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When would you use LD A,R ?Can anyone tell me a practical use of LD A,R and LD R,A I am confused when you would need to use it? Cheers
Can anyone tell me a practical use of LD A,R and LD R,A I am confused when you would need to use it?
Cheers -
prob with database & R80. What am i doing wrong?for some reason i just cant get the info to come up about the speccy games when on the file list. ive tried to edit the config, but nothing comes up.…
for some reason i just cant get the info to come up about the speccy games when on the file list. ive tried to edit the config, but nothing comes up.
what am i doing wrong??
thanx for your help (in advance) -
Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
... 60000
EA60 21BCEA LD HL,NMBRS ;HL = start of ... of the code, but I am having trouble
understanding the ... overflow byte or something??? I am truly guessing.
I ... am really new to assembler, so ... -
I am selling hundreds of books & mags on E-bay.I hvae an auction on E-bay. I guess most of you will have seen it anyway.... It's not a specialist Spectrum auction. I am selling a few of my spare …
... a specialist Spectrum auction. I am selling a few of my ... -
I just bought the Amstrad e mailer with ZX Spectrum emulator built ini am i Its not a bad phone, i am posting this meesage with it. I wanted the phone anyway, the games centre was an extra bonus. Mind you , i think the games…
Its not a bad phone, i am posting this meesage with it. I wanted the phone anyway, the games centre was an extra bonus. Mind you , i think the games centre was a bit of an afterthought, its not that great. -
Thunderceptor - what am I meant to be doing?I don't quite understand what I'm supposed to be doing in "Thunderceptor". Your ship goes into battle, you shoot a couple of enemy ships, you dodge s…
... . Is my version guff or am I doing something wrong? -
Hello! I am new and looking for 2 games!First of all let me introduce myself. My real name is Yuri and half of my life up to now I lived in Ukraine where I first met Spectrum and it's world…
... I discovered amulators and I am at it again.
I am looking for following two games ... .
Second game I am looking for is a game ... -
I am soo glad I owned a SpeccyJust passing the time here, and decided (after seeing some CPC screenshots of Shadow Of The Beast in a YS scan) to compare a few CPC games with their…
... their speccy equivalents..
Am I shocked or what? What ... -
I am an absolute emu. nooby! Can someone please explain in steps how to run tap/zip files?I'm using the Klive emulator because it's the only one I've been able to run on my PC (Pentium 4, Windows XP). I can use sna and z80 files okay (wow!…
... other types to work. I am missing out on Knight Lore ... -
Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…
... another TR-DOS problem. I am using "LD C, command; CALL #3D13 ... -
AssemblageCan any of you marvellous programmers out there recommend a Speccy assembler that even a complete dunce could use? At the risk of sounding thick, as…
... idea how it works, but am I right in assuming that ... only four bytes.
ld bc, 99
ret
Trans Am and different Covers :)We all know there isnt a Sinclair release of Trans Am by UPG, or if there is, tis rare as rocking horse do do. But ive just been though my collectio…
... a Sinclair release of Trans Am by UPG, or if there ...I think I have some titles not in your archive, but am afraid to ask....I don't venture in here much. I don'd understand it, last time I thought I had some I didn't.... and I am embarrsed to try again... Anyway I have; …
Tranz Am with swedish instructionsAnyone interested? I have Tranz Am from Ultimate with swedish instructions. The game itself and hte front of the inlay are both english but the back …
Anyone interested? I have Tranz Am from Ultimate with swedish instructions. ...How to get Grahics to wrap vertically around the screen?I am using the following code to draw an image to the screen. First I use HL to contain ROW and COLUM I then call the MapScreenFunction As I draw m…
I am using the following code ... NextPixelLine:
inc h
ld a,h
ok1: and ...
ld a,l
ld l,h
ld h,0 ... ret
Superdraw: ld b,16
prtiv1: ld a,(de)
or (hl)
ld (hl),a
inc de ...Am I now a Spec-chum?Congratulations to me - I am now in the top 150 "posters" on the World Of Spectrum sight. And to commemorate this occasion i'm going to treat myself…
Congratulations to me - I am now in the top 150 "posters" on the World Of Spectrum sight.
And to commemorate this occasion i'm going to treat myself to a Twix at lunchtime!
:)Am I missing something here or what?Just flicking through a through Ebay auctions... [url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=50224&item=8124816887"]http://cgi.eb…
... ;item=8124816887[/url]
Am I missing something here...? Is ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... is very fast (As I am overwriting the background), but tips ... /> ; MOVE RIGHT
right:
LD A,(IX+2) ; x graphic ... :
LD E,72
LD D,0
LD A,(IX ...Space-Time Website + Trans Am 2000Hi, Well after a nice little break (about 2 years actually) I've finally relocated back home to England, and have managed to throw together another …
... , plus the new remake - Trans Am 2000 - so please, help yourselves ...DEC BC/LD A,B/OR C/JP NZ,loopyesterday i saw nice trick:[code] dec bc ld a, b or c jp nz, loop can be replaced (bc starts >255, short jump) by: dec bc inc b djnz loop [/code] …
yesterday i saw nice trick:[code]
dec bc
ld a, b
or c
jp nz, loop
can be replaced (bc starts >255, short jump) by:
dec bc
inc b
djnz loop
[/code]
..niceI am looking for the game's nameI am looking for the game which was on ZX Spectrum. In this game you have to move boxes to block running ants !!! View for this game was like in che…
I am looking for the game which was on ZX Spectrum. In this game you have
to move boxes to block running ants !!!
View for this game was like in chess ( from the top ).
Please help me.PRINT AT in assembler Hello everyone, I am very new to this forums. Like perhaps many others I had a Spectrum as a child and did pretty much simple BASIC programming, bu…
... ,
I am very new to this forums. ... like this:
LD a,22
RST 16 ...
LD a,10 (x-coord)
RST 16
LD a,20 (y-coord)
RST 16
LD a,65 (character code)
So I am wondering if any of you ...I am getting an x-box tomorrow. Recommendations? On loan for quite a few months from my brother-in-law, as he has a spare one. He bought one on eBay, was outbid on another, and got a really good 2n…
... 've heard of HALO, and am guessing that should be available ...how do i read the keyboard in assembly? here is the code i tried writting to find out the value of a key call 28f (hex) loop: ld a,255 cp e jr z loop ld (50000),e ret notes from what i …
... /> call 28f (hex)
loop: ld a,255
cp e ...
jr z loop
ld (50000),e
ret
am i doing wrong with the ...Keyboard problemI have a bug in my game where the main sprite moves slightly almost as if there is data left in a keyboard buffer. I read the keyboard using code alo…
... lines of:
[code]
LD A,251
IN A ... not reading from a buffer. Am I correct in this assumption ...I am 34 years old today.I feel like I am about 17 years old, unless I run upstairs or play football or something, then I feel about 40. :D I can legitimately get smashed…
I feel like I am about 17 years old, unless ... on Saturday, and then I am free until about November 6th ...I have become a shamen. I see, I am blind and I understand I am a shamen. I am. I've been there, and done it. I see things people can't see. I've tripped, and seen things, most would not want to see. At time…
I am a shamen. I am. I've been there, and ... .
I am a ordained minister in the ... over this festive time, I am here to offer advice to ...Grell And Falla - Am I doing something wrong?OK, anybody remember a game called Grell and Falla in the Enchanted Gardens? It was one of the Codies last budget releases on the Speccy, and quite a…
... , not even a sound FX. Am I doing something wrong? I ...
