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How do I avoid BASIC becoming corrupted on returning from a M/C routine?I'm having trouble with my BASIC program becoming corrupted on returning from a m/c routine which sets all the registers (including the shadow regist…
I'm having trouble with my BASIC ... corrupted on returning from a m/c routine which sets all the registers ... memory locations when calling a m/c routine from BASIC, and reload them ... -
handy method for passing m/c parametersI knew that a single number or string parameter could be passed to a m/c routine with either: [b]LET a=b+USR address[/b] puts b on the calculator st…
... could be passed to a m/c routine with either:
[b ... similar method for passing two m/c parameters in a utility ... br /> puts b & c on the calculator stack. Unfortunately ... [/b]
puts b=c & d on the ... br /> puts b & c & d on the calculator ... -
Graphic equalizer m.c. program neededBack in the 90's I had a full-screen attribute equalizer that was simple, yet very impressive. We used to listen to Vangelis or Jean M Jarre by conne…
... listen to Vangelis or Jean M Jarre by connecting the tape ... with the code. Since I'm translating this from Portuguese to ... hope that someone who understands m.c. will understand the idea and ... -
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 …
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For someone who knows m.c. it will probably be obvious ... block at 16384 and used M.C. to LDIR the data to ... -
Is it possible to access the +3 disk drive via m/c in USR0 mode?Is it possible to access the disk drive of the +3 via m/c +3DOS calls when running in USR0 mode? I ask because I'm having an awful lot of trouble ge…
... drive of the +3 via m/c +3DOS calls when running ...
I ask because I'm having an awful lot of ... ld ($5b5c),a
out (c),a
ld sp,$9c40 ... ld ($5b5c),a
out (c),a
ei ; interrupts should ... ld ($5b5c),a
out (c),a
ld sp,($9000 ... -
Where's my green square? Basic & m/c question.I'm going mad here - can anyone tell me why my little basic program isn't displaying a green square at the top of the screen? I've checked the num…
I'm going mad here - can anyone ... the basic is overwriting the M/C. I've also gone through ... -
How to read AY Registers from M/C?Gentlemen, I will appreciate if you can provide me some details on this, as I could not find info in other sources. I would like to know if it's pos…
... /> LD BC,ayctrl
OUT (C),D
LD BC,aydata ...
IN A,(C)
but A only ... shows 255. (I'm not expert using IN). I ... -
Fastest fill m.c. routine ever?What is the fastest fill routine you've ever seen? Is there a listing somewhere? Most games and adventures that use fill routines were considered slo…
What is the fastest fill routine you've ever seen? Is ... />
Example of slow fill routine: The one in 'The Hobbit ... searched the forums for 'fill routine'.[/SIZE] -
Looking for cursor routineIt's been a long time since I programmed a little bit in Basic, so I decided to create a simple cursor routine: [url]http://db.tt/SPnSdpx[/url] I k…
... routine, can someone please help me by creating something similar in M.C ... .? Such routine would also be of ... via POKE before launching the routine.
-The addresses where ... right next the last routine byte. That way everything ... -
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…
... ROM would still reference the m/c stack at the old location ... , so this little bit of m/code does the rest.
routine to finish off. It could ... -
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…
... single numeric parameter to a m/c routine, as mc can retrieve numvar ... off again.
* DEF FN m(s$)=USR mc: LET bc ... =FN m(s$): whereby mc can obtain ... -
Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... in any direction, but I'm not being able to find ... please give me an assembler routine that would do this? I ... -
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 -
help with sprites from SevenUpHas anybody got source for a short m/c rountine that can send sprites designed in SevenUp to the screen or to a dummy screen? A long time ago, I wor…
... got source for a short m/c rountine that can send sprites ... , but I'm still not too good with m/c and would like ... to see a routine that can ... was planning to use the routine from basic. -
Calling ROM routinesFirstly, sorry if this is the wrong forum to post this in, but I wasn?t quite sure under which heading is best fitted. I?m trying to figure out how…
... ?m trying to figure out how to invoke the LOOKVAR ROM routine ... table?
