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SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ld hl, mem_5_1 ; second byte of mem-5
ld ... base address of number
add hl, bc ; last byte of number to ... pf_rnd_lp:
dec hl ; last byte of number
ld a, ( ... add hl, bc ; address byte after last byte
ld b, c ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ; compare
sub (hl) ; next byte
jr c, frst_less ; jump ... ; swap pointers
dec hl ; last byte of string
ld (hl), ctrl_enter ... br /> fwait ; make
fdel ; last value
fstk0 ; zero
Seeing the code/In emulatorHello, Here is my Noob question. Is it possible to see the code for these games in an emulator? To be able to study the code? I am using the Sp…
... />
Each pixel is a byte of RAM.
[quote]
, then ...Kliatba Noci IssuesI am having issues loading - not playing, LOADING - Kliatba Noci on my 128K Spectrum (Toastrack). The game seems to load the first two blocks, then I…
... some extra bits after the last byte of a fake header. If they ...How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... trying to save the effort of becoming fluent in hexadecimal ... ten isn't a power of two :p
For ... .
Of course that's true too ...
Yes, it's the last byte of the screen, before the attrs ... 22528 as the start of the attrs, :) hehehHow did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... ;759795]Yes, it's the last byte of the screen, before the attrs ... remembered 22528 as the start of the attrs, :) heheh[/QUOTE]
How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
summat to do with paging? I would assume so. aha DFFF, last byte of a page?LOADing 128k's worth of data???Just getting to grips with the concept of the 128's 'bank switching' set up, but how can you load the stuff into memory from tape (or TAP file)? Do…
... banks between the last byte of one bank and the first byte of another bank ... 's really loading scattered chunks of data here and there...Why do modern computers go slow?I'm not so much thinking of home PCs slowed down by viruses, more the extent that modern programmers think about the speed of their code. For exampl…
... Microsoft Office and has plenty of RAM available, wouldn't the 64-bit ... version of Office make a difference? I ... with an i7 and 8GB of ram, sometimes more, with 32-bit ... versions of Office. Doesn't that lead ...Why do modern computers go slow?I'm not so much thinking of home PCs slowed down by viruses, more the extent that modern programmers think about the speed of their code. For exampl…
... Microsoft Office and has plenty of RAM available, wouldn't the 64 ... -bit version of Office make a difference? ... with an i7 and 8GB of ram, sometimes more, with ... 32-bit versions of Office. Doesn't that ...
The main benefit of 64-bit Office is that ...Chloe 280SEHi all, Could somebody tell me how far this project is to being complete? [url]https://github.com/cheveron/sebasic4/wiki/Chloe-280SE[/url] Im ver…
... Buddy as a shell in RAM. If I thought people would ... write hundreds of apps for it that would ... remember the SE has 32K of RAM available in the ROM area, so ... to make the windowing toolbox available without eating into normal RAM.Chuckie Egg 2 PokesOkay, so, I fancy a crack at Chuckie Egg 2 before FA Cup MotD comes on. Loaded it up, and tried the Multiface poke, but the one that crops up EVERYW…
You can also do a POKE 65535,176 before you load the game because the game checks the contents of the final byte of ram when it finishes loading and if it's 176 it gives you infinite lives by NOPing the DEC (HL) instruction for you. :-)Chuckie Egg 2 PokesOkay, so, I fancy a crack at Chuckie Egg 2 before FA Cup MotD comes on. Loaded it up, and tried the Multiface poke, but the one that crops up EVERYW…
... game checks the contents of the final byte of ram when it finishes loading ...128K programmingDoes anyone know any good resources on assembly programming for the 128? All I'm after is an "idiot's-getting-started-guide" on how to utilise the…
... /> ;
; Using 128K RAM bank switching
;
... br /> ; Write a byte first to bank 0...
