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Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…
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I quite liked Dr Beep's simple routine here (OK, it's ... -
Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…
[QUOTE=Dr BEEP;637636]Patrik,
your routine is indeed 'perfect', but perfection ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
[QUOTE=spud;640500]17 bytes with a return added, and isn't constrained to a specific location in memory. Ding ding! Do we have a winner?[/QUOTE]
Yes, his name is Dr Beep since his routine works! -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
[QUOTE=Dr BEEP;640505]Yes, his name is Dr Beep since his routine works![/QUOTE]
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
[QUOTE=Dr BEEP;640569][code]
org $7848< ... the ROM would have a routine ending on
LD (HL ...Saving space using procedural graphicsAfter spending several hours playing around with various packers to squash the Alien8 test screen$ it occured to me that maybe bigger space savings c…
[QUOTE=Dr BEEP;641300]616 + 76 Download [URL=" ... />
I've assembled your routine so it can be compiled ...PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…
[QUOTE=Dr BEEP;647396]To print the score ... can use this universal add routine, all you need is constant ...PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…
[QUOTE=Dr BEEP;647403]ADDing or INCrease the ... reason i created this universal routine to work with big numbers ... 's say in im2 (independent routine), then incrementing by 1 per ...Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... by bigjon, incorporating suggestions from Dr Beep, skoolkid and Matt B
Because our routine will continue from the loop ... to 'brake')
;wait routine
ld bc,$1fff ;max ... ;save score
;wait routine
ld bc,$1fff ;max ...Sam CoupeI am very interested in the Sam Coupe but I wanted to ask a lot of questions about it. Do anyone here use one a lot and are there any Sam Coupe foru…
[QUOTE=Dr BEEP;686278]Or as a ZX81 ... also small patch in keyboard routine.
In second 16kB page ...Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …
... ]Bear in mind everyone that Dr BEEP is an [i]extreme programmer ... take time to streamline a routine on the PC ... it's ...How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
Dr BEEP's routine is ideal, but how would I go about reading the keyboard for 'H' if I disable interrupts (di)?How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
[QUOTE=daveysludge;696707]Dr BEEP's routine is ideal, but how would I go about reading the keyboard for 'H' if I disable interrupts (di)?[/QUOTE]
Easy, just do it the way Arjun suggests. That's what I would do. ;)How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
... Dr BEEP[/B]'s only works if the ordinary Speccy system interrupt routine ... you have your own interrupt routine running, then you have to ... you can begin your interrupt routine with CALL 56, which ... will call the system interrupt routine first, then come back to ...How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
[QUOTE=daveysludge;696707]Dr BEEP's routine is ideal, but how would ...Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
[QUOTE=Dr BEEP;698359]Use 4 keytables.
< ... a copy of the ROM routine and 3 keytables (unshifted, CAPS ... you?!).
However, that routine only copes with both shifts ...Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
[QUOTE=Dr BEEP;698359]
Make a routine that reads all 38 keys ...Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... my best wishes for Mrs Dr Beep.
If speed isn ... true, in which case my routine would be 68 bytes!"MONOCHROME": Magazine about ZX81 (issue 2 - 2012)[b]OK, seems like every subscriber got his paper copy. So, hereby I publish an electronic - PDF - version of "MONOCHROME" ZX81 magazine (issue 2 - …
[QUOTE=Dr BEEP;720531]And not even all ... when it comes to this sort of stuff.
[QUOTE ... alive. :)
Dr BEEP:
Yupp, it's hard ...Been busy today.... Protesting!Today I went to Amsterdam to protest against the government. Here I am when someone took a photo of the political leader of the dutch socialist part…
... she knew due to the sort griffen and his "pals" wanted ... />
I was hoping more Dr Beep would say "oh thats my ...Been busy today.... Protesting!Today I went to Amsterdam to protest against the government. Here I am when someone took a photo of the political leader of the dutch socialist part…
... she knew due to the sort griffen and his "pals" wanted ... />
I was hoping more Dr Beep would say "oh thats my ... )[/QUOTE]
down with that sort of thingWhat would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
[QUOTE=Dr BEEP;726618][code]
ld ix, ... own striping, copy the ROM routine and alter the IN/OUT ...What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
[QUOTE=Dr BEEP;726623]Define fail.
Only ... can return to your own routine.[/QUOTE]
I meant ...What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
[QUOTE=na_th_an;726620][QUOTE=Dr BEEP;726618][code]
ld ix, ... own striping, copy the ROM routine and alter the IN/OUT ...SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
[QUOTE=Dr BEEP;727064]When making your own routine, why not extend it to reading UDG as well?[/quote]
The one in SE Basic not only handles UDGs but also 8-bit ASCII character sets.SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
[QUOTE=Dr BEEP;727064]When making your own routine, why not extend it to ...Was there a 'great' golf game on the spec?So...a few sports had games made of them on the speccy that were more or less as good as you could hope for IMO. Emlyn for football*, konami's ping p…
... 's inability to display the sort of multicolour graphics it was ... /> just...bleugh
[QUOTE=Dr BEEP;727186]I liked Konami Golf ...SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
[QUOTE=Crisis;727509]Dr Beep made the "incredible shrinking screendump" ... ]
I suspect Toni's routine still calls the original ROM ... yes, you could CALL the routine.
[quote]What can a ...
