-
AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... ^b" so it can return zero if the bit is reset ... and non-zero if it's set. Note ... ,OPTIONS+14
cpdr ;check code
jp nz,ERRORA ;return ... ,$87, $CB,$C7
[/code]
[code]
10 FOR a ... -
probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…
... using the 'hello world' code borrowed from [url=http://equant ... a game.
[code]
ld hl,line ; Print ... ; Loop round
[/code]
the first time ... perfectly valid chunk of zero-terminated text and I ... -
Sopa De Letras (missing code)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0025520&loadpics=3"]Sopa De Letras[/URL] Code: CI-013 As per [URL="ftp://ftp.worldofspectru…
... De Letras[/URL]
Code: CI-013
As ... listing[/URL] and saw the code missing from there.
Odd Ball (wrong code??? AKA)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0003488&loadpics=3"]Odd Ball[/URL] The code on both the loading screen and inlay card says A-…
... Ball[/URL]
The code on both the loading screen ...Any Z80 native assembler with source code ?As in the subject - I am looking for native Z80 assembler that comes with source code.
As in the subject - I am looking for native Z80 assembler that comes with source code.BREAK from GOSUBHere's another one. Just in case you wanted to break out of multiple GOSUB levels with a single command, here's a routine to do it, tested on all mod…
... GOSUB" error.
[code]
RETSUB: LD HL ... INC B ; 4 ;reset Zero flag
EXX ; 217 ... 195 115 30
[/code]
At the end, ... required by the ensuing code at the relevant JP ...Amazonia (BUGFIX)This is a bugfix for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027280"]Amazonia[/URL], please add the following "known errors" des…
... SHOULD NOT RESET TO ZERO![/B]
9ee2 23 ... the other byte is already zero)
9ec5 21e99b ld ... reset minutes/hours/days to zero
9ee2 23 inc ... : 02 EXIT ; exit
[/CODE]
Fixed using [B]POKE ...PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…
How do you go about it?
If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it?
I wouldnt know where to start... :confused:Best mag to learn programming Machine CodeDear all, Back in the day, I was a Crash reader; I loved it. However, not having the money to buy the other big two mags on offer in the UK, I was n…
Souce Code for Midnight ResistanceI just saw this on ebay and was wondering if this was the real deal. Does anyone know ? [url]http://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-Midnight…
... -ZX-Spectrum-Midnight-Resistance-Source-Code-Jim-Bagley-/110778560627?pt=UK_VintageComputing_RL ...storing machine code in BASICA couple of years ago I posted a routine for storing machine code between PROG & VARS, based on an idea in Toni Baker's "Mastering Machine Code". Thi…
... a routine for storing machine code between PROG & VARS, ... Toni Baker's "Mastering Machine Code". This enables any attendant m ... ):
REM INSTALL MACHINE CODE... with GO TO 9161
CODE space
9161 CLEAR : ...Kobrahsoft: Code InvestigatorHi folks, While digging around my HD I found an "Unknown Kobrahsoft Tape" which appears to contain the MIA title Code Invesitgator by Kobrahsoft: [u…
... to contain the MIA title Code Invesitgator by Kobrahsoft:
[url ... /> Anyway it loads with LOAD "" CODE but doesn't seem to ...Code optimisation - can you help?Hi Folks, I have been looking at the following code fragment for days and I have been able to improve its performance quite a bit. However, it is a…
... been looking at the following code fragment for days and I ... can make.
[CODE]...
350 LET h=INT ... /> AT 32,l;v$(CODE i$(3)+v(2),2 ... 10);(CODE i$(4)-h*16)*65536+CODE i$(6)*256+CODE ... ):
LET h=INT (CODE i$(32)/16):
LET ...DJ Puff (Code Masters)[url]www.worldofspectrum.org/infoseekid.cgi?id=0009341[/url] I wasn't sure where was best to put this but there's one bug in the code that I wanted …
... 's one bug in the code that I wanted to report ...extension to Z80 opcodes spreadsheetI've set up an extra Excel spreadsheet which references Einar's v.helpful Z80TABLE spreadsheet and allows a list of Z80 assembler commands to be type…
... of the form:
[code]=IFERROR(IF(nextref=0,NA ... ,z80named.xls!columnname,2,FALSE))[/code]
Evaluated right to ... a column with a non-zero time in the second cell ...University ChallengeNearly two weeks ago Manchester University won the first University Challenge semi-final to get into the upcoming final against Pembroke College, Cam…
... 10x plus 25 all equals zero.”
