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How much memory on sprites, maps etc.I've been tinkering with shifting & pre-shifting sprites recently, but as I haven't had that much experience with Z80 assembly I sometimes find it ha…
... out ways to reduce the memory it takes up, such as ... still have to hold everything in memory at once - unless it's ... would save you having to store them all at once. I ... -
Paradroid for C-64, why not in the Spectrum?Reading the special 30th anniversary Retro Gamer, I came across this game which was considered to be the best game for the C-64, and it does not look…
... the time I was in awe of the pictures in zzap of flesh ... " - quite the opposite in fact, great games in their own right. Well ... more than you would think, in fact; quite a few ports ... also be combined together if memory serves me right). It was ... -
Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …
... into A
push hl ; store our string address while we ... )
ld l,a ; store back in L
add hl,hl ... ; store character count
ld b,$08 ; 8 pixel lines in a ... in screen memory
inc e ; point DE to next character in screen memory ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... copies of the same decompressor in memory, thus wasting at least 9 ... ; 2K
[empty buffer to store current level or music] -> ... some reason you can't store levels separately), but you need ... tricky because you can't store uncompressed data exactly on top ... -
What games benifit from having a faster spectrum?I'm using Spectaulator atm and have been playing around with the mhz slider. Could real Spectrums be added to or altered to act this way? Could the…
...
I had one back in the day and it was ... past tricky bits in timing critical games, but in reality it ... />
You're right in that it's not really ... to read from the lower memory at the same time.< ... a CPU as most store data in temporary registers. This has ... -
BIFROST* for graphic artists - part 1Using multicolor requires 2 very different skills: [I]programming[/I] and [I]graphic design[/I]. I already wrote several tutorials about the former …
... 2 (or more) tilesets in memory and simply switch between them ... perhaps even somewhere else in memory). If stored in disk, they just ... they could be stored in other memory banks. In this case, accessing ... single memory page (16Kb) would be enough to store about 8 ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... yourself) that attempt to stay in memory limits too. If you need ... structures, there are a few in z88dk's code repository and ... can let you store best direction for each position in the map ... map from the goal and store the stink at each map ... -
ZX-Assembler in progress...Dear readers, I just want to announce that ZX-Assembler is not longer only an idea in my mind. It's just alive. Unfortunately, it's too early to mak…
... finally begin to learn programming in assembler. [/QUOTE]
... manual marking parts of memory as code or data ... and write code and store it into an ASM ... file to store the info above, in case you ... should automatically reorder them in memory and always save it ... -
How to test Z80 Code?Hi All, Is there a way to test a block of z80 code (nothing speccy specific in it) with many different inputs? The reason I ask is that I'm writing…
... you just put/generate it in your code?
Then ... with your data and store the result in memory.
Then execute ... emulator and save part of memory with your data as binary ... -
Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... in fast RAM, so higher than 32768. Below that you can store ... all getting a bit tight memory-wise, but I'd like ... that I might be encroaching in areas that could negatively affect ... about having the stack low in memory.
I might see ... -
New game: The curse of OddvilleDon't get too excited! :p Just wanted to share this because the coding of it is driving me mad, or rather the game designer is. The curse of Oddvil…
... be using something like this in my larger games but the ... are actually 18 screens held in memory, 2 for each screen - this ... a game editor I would store all collectable blocks as an ... -
New game: The curse of OddvilleDon't get too excited! :p Just wanted to share this because the coding of it is driving me mad, or rather the game designer is. The curse of Oddvil…
... are actually 18 screens held in memory, 2 for each screen - this ... locations.
In this case, you could store all duplicates screens ... -
Games/Programs making use of DivIDE featuresHello :) I have a question: I may be wrong, but it looks like the DivIDE and similar interfaces for the ZX Spectrum are almost exclusively used for …
... />
You'd be in the position of PCs when ... enhances gameplay? Lots of static pictures or video? A multimedia ... do with the 128K of memory if you didn't ... a minimal set of graphics in memory, but if you just ... loaded in small bit of levels ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... [/URL]? Just keep somewhere else in memory a copy of the image ... ]
If I just store the image data then that ... has to shuffle the bytes in synch with their screen addresses ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> ;; the loaded byte is stored in memory.
