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PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…
recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …
... any quicker than the DEF FN method anyway (which was the ... gone back to using DEF FN (...)=USR ... to call the routine, looking ...im looking for a fill routine written in basici know this would be slow but i want to tinker with it to produce something else.
Yeah, it is slow. The original book had a FN USR replacement for PLOT that sped it up quite appreciably. That said, I use SpecBAS these days so speed isn't an issue for anything really.Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…
... , thus ensuring that the USR call returns the required decimal ... the end, so that "USR nnnnn" can be used in ... method to return from a USR call with a floating ... pointers to be returned from USR calls. Refer to the ... /> 9999 LET t1=FN t(): LET t2=FN t(): LET t0= ...Randomize USR xxxxxA weird topic: When I was a kid I use to mess around with the RANDOMIZE USR xxxxx, sad I know!!! For instance RANDOMIZE USR 51234 would give me a loa…
... mess around with the RANDOMIZE USR xxxxx, sad I know!!!
For instance RANDOMIZE USR 51234 would give me a ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... to start it by RANDOMIZE USR xxxxx. Which parameters should I ...POKE, PEEK and RANDOMIZE USRAnyone got a store of useful POKES, or RANDOMIZE USR statements with interesting effects? As a start, try anything from RANDOMIZE USR 1216 to RANDOM…
... of useful POKES, or RANDOMIZE USR statements with interesting effects?
USR 1216 to RANDOMIZE USR 1327. This should ...New Functions for Sinclair BasicA total of 52 new functions can be added to Sinclair BASIC; 26 numeric functions (A-Z) and 26 string functions (A$-Z$). Owing to the internal structu…
... AND INT FN V(FN V(FN V(FN V(FN V(FN V(FN V(x ... ),2)+INT FN V(FN V(FN V(FN V(FN V(FN V(FN V(y ... )+STR$ INT (FN V(FN V(FN V(FN V(FN V(FN V(b,128 ... )+STR$ INT FN V(FN V(…'usr 0 mode'Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?
Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?Those RANDOMIZE USR lines that look like tape loading...I often see on here people mentioning those RANDOMIZE USR lines which when entered, seem to simulate a tape loading, with the colours and lines in th…
... here people mentioning those RANDOMIZE USR lines which when entered, seem ... first ever found was RANDOMIZE USR 1280 which shows blue and ...DEF FN DirectivesI am looking at using some machine code functions from the DK Graphics Pack. They are machine code but they are called via Basic with the function de…
... function defined such as DEF FN g(x, y, p, q ...BASIC Keyword ReferenceRealised that the Sinclair Basic section would be a better place for discussion of BASIC keywords, so for reference the old thread is in [thread=2005…
... K : T
DEF FN : E : SYM + 1 READ ... RUN : K : R
FN : E : SYM + 2 SAVE ...
LEN : E : K USR : E : L
LET ...BASin r14d - Final bugfix for the r14 seriesOk, there's not a great deal to "show" here, as most of the work has been going on "under the hood" so to speak. And there's been a [i]lot[/i] of wor…
... )
Fixed - Some evaluations (like USR 7962, the "free RAM" routine ... - GO TO, GO SUB, DEF FN etc. (Ref)
Fixed - You ... core, so a lot of USR xxxxx expressions no longer screw ...Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…
... />
I know that USR 0 simply causes the CPU ... advantages for the program does USR 0 mode offer over ... program that might require a USR 0 style setup) could, ... place, and do whatever else USR 0 mode does, then ... on the user to type USR 0 before running the ...Help! USR 0 mode?Right, first of all, I know that this is in the wrong forum, and secondly it's maybe against the TOS anyway, as it's just asking people to read and p…
... />
I've asked about USR 0 mode, and whilst I ...Randomize usrHi, I've often wondered why/how they came up with RANDOMIZE USR <memory address> to invoke machine code couldn't they have used a better keyword (e…
... came up with
RANDOMIZE USR to invoke machine code
I read somewhere that USR is the keyword that executes ...Usr 0I have noted there are some games / applications / demos which have to be loaded in USR 0 mode on a 128K Machine ("Randomize USR 0" in 128K BASIC the…
... have to be loaded in USR 0 mode on a 128K ... Machine ("Randomize USR 0" in 128K BASIC then ... is the case, and what USR 0 actually DOES?Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…
... , it's apparent that the USR entry point is not 30000 ... do I work out the USR address to start the machine ...problem with DEFADD storageI have a function: DEF FN t(t$,m,t)=USR t which is called with, for an example: LET bc=FN t("t$()",mcworkspace,mcputt) where, at the time: mcworkspac…
... a function: DEF FN t(t$,m,t)=USR t
which ... , for an example: LET bc=FN t("t$()",mcworkspace,mcputt)
USR routine is therefore not working ... function to be simply: DEF FN t(t$,m,t)=m ...Can you improve this recursive DEF FN?I came up with this function to scan strings for characters without needing to use FOR...NEXT and IF...THEN, but it seems rather long-winded. Can any…
... />
Using:
DEF FN w(w$,o$,c)=VAL ... (("FN w(w$,o$,c+1)" ... />
with:
w$(FN w(w$,o$,1))
FN w(w$,o$,1)*100).RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
... I "discovered" a strange RANDOMIZE USR. This is it:
... [b]RANDOMIZE USR 46578[/b]
USR in an emulator in ... happening here. The RAND USR proposed just begins executing ... parameter for the RAND USR, the pattern doesn't ...fn bug in basin?Hi. I was just trying to make myself some functions in basin and when i tryed them, the progam stopped on call. So i've tryed this simple thing: 10 …
... thing:
10 def fn a(x)=x*10
20 print fn a(10)
and ...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 …
... "):
DEF FN b(h$)=16*FN n(h$(1))+FN n(h ... $(2)):
DEF FN g ... /> 9991 LET prog=FN p(23635): LET vars=FN p(23627):
FN g(l)+CHR$ FN h(l):
... RANDOMIZE ap: LET bc=l+USR (vars+29): STOP
9996 ...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(…
... !
40 PRINT FN f(FN f(2,FN g(3,1)),4 ... !
50 PRINT FN f(FN g(2,FN f(3,1)),4 ... !
60 PRINT FN f(FN g(2,FN g(3,1)),4 ... !
70 PRINT FN g(FN f(2,FN f(3,1)),4 ... !
80 PRINT FN g(FN f(2,FN g(3,1)),4 ... !
100 PRINT FN g(FN g(2,FN g(3,1)),4 ...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…
... as 'b']
. eg. FN f("z$()","b",find) -or ... with value 'b'
. eg. FN f("z$()","wxyz",fill) -or ... 'b' (may overlap)
. eg. FN c(22528,22529,127,CHR ... /> "PRINT USR r0,p1[,p2...,pn],r1" or "DEF FN f(p1 ... [,p2...,pn])=USR r1"
with ...BASin v.15 DEF FN bugThe bug would appear to be in "BASSupport.pas : Procedure ProcessDEFFN"; as it's not inserting the 6-byte variable place holder after each parameter …
... each parameter in the DEF FN definition. There's code there ...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…
... be:
* PRINT USR mc,s$;: but that needs ... /> * DEF FN m(s$)=USR mc: LET bc=FN m(s$): whereby ... /> * RANDOMIZE CODE "s"+USR mc: but that needs some ... syntactically incorrect "RANDOMIZE s$+USR mc"? I was wondering ... like "RANDOMIZE LEN s$+USR mc" might leave s ...
