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Flood FillHi Folks, Can anyone point me to a flood fill that I can call from ZX BASIC? I have looked through the archive and although there are posts about…
... that can be called from basic:
[code]
;; ... ,0
ret nc ; return zero to basic if ok
inc ... c ; otherwise return non-zero to indicate ... -
Help! I'm learning Machine Code...Having decided to take the plunge and learn to machine code a while ago, I have started in earnest using the much recommended 'Mastering Machine Code…
... it in BC before you return. It's a bit fiddly ... into BC, and on returning to BASIC, that value will appear as ... into a routine too. When BASIC calls machine code, the address ... 'initialise' function return the address in BC of where to POKE your ... -
(Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…
...
foo:
...
ret ; return to address on stack which is ...
baz:
...
ret ; return to address on stack which is ... approach myself, it avoids sacrificing registers:
[code]
... -
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... CALL addfunc ; this pushes the RETurn onto the stack
LD ... to BASIC
addfunc
POP HL ; recall the RETurn ... /> PUSH HL ; put the RETurn address back on the stack ... br /> RET ; and then RETurn, POP the address off the ... -
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... addfunc ; this pushes the RETurn address onto the stack
to BASIC
addfunc
POP HL ; recall the RETurn ... HL RETurn address
[/code]
(remember to bung ... POPped HL is the address to return to, so there is no ... -
ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... into RAM to run first, then return to Bank 0 to finish off ... does need the regular ROM to be present. It checks ... the ROM to test the version of the ... machine to do the colour timing. ... ROM could be copied to the BASIC area, and the screen ... -
ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... copied into RAM to run first, then return to Bank 0 to finish off ... from ROM could be copied to the BASIC area, and the screen ... beginning of your code to switch back to internal rom.
to change to internal rom.
< ... -
Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... 0x5B45 PUSH BC ; with the return address (ROM)
0x5B46 ... BC ; Preload stack with return address
LINE-END: ... ; REPORT-C - Nonsense in BASIC (ROM)
;Handle CLEAR ... /> 0x5BFA JP (HL) ; return to the previous stack's ... -
Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... when first getting something to run. But it doesn ... to BASIC, and particularly Sinclair BASIC, machine code is going to be ... typical beginner's approach to clearing the screen is ... to deal with situations that require more storage than there are registers ... -
Accessing +3 DOS with DivIDE enabledI'm thinking about making a tool that copies files from a FAT partition to a IDEDOS partition. Currently, I've got two problems: - Getting the ESX…
... /> - Gatito2: It tries to use dos_init to initialize +3DOS, then read ... option (or loading from 128k BASIC): every program works.
... Note that it doesn't return an error, it crashes ... ". They may crash when returning to BASIC.
Also, some ... -
So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…
... ' for the 128 BASICs to enter the 48K ROM and ... a 48K speccy, and then return to the 128K ROM. By ... the first 128K BASIC didn't have to copy all the ... many different routines that BASIC relies on, to the new ROM, ... which i'm beginning to use quite often in a ... -
RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... , COPY, NEW, REM, RETURN, STOP and the functions which ... altered like this before returning to BASIC:
[code]
... (for RE_ENTRY)
ret ;return via $3365 RE_ENTRY
[/ ... can be used to get USR to return a string rather ... -
RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... ,201 and it will return safely (and print the ... , and there are some options to do:
... runing some unintended line of BASIC.
- RANDOMIZE will ... some effects if your BASIC uses RND after that ... you won't be returning to Basic (like most games), ... -
UDG generator doesn't work, why?Typing in the UDG generator from the manual I get integer out of range when I run it. I'm going nuts trying to figure out whats wrong. Can someone pl…
... haven't a clue about registers, stacks,interrupts etc. etc. ... or forum for me to ask my basic Basic questions?
... My first experiment was to program ... poss I'd rather stick to Basic even if it does take ... -
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... USR addr. to BC
ld hl, 2D2B ; return address is ... USR addr. to BC
ld hl, 2D2B ; return address is ... af ; restore state and back to basic
push hl ; push ... -
THE LIGHTBULB EFFECT You know what that is? Like how cartoonists depict a bright idea by drawing a lightbulb over the head? When I was trying to work out the lengt…
... so no return value has to be stored in BASIC or something ... engineer was creating the BASIC command they would ... , you need to use a BASIC method that accepts ... the chance to return a value from code to BASIC I guess ... .
