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How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
... I think). I use this to load memory address 32499 ($7EF3) with ... button check
CB CA SET D1. 'A' has been ... button check
CB DA SET D3. 'P' has been ... button check
CB D2 SET D2. 'O' has been ... button check
CB E2 SET D4. 'M' has been ... -
48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... Spectrum PSU with no load. It'll drop to around 11V once ... with your bench power supply set to 9V - though I don't ... think that's going to solve your problem. Clearly something ... -
New game: Funky FungusHappy Easter folks! What's better to do during these Spring holidays than playing some new game on our Spectrums? ;-) And lo, here is... [center] [y…
... ESXDOS! :)
I set the file to load by typing .tapein first ... seems to have problems with headerless blocks - it won't load them ... -
Varios +3(e)DOS questions?I'm converting tape games to disk, for being used in my +3e. I'm trying to convert them to standard BASIC loaders, so files could be copied using BAS…
... ? What could I expect to find in commercial loaders?[/QUOTE ... This will usually switch back to a normal configuration fairly quickly ... where registers will have been set up indicating the location & ... ownotes.txt]Operation Wolf[/url] to give a (probably confusing) ... -
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…
... tape would seem to be the obvious way to do it.[/QUOTE ... load/save function?
Basically, I would need to be able to load ... in a set of test data ... , save the results, then load the next set of test data and ... -
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…
... call $04C2 ;SA_BYTES
to load: A=$FF, DE=number of ... then the tape needs to be repositioned, which can ... got to be rewound & restarted to get back to the ... Can you hold a full set of input data & ... just LDIR the output block to the input block.
... -
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... extra time can be used to load initial values into register pairs ... ',DE',HL',IX,IY and to set SP.
Normally ... you would need to update 8 times each multicolor ... row would be still available to execute another initialization of all ... -
Spectrum loading: the single 'note' soundHello everyone, can anyone explain what is happening when during loading, the tape emits what seems to be a single, usually high pitched note, in bet…
... built in to save and load data at a set speed. ... similar program but designed to load data at a higher speed ... need to be.
The Spectrum save/Load routine ... your very own turbo load/save routine in RAM. ... all a very simple concept to be honest - once ... -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
... much easier (and more authentic) to load and save files and programmes ... />
I have been able to load and run software (.TAP files ... card (and how to designate which folder to transfer to).
... a diary entry than a set of questions as such, but ... -
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…
... 2 if the bits are set and 0 if they're ... the number of bytes left to load) and L (the register in ...
CALL 85E4
;; load attributes into screen RAM, forwards ... it isn't possible to, say, load the screen attributes into high ... -
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…
... :target address of next byte to load.
loader_entry:
di ... ], "47loader_screen_demo.tzx", that uses it to load a screen. The turbo block ... :
[CODE] ;; set this test program to load a screen
ld ... -
WAV filesI have tried Google bot so far no real luck. But are there any sites oyut there that has got ZX Spectrum game files in WAV format? I can of course t…
Tapir, available from this site. Works brilliantly! Just select "Play to WAV" from the pull down.
[url]http://newton.sunderland.ac.uk/~mikie/[/url] -
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…
... :target address of next byte to load.
loader_entry:
... ; (on high edge, carry now set)
jr z,.read_edge_loop ; loop ... br /> or 8 ; set bit 3 to make sound
out ... -
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…
... can now be set to about 75% for a successful load), I still ... can't get the thing to load from tape.
I ... wonder if changing your code to use these values this might ... -
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…
... :target address of next byte to load.
loader_entry:
... start again if carry set
;; indicate load error by clearing both ... ; (on high edge, carry now set)
jr z,.read_edge_loop ; loop ... -
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…
... ;;
;; start by initializing C to a sane value as if ... pulse, the next comparison will set
;; carry
cp ... with both strategies when trying to load a deliberately-mangled 8000Hz ... It's just a load of source at the moment ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... figured its best to move on to DEC, a blatent ... that the registers are set to the initial state you ... this opertunity to load the value we want to manipulate and ... br />
Tells processor to do nothing,
to sell my soul to get a listing to work ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... LD. As to my mind after you learn to load a value ... [code]
CBC7 = SET 0,A
CBCF = SET 1,A
CBCE = SET 1,HL
CBD6 = SET 2,HL
set BC,
Next set the bit ... the HL pair SET codes, you only get to play with ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... d'etre for the alternate set was to allow fast interrupt response ... I use the alternate set for is to run two related but ... /> I also use the alt set to hold parameters when indexing into ... number of bytes to write (BC). A quick EXX, load HL with ... -
Tutorial: ZX-Paintbrush and BIFROST*The latest version of [URL="http://www.zxmodules.de/"]ZX-Paintbrush[/URL] now supports editing multicolor tiles as used in [URL="http://www.worldofsp…
The easy way to import graphics into ColorTILE in an emualtor is to load a normal screenshot during editing. The lower two thirds of the screen will then be used as the bitmap for the relevant 128 tiles. Then all you need to do is set the colors. -
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…
... At the end of the load, verifying the checksum is thus ... 47loader exits with carry set to indicate a successful load, so I do ... ,1 ; increment accumulator and set carry if zero[/code]
load really is good. Flashy border ... -
Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…
... the other did load.. the tape deck itself was set to record all ... was slightly modified. I guess to just relay the signal but ... post about how he used to hate microdrive carts. -
Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…
... the other did load.. the tape deck itself was set to record all ... was slightly modified. I guess to just relay the signal but ... wonder how it would compare to a disk system that could ... , if it crashes, go back to saved state)
PS ... -
The making of R-Type on the speccy book, free downloadBob Pape, the guy who wrote R-Type on the speccy has made his book, "IT'S BEHIND YOU: the making of a computer game", available for free download: [u…
... that's not a massive load (1,000 bytes of screen ... meant), but now I have to guess that scrolling could be ... the pointer from one character set to another (and updating the screen ... -
Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…
... 49152.
I set USR0 mode through a small ... this one[/URL] and proceed to load the BASIC management program, ... />
[... CLEAR as needed, load decompressing routine and various other ... ...]
100 OUT 32765,17: LOAD "level1" CODE
... -
128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…
... shifting down RAMTOP close to STKEND while still ... replaced with calls to alternative routines. To preserve the GO ... "LOAD OK": GO TO 9006
9000 REM GO TO 9000 to ... scf ;A =$ff, Carry set for LOAD
ld ix,22528 ... -
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…
... br /> It is now possible to convert 47loader blocks into standard ... adjusts its timing constants to fit standard speed data. ... set to -2, yielding timings of 475T/950T. Amazingly, this does actually load ... demo of a standard-speed load.
[*]lims_hybrid.tzx ... -
Lime Rick, like Snake but with gravity[B]Lime Rick[/B] by [url=http://www.kissmaj7.com/games/]Kissmaj7[/url] is an elaborated version of "I Left Myself Behind". It's a puzzle game with an…
... think that a possibility to load an additional level set is the most ... . As for the different graphics set or loading screen... I dunno ... enough, you don't have to eat all appples, just one ...
