 ... ): REM works!
60 PRINT FN f(FN g(2 ... REM works!
90 PRINT FN g(FN g(2 ... ): REM works!
100 PRINT FN g(FN g(2 ...Find-Fill-Copy functions for BASICThere's not much going on here, so here's three m/code routines to provide some data manipulation functions which are otherwise slow to do from BASIC…
... two versions of each routine, using either:
"PRINT USR r0,p1 ... fixed point then the 'initsr' routine can be discarded (this alters ... assembler listing is so that routine addresses can be calculated by ...tiny routine to shift RAMTOP & stackCompressing some data areas above RAMTOP and wanting to make the released space available for BASIC arrays, I needed to move RAMTOP without using CLE…
... last segment of the CLEAR routine to finish off. It could ...Print Screen not Working on Windows 7I know I know this is chit chat and not a tech support forum. I ask here because the info on the web about this issue is generally shyte. I'm asking …
... the feature of pressing the "Print Screen" to commit the current ... but screen dumping via the print screen feature does nothing.
print screen key on this laptop ... how can I restore my print screen feature, I've tried ...Problem with a small basic routineDear all; I have been messing about with a routine (originally published in Your Computer 1982, by Tim Langdell). The idea of the program is to simul…
... been messing about with a routine (originally published in Your Computer ...The short blocks loaded in Jet Pac(Hope this have not been previously discussed. If so, my apologies) Is there any reason why Jet Pac loads three short blocks after the main block? I…
... one single LOAD ""CODE 24572 : PRINT USR 25067, the game starts ... with "1" is a LDIR routine that moves the previously loaded ... ""CODE 245772: POKE 23728,233: PRINT USR 25067
Alternatively ... ""CODE 245772: POKE 25457,233: PRINT USR 25067Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
... 's a short routine to manage printing ... ;JP address
;PRINT USR stack,string_expression,max_length,substr ... inc b ;don't count print controls
PRCHAR: rst ...
rst $10 ;print a character
pop ...Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…
Here's another wacky routine. This allows assignment of values ... 20 NEXT a
30 PRINT valA'valB'valC
31 ...
The syntax is:
;PRINT USR indirect,arg1,op,arg2 ... />
;Indirect Variable Assignment
;PRINT USR indirect,arg1,op,arg2 ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... routine method of a screen buffer and when I finish to print ...Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
So... finally I?m studying Assembly Z80... after 36 years. :)
... to make a game using Assembly?
I bought a book ...Undefine functionHere's a routine to selectively remove variables from the VARS area and reclaim the space. This can be done partially from BASIC already by assigning…
... ; eg.:
[code]
PRINT USR undefine,"a","bbb","c ... FOR z=first TO last: PRINT USR undefine,z$(z);: NEXT ... /> RECLAIM2: equ $19e8 ;ROM routine RECLAIM_2
SCANNING: equ $24fb ... from BASIC by:
;PRINT USR undefine,"arg1"[,"arg2"...,"argn ...Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... know of a simpler/quicker routine that will clear the screen ... the ATTR P settings, reset PRINT AT without all the fuss ...storing machine code in BASICA couple of years ago I posted a routine for storing machine code between PROG & VARS, based on an idea in Toni Baker's "Mastering Machine Code". Thi…
... years ago I posted a routine for storing machine code between ... changing. To resolve this the routine assigns DEFADD to the display ... DEF FN statement, so the routine works even though some of ... /c"CODE mc,ml:
PRINT "m/c starts: ";mc'"NOT ...DATA vs PRINT and OVERjust messing about and came across this alternative way of drawing a map....now before I start mucking about with my actual program.....is there any …
... any better than a simple PRINT instuction?
10 ... =1 TO 3: READ a$: PRINT AT m,1;a$: NEXT ... present etc
Would PRINT OVER be any use on ...more on storing mazesPrompted by Wookiee's escapades, I've been pondering on how to use DATA statements directly for displaying background graphics, thus avoiding the dup…
... tokens;
* numeric parameters following print controls use characters "?" to "?" ... needs a short m/code routine), after which it can be ... graphics string;
* to print a background just set 'm ... a
REM print each DATA statement as m ...BOB the Screen BuilderHere's my first attempt to use that tokenising idea from "more on storing mazes" in a screen designer - "[url=http://www.users.globalnet.co.uk/~jg27p…
... used in the game to print the screens directly from ... the print controls in the DATA lines.)
The routine at ... an independent program segment saving routine. It just saves selected ranges ... to go through its exit routine to restore things; just enter ...Using Boriel's ZX Basic to learn assemblyI wrote a small guide. Hopefully some people will find my gibberish useful - especially people looking at first steps in machine code, where I think …
... /tutorial-how-to-put-inline-assembly-functions-into-zx-basic-t729 ...Game over routineA few years back I remember a routine that printed 'game over' or other message randomly all over the screen in different colours. Think it was out o…
A few years back I remember a routine that printed 'game over' or other message randomly all over the screen in different colours. Think it was out of YS, but not sure.
Anyone remember what it was called or where I could find it?The INPUT command routine ($2089)I was looking at the INPUT routine with a view to modifying the intro so that I could pre-load the workspace and edit an existing value, rather than …
... was looking at the INPUT routine with a view to modifying ...Memory move routine?Hi Folks, I have been searching for the thread that covers the memory move routine that uses a$=b$ via DEF FN. I thought it was written by Battle B…
... that covers the memory move routine that uses a$=b$ via ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... it provided instead a routine to directly print tiles on screen (if ... , and AFAIK gasman invented the routine to render 18 multicolor columns ...Interview with VERONIKA MEGLER ("The Hobbit" programmer)This interview with Veronika Megler (The Hobbit) has been published by elmundodelspectrum.com in Spanish, I copy it here for you all in its original …
... ?d call Phil?s graphics routine and his code would draw ... some time period, it would print ?time passes?, and then all ...Model Railway Timetable Version 1.4.12.0313...Hi Folks, Since November 2010 I have been working on my [B]Model Railway Timetable [/B]software. Thanks to the considerable help and patience of yo…
... of WOS:
* Proportional print routine (Tony Samuels)
* Memory move ... routine (Battle Bunny)
* New random ...Learning to program in AssemblyI hope Im posting in the right place. My question is what is the best way to start learning assembly on a ZX Spectrum. I've done some simple assemb…
... best way to start learning assembly on a ZX Spectrum. I ... 've done some simple assembly on a DSP chip and ... or software used to enter assembly language and to save it ...simplest method to pass a string to m/code?The statement "RANDOMIZE numvar+USR mc" is a simple way of passing a single numeric parameter to a m/c routine, as mc can retrieve numvar from the to…
... parameter to a m/c routine, as mc can retrieve numvar ... I know would be:
* PRINT USR mc,s$;: but that ...Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... an interrupt mode 2 service routine and uses POP and PUSH ... routines to print to the buffered display and the routine will
routine, not even as developed as ...
