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InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... JP to your 'real' interrupt routine. However, this doesn't work ... tstates to reach the interrupt routine:
* M1: 7 ... have a short interrupt routine, it is possible that the routine finishes before ... set to 0x0066. An NMI routine should end with RETN, ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... upper border (using a short interrupt routine in IM2 to make sure ... , I'll rewrite the start routine that I've just typed ... -
did anybody program games for their spectrum?did anybody make games for their spectrum and have you still got them in tap/z80 format. i once attempted to make a side scrolling game but it didn…
... - all BASIC except a short MC routine to draw each screen - it ... -
Huffman questionI'm pretty sure that the answer to my question is "no", but I just want a second opinion: Is it possible to somehow cram a Huffman decompressor + de…
... play with - I think a routine that does the tree construction ... what's required (a small sort routine, a tree recursion) I'd ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... JP to your 'real' interrupt routine. However, this doesn't work ... tstates to reach the interrupt routine:
* M1: 7 ... have a short interrupt routine, it is possible that the routine finishes before ... set to 0x0066. An NMI routine should end with RETN, ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... have a short interrupt routine, it is possible that the routine finishes before ... , if your IM 2 interrupt routine is just a simple EI ... width, using the smallest interrupt routine possible ("EI;RETI") though an ... -
Samples on ZXWhat is the easiest way to make a sound sample (e.g. sampled speech)on Spectrum using pc samples? Suppose a have a PC .wav file and I want to transf…
... . TWINZ! use little more clever routine as it keeps few samples ... , play it or save just short player routine with data.
sampling ... -
compilerI am currently developing a sudoku game for the old faithful speccy. My idea is to write the code in basic and then compile it to m/c because i suck …
... . [/QUOTE]
hm, a short MC routine could do the job. can ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... clock cycles!):
Since a sort in a game is likely ... after the first time the sort has been run then for ... be. A more complex sort routine (quick sort, comb sort) would also be interesting ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... a look at Kiwi's sort routine (from the same thread as ... one):
[CODE]sort: ld hl, numbers ; point hl ... swap occurred so, repeat sort
ret ; sort complete[/CODE]
Even that routine could be optimized futher though ... -
Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... realised I need just an short assembler routine that would play e ... -
Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... realised I need just an short assembler routine that would play e ... -
text routineI want to write an adventure in basic, and instead of a writing out a description for each location i want to use a kind of text compression routine …
... basic part is just a short input routine to let you enter ... -
Quick q. on MC vs. BASIC (boring question)No matter how long or tedious the programming/testing may be ... Is Machine Code [B]ALWAYS[/B] faster than BASIC?
... .org/wiki/Quicksort]quicksort[/url] routine, but I wrote a [url ... .wikipedia.org/wiki/Bubble_sort]bubble sort[/url] in machine code. But ... BASIC doesn't provide a sort routine at all so I can ... -
Quick q. on MC vs. BASIC (boring question)No matter how long or tedious the programming/testing may be ... Is Machine Code [B]ALWAYS[/B] faster than BASIC?
... .org/wiki/Quicksort]quicksort[/url] routine, but I wrote a [url ... .wikipedia.org/wiki/Bubble_sort]bubble sort[/url] in machine code. But ... BASIC doesn't provide a sort routine at all so I can ... -
Quick q. on MC vs. BASIC (boring question)No matter how long or tedious the programming/testing may be ... Is Machine Code [B]ALWAYS[/B] faster than BASIC?
... .org/wiki/Quicksort"]quicksort[/URL] routine, but I wrote a [URL ... .wikipedia.org/wiki/Bubble_sort"]bubble sort[/URL] in machine code. But ... BASIC doesn't provide a sort routine at all so I can ... -
Quick q. on MC vs. BASIC (boring question)No matter how long or tedious the programming/testing may be ... Is Machine Code [B]ALWAYS[/B] faster than BASIC?
... .org/wiki/Quicksort]quicksort[/url] routine, but I wrote a [url ... .wikipedia.org/wiki/Bubble_sort]bubble sort[/url] in machine code. But ... BASIC doesn't provide a sort routine at all so I can ... -
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... yourself. Write a very short interrupt routine that just does a RET ... -
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... yourself. Write a very short interrupt routine that just does a RET ... -
Machine Code: quicksort optimisationI came across this z80 quicksort implementation when going through the wikipedia article on the same. It's 44 bytes long. I was wondering if any of …
... Dutch army used Speccy to sort thousands off entries ...
sort routine that helps sorting the symbol ... long.
I like to sort in 2 ways, alfabetic and ... feature IMHO is that the sort is case sensitive, where Tornado ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... upper border (using a short interrupt routine in IM2 to make sure ... , I'll rewrite the start routine that I've just typed ... (or at begin of IM2 routine)
- compare is bits D0 ... -
Use a +2/+3 case as a replacement keyboard for 48KI was just wondering if a 48K Spectrum motherboard could be housed in a +3 case, and somehow the keyboard be connected so that it could have a proper…
... out by experiment with a short asm routine and a bit of ... -
Snapshots (SNA) -> Keeping the loading screen?I've seen quite a few Snapshots (SNA) that kind of hesitate on the loading screen prior to entering the game menu... I quite like this. Anyone know …
... the PAUSE command or a short MC routine that would pause for ... -
assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... some stats and generates a sort of overall rank.
I also sped up the sort routine from 120 seconds to 2 ... indirection. Rather than sort a 2 dimensional array, sort an index to ...
