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Obfuscated code ideaThe instructions [b]SUB A[/b] and [b]XOR A[/b] both have the effect of setting the accumulator to zero. The only difference between them is that [b]…
... />
[code]SUB A
PUSH AF
POP BC[/code ... , while [code]XOR A
PUSH AF
POP BC[/code ... -
A tidy loader for minigamesThe minigame competition doesn't permit the use of separate loaders like [code]10 LOAD "": RAND USR 32768[/code] The loader must be included in the b…
The minigame competition doesn't permit the use of separate loaders like
[code]10 LOAD "": RAND USR 32768[/code]
The loader must be included in the byte count.
In an attempt to save as many bytes as possible, people have written ... -
Game rarity field in the ArchiveDoes WOS have this field or some info somewhere for game rarity? If not is it possible to add one that people can vote on (obviously discounting any …
... any fraud votes meant to push ebay value)? I'd recommend ... -
Airline SoftwareCan anyone remember what Airline Software's message scroller was called? It's not listed on Infoseek and I'm wondering whether it's MIA. I ordered …
... what Airline Software's message scroller was called? It's not ... -
Results of Di:HALT (music/graphic/demo)Official Online Place Score Place Score [ ZX Spectrum AY/YM TurboAY Music ] 1 6.30 2 5.66 adversary - Cj Splinter […
... 2 6.09 Koshki megademo (Cats) - AAAband
3 4.11 ... -
Invasion of the Zombie Monsters - What do you think of it?In case you missed it, RELEVO Videogames have just released their excellent Invasion of the Zombie Monsters game for free... (See [url]http://www.wo…
... challenging... its anything but a push over (in some ways, perhaps ... -
Optimize this assembly?Aiming for Variable*192 -> HL In the first case, I came up with the obvious method - *128 +*64: [code] ld a, (variable) ;13 ld h,0 ; 7 ld l,…
... /> add hl, hl ;11
push hl ;11
add hl ... /> RR L ; 8
PUSH HL ; Save A*128 11 ... -
Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …
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LD HL,#1303
PUSH HL
LD (#5C3D),SP ...
LD HL,#1BB0
PUSH HL
LD HL,(#5C4F ... -
Loss of innocenceI suppose my ZX Spectrum era lasted longer than most (although not sure longer than most of you on here). I received my first Speccy back in '83, and…
... /> When did you lose your faith in the Spectrum and turn ... -
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... 6
push hl ; 11
push de ; 11
push bc ; 11 ...
exx ; 4
push bc ; 11 Subtotal = 54
PUSH[/b] is largely illusory. ... -
Things I'd ask Chris Smith if he would give an interview about his book and researchGiven your current knowledge about the ULA interns, knowing what technology was capable to do those days, and knowing what people then and now would …
... 6C001E ULA device? Did Altwasser push the ULA to its limits ... -
Saga Dark, by Triton SoftwareIt has been a proyect that went withdrawn late 80s and since then has remained in obscurity until now. A third phase was pretended but finally uncomp…
... from a hungry giant dragon. Push [B]R[/B] and [B ... -
ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…
... to display proportional font using push xh xl yh yl? or ... -
Plastic Help. Plastic Hell.A few weeks ago I brought a very good condition push chair 2nd hand. It was ideal because it is designed to to be part of a travel system and goes wi…
... brought a very good condition push chair 2nd hand. It was ... -
How do you work with fonts on speccy?just curious really.. I know c64 workings, and obv. the spec you draw direct to screen.. on 64 , you'd make what would be equivalent to UDG.. and sa…
... ) ... the 2nd line of the scroller you'd just "AND" it ... -
The Sadness of my Decaying Speccies.I've been avidly collecting ZX Spectrums since the late 90's and whilst at the time of the late 90's and early millennium my Spectrums and associated…
... , Microdrive not found unless I push the cart in at great ... -
Another machine code problem, sorry[CODE] OPCODE HEX ADD LD A,00 3E00 F000 PUSH AF F5 F002 LD B,05 0605 F003 LD C,06 0E06 LOOP F005 POP AF F1 ADD A,C 80 DEC B 05 …
... A,00 3E00 F000
PUSH AF F5 F002
LD ...
DEC B 05
PUSH AF F5
LD A ... -
Wanted: Manic Miner (Mastertronic version)As topic title, I'd like this :) The Mastertronic / Mastertronic Added Dimension Re-Release. At a push, just inlay would be nice as (apart from a …
... -Release.
At a push, just inlay would be nice ... -
emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…
... on ehas managed to use push to get 16 pixels onscreen ... -
New game Sea Dragon (beta)Hi. Over at zx.pk.ru there is a lot of talk of a new game for spectrum called Sea Dragon. It is a VERY nice underwater side scroller... technically V…
... a VERY nice underwater side scroller... technically VERY well done (full ... screen scroller that fast on the zx ... -
Worst gaming decisions ever?In a different thread, I mention what, to me, is probably the single greatest mistake in the history of computer/console games design ever. Here are …
... great things like parachutes and push bikes, but it just wasn ... -
Various game / utility / cover tapes.Having a clean-out - If anybody interested in buying any of the following drop me a PM. Anything not taken by next weekend will go onto eBay. Games…
... , The
Pud Pud
Push Off
Rapscallion
Rockford ... -
Savage - music creditsSomehow I've missed that in the game both composers were credited - David Whittaker, who earlier was credited as author of all the music in the game …
... credited as music author in scroller in the part 2 of ... ), credited as music author in scroller in the intro. There are ... too, he mentioned in the scroller as the author of sound ... -
Animals and fpsStrange thoughts always appear after bedtime: We have all seen videos where cats and dogs apparently are watching TV and even trying to catch whatev…
... have all seen videos where cats and dogs apparently are watching ... -
No ZX ZUMA?Hi guys, Lately my nephew and I argued a little that almost all new modern games are but remixed copy-cats and I could prove it (with reverses to 3D…
... games are but remixed copy-cats and I could prove it ... -
A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... ) to coord H, L
push hl
ex de, hl ... /> ret nc
push hl
push de
;; gets ATTR ... -
Spanner seeks helpHello, and HNY, all. I am presently writing a game in BASIC. It's a bit - a lot - crap, but I'm enjoying it! Anyway, a couple of questions, if you …
... , but don't want to push my luck.
Thank ... -
Am I bidding against anyone here?[URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320638991747&ssPageName=STRK:MEWAX:IT"]ebay link[/URL] Because if I am then ill stand down…
[URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320638991747&ssPageName=STRK:MEWAX:IT"]ebay link[/URL] Because if I am then ill stand down but if not I intend to push this one all the way. -
Amiga 1200 or at a push 600Looking to get one of these shipped to my parents in Manchester. Anyone got one spare cheap who can't be bothered putting it on Ebay? PM me with wh…
Looking to get one of these shipped to my parents in Manchester. Anyone got one spare cheap who can't be bothered putting it on Ebay?
PM me with what you go and what you want, thanks.