“I don’ ... -squared plus six all equals zero.”
“FIVE!”
“ ... six minus 64 all equals zero.”
“EIGHT!!!”
“ ... expression is equal to zero.
I found ... binary in BASIC and machine code, the answer leaps out ...Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …
... whether the subtraction resulted in zero, if it did then the ... whether the subtraction resulted in zero (it should have done), if ... RAM-READ section of ROM code passed from testing lower RAM ... not decrement a value to zero, the RAM-READ loop terminated ...Keyboard problem...Hi Folks, I have hit a problem in MRT and I cannot see how to get around it. Please allow me to explain. I have a list of items from which one can…
... appropriate record and pressing ENTER (CODE 13).
This works ... " by pressing the ENTER key (CODE 13 again).
... seems to repeat. The selection code reads the keyboard again (using ... buffer? I have tried POKEing zero to LAST K for example ...Missile Ground ZeroI really loved playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0003229]Missile Ground Zero[/url] back on my Spectrum +2A, along with a…
... .cgi?id=0003229]Missile Ground Zero[/url] back on my Spectrum ...simplest method to pass a string to m/code?The statement "RANDOMIZE numvar+USR mc" is a simple way of passing a single numeric parameter to a m/c routine, as mc can retrieve numvar from the to…
... $;: but that needs some prefatory code to adjust the machine stack ... needs two statements.
* RANDOMIZE CODE "s"+USR mc: but that ... needs some prefatory code to set up a location ...Zexall or Emulator bug?Hello! I was running ZexAll in Zero, Fuse, Spin, SpecEmu, Spud & Speculator and noted that all of the emulators occasionally froze on the "scroll ?"…
... /> I was running ZexAll in Zero, Fuse, Spin, SpecEmu, Spud & ... scanning the keyboard... (the interupt code).
Soooo I was ...Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…
Skool Daze source code (and others)I suggest adding the source code for [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0004549"]Skool Daze[/URL] (available [URL="http://pyskool…
I suggest adding the source code for [URL="http://www.worldofspectrum ... br />
[QUOTE]The source code file contains a detailed list ... to Skool[/URL] (source code with list of bugs available ... Contact Sam Cruise[/URL] (source code with list of bugs available ...Hep needed with a bit of code...I've written a bit of code to make a character move across the screen, but the counter stops at 29 when the 3 lines to delete the characters trail ar…
... 've written a bit of code to make a character move ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... first piece of 'public' code so go easy on ... desperately elegant piece of code, but it does the ... not 40.
[CODE]
org 32768
jr z,foundzero ; zero is end of message flag ... />
end 32768[/CODE]z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…
... any way of profiling z80 Code for the Speccy???
code, which is a pain in ... to auto-profile the running code, I would be extremely grateful ...Machine code loopsThis might sound a bit daft, but I,ve forgotten how to do loops using th 'b' register... I want to loop this x mount of times: [CODE]ld a,r and 6 i…
... mount of times:
[CODE]ld a,r
and ... /> call 43100
call 45000[/CODE]
There is any ...appending data while saving to tapeBefore trying to do this I just wanted to check if there's a possibility that it might actually work. I have a number of string arrays which I want t…
... to save as a single CODE block, and I was wondering ... work, whereby when DE reaches zero in SA-LOOP, instead of ... saving, finishing when it pops zero into DE. There would be ... (VARS) and just save as CODE from (VARS) with the combined ...multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width isOptimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... of 3 bytes. Changing this code:
[CODE]
call exo_getbits
code)
[CODE]
call exo_getbit
code:
[CODE]
ld iy, exo_mapbasebits ...