byte of RAM bank 5
ld ... byte... :)
ldir ; Zero the entire bank of RAM< ...Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…
... 1110
Address 22527 : Last byte of screen bitmap = 0101 0111 1111 ... br /> Address 22528 : First byte of screen attributes = 0101 1000 0000 ... (bit) from the right of the second nibble. When ... becomes the first attribute byte this bit changes from ...Usefullness of program listings in magazinesEarly computing magazines had printouts of program listings. I always felt this was a nice thing in that you might read the code and learn something,…
... were actually reproducing the output of a printer, after someone had ... just poke 255 into the last byte of each UDG before typing LLIST ...Test your emulator with one damn tricky TZX file!Some time ago I got hold of this tricky TZX file with a custom [i]super[/i] turbo-loader. [i]The load time is 18 seconds (!)[/i]. Until recently, I w…
... 0x04 (used bits/samples in last byte of data) should take a value ... of 1–8 (according to the ... /> If I manually change that byte to any value other than ...Test your emulator with one damn tricky TZX file!Some time ago I got hold of this tricky TZX file with a custom [i]super[/i] turbo-loader. [i]The load time is 18 seconds (!)[/i]. Until recently, I w…
... mean it ignores the parity-byte ??
[/quote]
... [quote]Used bits (samples) in last byte of data (1–8)
( ... only first two samples of the last byte will be played)[/quote ... specifies the length of the very last byte of data, potentially enabling ...Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…
... the ROM MASKINT as the last line of your interrupt service routine ... />
[code]
[ rest of your ISR ]
JP MASKINT ... AF
LD HL,$5AFF ; last byte of ATTRs
LD A,(HL ...im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…
... frame scroll (shifting the whole of the tunnel area from right ... ve had to set all of the rows to the ... used. (I'm using the last byte of each row to tell me ... how much of it is actually used.) I ... mark the start & end of each row, but that would ...Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…
... ="Arkannoyed;931563"]I thought back-of-fag-packet was the norm ... />
There are a couple of non-ASCII characters, notably the ... with the em dash. The last byte of each character stores its width ...Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…
... 99% compatible version of Speccy BASIC with 4GB of RAM available (which practically means ...Technician Ted disassemblyOkay, by popular (?) demand I have dug out my old disassembly notes on Tech Ted, converted them to skoolkit and stuck them up at [url="https://github…
... pause between the end of the BASIC and the ... precise values on screen of the animated characters at ... , what's the purpose of the message in the main ... you take the first byte of RAM you could reasonably write any ... indeed the next byte is the start of the main ...Tape to +3 disk transferWhen the first basic part was merged from tape, to be saved to disk, and it looked like this: [img]https://i.imgur.com/UQx1hc2.jpg[/img] how di…
... put a breakpoint at 1365 (last byte of the loading routine). When it ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... this will not recover 100% of the Spectrum +3s memory ... you can load (almost) every byte of RAM accessing directly to floppy controller ... you must place every chunk of memory at known (fixed) ... "B:" or du54 utilities), instead of copying only files.
- It ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... you can load (almost) every byte of RAM accessing directly to floppy controller ... you must place every chunk of memory at known (fixed) ... "B:" or du54 utilities), instead of copying only files.
- It ... />
The big advantage of using +3DOS is, as you ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... can load (almost) every byte of RAM accessing directly to floppy controller ... you must place every chunk of memory at known (fixed) ... B:" or du54 utilities), instead of copying only files.
- ... , it just corrupts part of the screen. Basically compress ...Looking for Woody's old DiskBuilder utilityI used to have it many moons ago. It writes a +3 .dsk with bin files and had a nice loader with AY player. I used to use it to put loads of games on …
... don't have code in last 512 bytes use this in ... 49152).
You need the last byte of the mlz file to match ...Who's NEXT?How about having a category just for Spectrum NEXT owners? I got mine on Monday, its the original issue, plain jane and quite enough for me to ge…
... you have the same amount of ram available as on a regular spectrum ... going into the usual 48K ram.
However you ... there is 768K of standard ram available (less 128K of the standard zx128 ... storage from the point of view of a text adventure, so ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... I used a 24x2 byte lookup table to work ... the screen address instead of calculating it using code ... have a null byte at the end of the string or ... set the high bit of the last byte of the string.. DC in ... (colours, brightness, flashing) of a string. I used a ...