All my m/c books are for ?beginners?, which ... -
Scr to vectorBack in 1989 I saw 2 m.c. routines that impressed me. One could convert a certain area of the screen (up to 6144 bytes) to vector images. And the sec…
... in 1989 I saw 2 m.c. routines that impressed me. One ... vector images. And the second routine would read those vectors from ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... ... another noob.
I'm giving my first steps in ... the registers. Now, if I'm going to load several headerless ... registers if I call a routine from the spectrum rom, because ... a better idea of how m.c. works. I still see registers ... -
Why oh why....... did I have to read the thread about cross-assembling using pasmo and ConTEXT......grrrr. Now I've just wasted hours playing with z80 m/c, lol I…
... wasted hours playing with z80 m/c, lol
I do ... display it. Is there a routine anywhere that can do this ... -
Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…
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Briefly, I'm writing an m/c routine to read some BASIC ... in 128K BASIC? (Again I'm working on next month's ... />
I suppose what I'm ultimately looking for is how ... -
Start Tape, Press any key...Hi, I'd like be able to save (program or data or code) using the save "whatever" command, but I want it to start recording immediately, rather than …
... need to use a separate m/c routine or something?
(This ... -
Any BBC aware Specchums out there?After the UK101 and VIC20 emulators I've moved my sights onto emulating a BBC computer. This emulator will be different though in that it will be a Z…
... .
I'm asking if anybody else out ... - writing to Microdrive from m/c. I need to be able ... Does anybody have a windowing routine "they made earlier"? The ... anybody have a fill routine which can fill with an ... I also need a routine which can draw a dotted ... -
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…
... file. I know I'm overwriting important data and that ... be able to run a routine that would allow me ... a very basic understanding of m.c. I know how to ... the binary file that I'm importing. I would then ... For people who have mastered m.c. a screen resident monitor is ... -
Making BASIC occupy less RAM?I risk being told to search the forums and the entire archive of type-ins, but here it goes... Is there any known utility to do all the hard work of…
... include a small machine code routine that would load a BASIC ... , and then a routine in BASIC (yeah, I'm a masochist :P ... POKEs and using another small m.c. routine to save the modified BASIC ... -
Screen to vector?I've found old topics covering this subject and even spoke to Geoff about this, but still want to ask a few questions. I've been playing with vector…
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I'm assuming such routine, either in BASIC or m.c., would have ... -
Character scrollingOk, first I'd like to say that I'm not looking for a complete routine (but that might help) because I am hoping to write it myself and learn a bit mo…
... say that I'm not looking for a complete routine (but that ... learn a bit more about m/c.
What I need ... -speed with maybe a delay routine thrown in. Also, I suppose ... -
Curiosities about .TAP and other formatsI was reading everything I could find about these formats but a couple things are way above my head. Also searched the forums and didn't find any sim…
... is loaded I want the routine to go back to the ... no size limit, but I'm unaware of a way for ... hard drive (HDF) images and M.C.? Ideally I would like to ... -
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 ... : DIM h$(17): DIM c$(68): LET h$(1)=CHR ... PRINT #0; FLASH 1;"m/c setup": LET c$="AF111100DD2A4B5C010600DD09CDC204CDA22D3EFFC5D1DD2A765CCDC204CD2B2DC9":
FOR s ... 67 STEP 2:
LET c$((s+1)/2)=CHR$ FN ... -
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…
... with "1" is a LDIR routine that moves the previously loaded ... "unused" to put a single M/C instruction. In fact, the value ... -
BREAK from GOSUBHere's another one. Just in case you wanted to break out of multiple GOSUB levels with a single command, here's a routine to do it, tested on all mod…
... single command, here's a routine to do it, tested on ... /> LD SP, HL ; 249 ;from m/c stack
CALL $2dd5 ;FPTOA ... -
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 ... (va)-ml: LOAD "m/c"CODE mc,ml:
PRINT "m/c starts: ";mc ...
