-
Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…
That is possible of course, but DJNZ is faster and consumes only half the amount of bytes. And "Loop1" is well within the range of a relative jump. -
Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…
... misunderstanding the way that relative jump instructions are output ... distinction between the relative/absolute jump instructions. In both ... and/or absolute addresses (even relative addresses :) ) just fine ... range of the corresponding jump instruction of course. ... -
Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…
Slightly on tangent, but you also can't use JPs if you're writing relocatable code, i.e, if you don't know where in memory the routine will end up in memory. It's possible to add "jump islands" to do longer relative jumps (but this becomes rather messy). -
Change JPs by JRsIs there any (easy) way to replace all long jumps with relative ones in assembler code? Of course, I can replace all in text editor, and then place …
... /> JR uses a relative value and can jump only to 128 bytes ... -
Change JPs by JRsIs there any (easy) way to replace all long jumps with relative ones in assembler code? Of course, I can replace all in text editor, and then place …
... /> JR uses a relative value and can jump only to 128 bytes ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... /> Undesired effect: it may occasionally jump above the ground level for ... link:[/b] [url="http://sky.relative-path.com/zx/files/YIQ_1 ... -
TileMap test releaseI've been playing with a live map emulation idea, which currently supports just Jet Set Willy. You can download an early (Windows only) version of i…
... rooms can be tagged on relative to the room position they ... I'd expected) is the jump between The Wine Cellar and ... -
Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... address can already be calculated relative of PC and does not ... /> This will always do a relative jump 100 bytes from this point ... -
Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... />
Now we jump to this block. It executes ... original byte decodes the jump to find out ... NC,Read_Keyboard_2 will not jump so the BLOCK ... relative jumps intact) to relocate the software. Because I trap every jump ... that are in fact relative jumps (i.e. ... -
Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... anything that is not a relative jump will kill it. -
Adventures Inchi! I'm a BIG fan of adventures. I have a huge collection of them on my PC. By this I mean of course, games for Speccy, Amstrad, C64, Atari ST AND …
... ) [url="http://www.void.jump.org"]www.void.jump.org[/url] - World ... -
stuck in Jasper!Hi Speccy-buddies! I am playing the cool game Jasper but I am completely stuck on the screen with the two snakes. Its the screen which appears after …
... walking right there. I can jump up the platforms to the ... left on the screen and jump over the first snake but ... to do next? you cant jump over the snake coz its ... -
Spellbound Dizzyam i the only one who can't get the flippers to work? i looked at a solution and it said to hold down jump while carrying them but i just float up a …
am i the only one who can't get the flippers to work? i looked at a solution and it said to hold down jump while carrying them but i just float up a bit then fall back down. am i doing something wrong or have i just got a duff version of the game? -
Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …
... do such a program with relative ease,
Reply ... -
Stuck in head over heelsHelp - I'm stuck half way through in bookworld - even with map. I've reached a pink room with only one entrance - I can get heads to a platform at t…
... of the screen but i jump around up there to no ... -
WANTED: TapesHi All, Does anyone reading this forum have any tapes they want to sell, swap or donate ? It's for a good cause, the MIS/MIA/The .TZX Vault project…
Welcome !Hiya folks, Martijn kindly opened this forum so that we can help people create TZX files to help resolve the many MIA/MIS titles that are needed. M…
AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
... the data stream will be relative to the end of the ...LINE-routine and other nice pieces of codeThe line-topic came in the end with a nice piece of fast coding. I think that there might be more of these routines out there (where-ever-u-r). Isn…
... highbyte (7)
.......JP (HL) ; jump indirect to emulationroutine (4) + (10 ... /> org #8100
JP I00; jump instruction 00
JP I03 ...BIG problems accesing this siteHi, I have not posted here in quite some time. (the link in my favourites is [url="http://www.void.jump.org"]www.void.jump.org[/url]) I have tried at…
... [url="http://www.void.jump.org"]www.void.jump.org[/url]) I ...WANTED: TapesHi All, Does anyone reading this forum have any tapes they want to sell, swap or donate ? It's for a good cause, the MIS/MIA/The .TZX Vault project…
WANTED: MIS/MIA TitlesHiya, Does anyone have any titles they are willing to sell, loan or better still donate for our MIS and MIA projects ? Please Check out: [url]http…
Unlucky 13 quiz....at last i done a quiz.Ok heres my effort of a quiz.Usual rules apply,post your answers here and i will mark them on Sunday 23rd. There is a total of 20 points available...…
A martial art game.Ok, so I asked this on a more 'private' thread, I thought I'd let everyone a chance to guess... :) It's a martial art game. Our hero is naked from h…
... you had to duck or jump to avoid them. It may ...Manic Miner - Processing PlantI've tried a search of this site and other user groups and not found an answer. Can you help? How do I jump into the exit box in the Processing …
... ?
How do I jump into the exit box in ... ? No matter which way I jump I can't seem to ...Misleading blurbI've been looking thru some of the scans of adverts and inlay cards lately, and apart from the nostalgia, it's very entertaining to see some of the r…
... bizarre stand-on-the-object-jump-and-hit-collect-to-pick ... -it-back-up-as-you-jump-off-it move.
forbidden planet..ok heres an odd one thats always puzzled me. I wonder if anyones got any more info... I go to my local game shop, and i buy an orignal copy of forb…