;; D: a bitmask ... /> ld (ix+0),a ; store byte
inc ix ; advance ... br /> ld d,a ; store new current edge for next ... -
Spec dev in the eighties and ninetiesWhat different ways were there of making speccy games? There is the 'worst' way which is typing in hex commands in Basic unreadable, easy to make m…
... /> I remember reading about it in an article off here about ... fit into demos is now in them and routines are extremely ... compress the binary, can store the whole program in memory in 1 go.. so ... -
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…
... br /> ld a, (hl) ; store it in A
cp ')' ; closing ... br /> ex de, hl ; store pointer in DE
rst get_char ; ... report_4 ; error if out of memory
ret ; end of ... br /> ld b, a ; store it in A
jr z, ... -
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…
... ; stack constant
defw x80_fst ; store in memory
defw x80_fgt ; get from ... stack constant
; THE 'STORE IN MEMORY AREA' SUBROUTINE
org 0x3483 ... c, a ; store it in C
call int_store ; store result on stack ... -
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…
... t put a buffer in contended memory of the Spectrum 48K ... you store bitmap and attribute pairs together in your buffer? In this ... case, the buffer would store data in ... referencing the corresponding pair in buffer address. In this case, the ... -
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 (newppc), bc ; store in newppc
inc hl ; ... ; variable address to temporary memory area
fwait ; enter ... ld (datadd), hl ; and store in dat-add
ret ; ... /> ld (err_sp), sp ; store in err-sp
ex de ... -
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…
... /> call test_room ; check available memory
pop hl ; unstack ... /> ld (k_cur), hl ; store it in k-cur
ld (hl ... /> ld (mem), hl ; store it in mem
pop hl ; ...
ld c, a ; store in C
ld hl, op_str_lu ... -
bit manipulation conundrumWhat's a neat way to change this bit pattern in registers BCDE: [code]Loop0: ;change B:00000000 C:abcdefgh D:ijklmnop E:qrstuvwx[/code] to this bit …
... once the source data is in memory. It's quite possible ... ld iy,bufferTarget
; store in source buffer for more consistent ... now in the top nybble
ld h,a ; store top ...
Get3to4:
push bc ; store the loop counter from the ... -
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... /> I couldn't find it in the code at first glance ... are pre-shifted externally. I store in memory four rotate versions of each ... data is GfxBu.c, included in the source. -
Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…
... only get the picture shown in the left half or top ... sync and beam scanning circuits (in CRT type) or equivalent functions ... .
Scan converters store a picture in memory so that they can ... -
Sierra AGII've been thinking recently about starting a project to port Sierra's AGI engine to the ZX Spectrum 128. I've been reading the AGI specs and to me i…
... how (fast) scripting works in [URL="http://www.worldofspectrum. ... it would be better to store compressed screens instead (see ... those platforms because of memory and graphics limitations[/COLOR][/ ... all compressed screens at once in memory, and load more screens ... -
Land of Mire Mare[Quote]This game has to be considered as a tribute. It's inspired by the unreleased Mire Mare game & characters created by Ultimate Play The Game in …
... axe.. I did read that in the instructions but didn't ... through how to do things in AGD and then I helped ... game, where best to store compressed screens in memory then adding Mister Beeps ... -
Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
If you have your store your tile in memory one after another instead of ... -
THE HOBBIT loading screenHello again, thought I'd have a go at an alternative loading screen for The Hobbit. [IMG]https://dl.dropboxusercontent.com/u/61658082/THE%20HOBBIT%…
... the same screen is reused in different locations, and if ... the rooms = gfx somewhere in the code I guess?.. I ... , is a port routine wise in that sense.
pictures in as it goes.. as ... it was all in 1 load into memory .. and they ... -
THE HOBBIT loading screenHello again, thought I'd have a go at an alternative loading screen for The Hobbit. [IMG]https://dl.dropboxusercontent.com/u/61658082/THE%20HOBBIT%…
... did find the lack of pictures after the first part a ... /> I did find the existing pictures in the first part even more ... description for the first location in [URL="http://www.worldofspectrum.org ... obviously didn't have enough memory left for graphics. The entire ... -
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... your screen buffer is in linear order instead of ... off, store the stack pointer at a fixed place in memory, ... PUSH all those registers (in reverse order) to get ... fetches a value from memory; PUSH moves the stack ... just after it writes to memory.
Once ...
