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Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…
... /> So, here's a suitable routine for detecting a press/release ... />
So, we have a routine implementing the pause function; where ... , but I think the routine should go in uncontended RAM ... the breakpoint, assemble the keyboard routine and load it into memory ... -
Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... .1985). He says about the routine "The horizontal flip is noticeably ... -
MGT MOUSE - exist really ?I read disassembly of +D rom/ram code and from address #2249 is routine for read MGT MOUSE ports. I can't find any info about "MGT MOUSE". Exist real…
... and from address #2249 is routine for read MGT MOUSE ports ... :
[CODE]THE 'MOUSE' ROUTINE
This routine is also present in ... -
BIFROST* for graphic artists - part 2: static tilesThis tutorial provides some guidelines for designing multicolor tiles. Before reading this text, it's strongly recommended that you (re-)read [URL="h…
... instance, look at this multicolor tile:
[IMG] ... touches" one side of the tile area, obstructing the background. ... "fill" the entire multicolor tile, thus obstructing the background on ... space" to help separate tile images, otherwise your program may ... -
Multicolor chess?I thought multicolor chess pieces would be a good idea, since it's easy to fit a 8x8 chessboard within the 9x9 tile area of BIFROST*. However this tu…
... 8x8 chessboard within the 9x9 tile area of BIFROST*. However this ... -
Rainbow Chaos(I so want to call this Law of Chaos to pun on lords) Anyway. Dunno if I'll make this. But if I don't /someone/ will want to. It's just too good an …
... thinking that 2 or 4 tile animations would make it very ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... impacting the reset of the routine... enough of the postulating...
[/code]
ok the routine...
[code]
1600 ... adding extra opps to the routine.)
It should return ... -
MC LPRINT 23681Having problems with this routine to print large on the screen using LPRINT, it works ok in BASIC, but cant seem to get it to loop for some reason in…
Having problems with this routine to print large on the ...
call print ;call print routine
pop bc
pop ... -
JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …
... additions.
Original teleport routine is copyright Your Spectrum issue ... (47416 bytes) and the keypad routine as per JSW1 albeit this ... -
JSW1 - Game Loader DifferencesThere were four releases (five if you count the PGC bugfix) although with a few exceptions the loaders are about the same. [B]Loader: Pre-Production…
... Million" uses Speedlock. The 'saver' routine is loaded and the game ... -
RCS HelpThis plea for HELP is related to the RCS screen handling routines thread. To further save space in the current crop of routines its looking like the …
... needs to be reversed. The routine takes an address in BC ... then D
Current routine:
[CODE]78 ld a ... -
MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …
... features.
The routine gets its instructions from three ... a collision handler routine or key handler routine is required, or ... ; else line*256 for exception routine
; attrib = $FF ... ; GOSUB = line*256 for exception routine
;key = $FF to ... -
LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
... /> ;; counter value.
;;
;; The routine leaves carry clear
.getlength ... -
filled shape creating codeDevelopment is continuing well on a resurrected project of mine from about 20 years ago. Speed and size optimizations are going well along with displ…
... for needs a type of routine that I've not attempted ... filled 4 sided shape creating routine. Ideally give it 4 sets ... -
Documentation of ZX Spectrum built-in functionsHi, Is there a documentation of the built-in ZX Spectrum 48+ functions (assembly)? I am thinking about something like the documentation included in …
... are stored, where is each routine for PRINT, COS, SIN, etc ... -
New Game: Cad?veri?nWe have added some new features to our engine and have produced two brand new games to test them. Here's one of them, the next one coming up shortly:…
... pressing "fire" over the blueish tile you will find in every ... -
Questions about Spectrum 48K soundsHi, I find it a very intriguing task to produce sounds on Spectrum 48K, which has only a beeper. - I am very curious to know how the games produced t…
... it's own, faster BEEP routine, because storing all it's ... 48 KB
- The BEEP routine produces a sine wave? -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... /> ldir[/CODE]
The routine above runs in 86041T, thus ... [/CODE]
The routine above runs in 51204T, thus ... /> This looks much better. The routine above runs in 67365T, thus ... [/CODE]
The routine above runs in 67225T, thus ... -
Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…
... be better developing my multicolour routine on the 48K first, being ... . I've just written a routine that seems so awkward it ... -
z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... at address 0xd4d4 (interrupt service routine entry)
wpoke(0xd4d5, ... screen
LDIR
; ROM routine, read keys and update clock ... br />
; pointers to interrupt routine.
defb 200,200 ... -
Renegade Hit Squad Re-releaseI've found a problem with TZX included in file [url]ftp://ftp.worldofspectrum.org/pub/sinclair/games/r/Renegade(TheHitSquad).tzx.zip[/url]. The Spee…
... is loaded by the ROM routine, so can't be a ... -
SkoolKit 3.6SkoolKit 3.6 has been released. In case you are unaware, SkoolKit is a set of command line utilities (written in Python) for disassembling Spectrum …
... or Z80
[*]automatically label routine entry points
[*]automatically annotate ... every routine entry point with a list ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... several animation frames for each tile, and not much CPU left ... -
that "listing variables during runtime" thingWell, I did eventually finish this, but with my meds playing up I don't have much time each day that I can spend at the computer, so it's taken rathe…
... 3rd - the improved SCREEN$ routine assembler listing:
[ ... 4th - the streamlined print routine assembler listing:
[ ... Part the 5th - the relocation routine assembler listing:
[url ... addresses within the target routine, which would otherwise become ... -
Clear the screen from assemblerI want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is p…
I want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is possible. Can anyone advise on how to call this command or some similar routine to clear the screen? -
Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... go through the whole initialization routine, halting with the first 1 ... -
A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
...
ret
; paging routine
; destination page is a ... going to use any BASIC routine, I guess it could be ... given length (to put that routine inside BASIC). I'm doing ... -
Beepola v1.08 AvailableA new version of Beepoa, v1.08, is now available for download from:- [url]http://freestuff.grok.co.uk/beepola/[/url] (1.76MB zipped exe, no installe…
... levels, and requires no IM2 routine. The overall sound has been ... -
Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... border colour when the NMI routine exits (and also save the ... -
Using the lightgun...I am thinking of developing a game for the Sinclair/Cheetah lightguns, how do I go about reading the data from it (Basic and MC)? I am under the imp…
... correct?
The same routine to read the data only ...