I have to ... -
THE LIGHTBULB EFFECT You know what that is? Like how cartoonists depict a bright idea by drawing a lightbulb over the head? When I was trying to work out the lengt…
... engineer was creating the BASIC command they would ... code, you need to use a BASIC method that accepts ... the chance to return a value from code to BASIC I guess ... in order for Sinclair BASIC to work with it (because ... have had a BASIC with just POKE to do everything, ... -
Scart Leads for spectrumHi, I was going through my stuff the other day and found I have all the bits for making spectrum scart leads. I was going to ebay them but thought …
... an unoiled chainsaw trying to cut through concrete). What ... text in the "+3 BASIC" bar distorts so it ... I can see it return to normal over about two minutes ... limited use to me, whereas a Spectrum-to-composite (i ... 's RGB/Peritel socket to the red/white/yellow ... -
c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…
... thing would be to make loader from BASIC, so that ... follows:
BASIC loader could look like this ... ldir everything from #5B00 to #5FFF to upper third of VRAM (which ... - enable interrupt
- return correctly to BASIC, so it will continue with ... -
Serious facts about the ZX Spectrum Serious fact Number 1: It is a business machine. From an article about and interview with Sir Clive ( by Mike Cowley) Sir Clive says here:-"Nor…
... for another Sinclair machine only to discover emulators. Hooray!
... again as before mainly thanks to gamers and I very ... However the fun of Sinclair Basic (having used it for the ... here today[/i]
but to return to the point...
... -
are there any machine code to basic converters?i know it sounds stupid but for amature programmers like me it would be great. i could speed up the basic on an emulator and it would give me more of…
... conversion where assembler registers would be Basic variables so INC ... or so and convert it to Basic this way. Commercial games ... we converted their code to Basic this way the result code ... be much bigger as each Basic instruction using variables, numbers ... -
Komando 2 incompatible with the +2A models, anyone could supply a poke or a loader to make it work?http://www.worldofspectrum.org/infoseekid.cgi?id=0002734 Is any way to make it work in the +2A models with a loader or poke? Thanks!
... directly, from BASIC, because memory that needs to be poked, ... />
To be successful, you need to run the assemblycode ... Or you could make it return back to BASIC after decompression, do the ... poke in BASIC, and then ... -
hacking controls for atic atac?I was wondering if there is any way to hack in game controls? In particular for Atic Atac. I prefer to use keyboard controls for most games, but the …
... loaded this and restored the registers and set the PC.< ... routines instead, which then return to where the original routine did ... part where I changed KEYBOARD to KEYBOARD/REDEFINE does this - ... , and patched the sysvars to point to their custom font. I ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... keyboard was a pig - why return to that?!?... Its perhaps not such ... I still like to type out the odd basic program from time ... to time... The other thing ... Exodos commands typed from 128k basic... For those of us who ... -
Re. new Spectrum Hardware :What are the advantages and disadvantages of Crowdfunding for WOSSERSIn other words who and how does it help?
... sense.
The basic idea is that :- Repeat business ... customers and they will return to the same show next ... of fame" offerings have to create sustainable and profitable businesses ... .It also encourages companies to release underdeveloped and "half ... -
Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…
...
ret ;Return to calling function. 'A' still holds ...
Remember when you RETurn, the registers aren't changed (well, ... and PUSHes the address to return to onto the stack. When ... to just leave them in registers) is first POP the return ... -
Help with adding graphicsHi, After like 20 years or so I started playing again with Spectrum stuff, especially programming. I tried to dig into machine code, but apart f…
... , eventually I managed to code a little game in BASIC. Here it ... CHARS and UDGs to alternate sets and then returning to BASIC.
I ... CPU monitor (to see the registers) and a way to step through the ... -
BREAK key on 128k SpectrumWhat happens when BREAK is pressed on a 128k Spectrum? Why is it different from what happens on a 48k Spectrum. Is there a way to disable it or to …
... 's an example of a BASIC error handler which is called ... change the error return to point to my routine or to restore the original ... on the machine stack pointed to by ERR_SP. The loop at ... -
How to stop a flickering character erasure?I'm trying to figure out how to build a moving sprite. Eventually it will be made up of several UDG's. However its early days yet so I'm experimentin…
... a Next to be able to run an extended BASIC when there ... a RETURN, at least not if you want to use ... haven't requested not to) of the variables that ... procedure, and have them return to their original values on exit ... TO ax,ay TO bx,by TO dx,dy TO cx,cy TO ex,ey TO ... -
Why do we do it?I was sitting down thinking just now, why am I so into this Spectrum retro scene thing? Better than that why are there so many of us into the retro s…
... /> Birthday parties was an excuse to have friends revolving around it ... Christmas was the right time to ask for a long sought ... .
It was accessible, basic was easy to pick up, and there ... part I can always return to. Whenever I want to, trouble free, good ...
