-
Draft specs for TZX v1.20Hi all! In the attempt to restart the development of the TZX format, I've put online the first version of the draft document [1]. At the moment ther…
... in the test tapes :) This is what you could call a semi ... -
Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... a small and incredibly simple routine which solves the lack of ... /> Q. How does the randomize routine work?
A. ... Spectrum ROM Disassembly shows the routine.
If the parameter ... for at least the first call after snapshot re-loading.
Ping Pong tzxI can't get the tzx file for Ping Pong by Imagine to play on Spectaculator or TAPER properly. Strange non-loading sounds, like beeps, start occurring…
... full swing, the dumpers would test the tapes in Real Spectrum ... can identify and skip the routine that listens for such beeps ...Convert x,y to Attribute Address in AssemblyWhat is the fastest way, given x,y (in hl) to return the attribute address?
... , but without CALL (17T).
Since the total routine costs 10 bytes ... would (for speed) program the routine everytime when needed, saving the ...Detecting TR-DOS from BASICIs there a simple (or contrived :D ) way to detect the presence of a TR-DOS/Betadisk interface from BASIC? For fairly obvious reasons this can't rel…
... /> There is a system call to test for the presence of the ...What's the RAND USR code for the test screen?And what versions of hardware does it work on? Ta!
... " routine in the spare space but I thought that the test screen ...Detecting TR-DOS from BASICIs there a simple (or contrived :D ) way to detect the presence of a TR-DOS/Betadisk interface from BASIC? For fairly obvious reasons this can't rel…
... have to trap the error routine yourself or you'll drop ... lot like how you'd call the +D/Disciple DOS, not ...Mess around with basicIf you have a game that was written in basic, e.g Football Manager, how do you look at the code that was used? thanks
... that you don't call a ROM routine, would become many hundreds ...Mess around with basicIf you have a game that was written in basic, e.g Football Manager, how do you look at the code that was used? thanks
... couple of Z80 instructions to call the common run-time.
routine.
[quote]
On ...ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …
... calculate the address by this routine:
[code]
RST_START POP ... HL : save RET Address after call address
EX DE,HL ...ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …
... br /> RET ; return to calling routine
; *******
after_page1:
RET ; call routine that was pushed on stack ... hence call our desired routine.
When this routine ... desired call address for the routine in ...Beginner InfoI have trying to find some hardware information for use with assembly coding but havn't had much luck. For instance. How do I redirect the vertical …
... 'keypress'
BIT 0,A ; Test for the 'a' key
routine
[/code]
If ...What do you think.Do you think if you went back in time and made a Sudoku game for the spectrum you would be a millionaire now? (all my get rich quick schemes invole …
... RST for jump to own routine with a SYSVAR, something like ... use a RST for a call to my own software.What do you think.Do you think if you went back in time and made a Sudoku game for the spectrum you would be a millionaire now? (all my get rich quick schemes invole …
... RST for jump to own routine with a SYSVAR, something like ... use a RST for a call to my own software.
[/quote]
and call it CPC6128? (well almost :lol:)Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... PRINT position, and call the ROM's PRINT routine. It saves you ... random number - just call the ROM's random routine, it's good ...Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... why a game would call an address in the ... and sometimes the print screen routine for menus.
... seeing as it can only call 6 set addresses, all ... be regarded as a fast CALL, you could place commonly ... would be an o/s call; an NMI interrupt generated ...Assistance with IM2 routineI subsequently got a working IM2 routine.
... ]
org $efff
defw routine[/code]
This is a ... to pick an address to call, will always be $ff.
call.
As I understand ... table would be used to call a specific function, the address ...Run Length DecodingRun length encoding/decoding is far less efficient than using a modern compression program.
... ), a
push af
call slow_downhl
pop af
ld (hl), a
call slow_downhl
dec c
this is pretty stupid routine, if i REALLY want to ...FP Calc QuestionWhen using the FP Calc (RST 28h) to perform a subtraction how do you find out what the sign of the result is? ie. +/-. For example if I stack two va…
... you are using the ROM routine FP-TO-BC then the ... .
You should therefore test, or preserve the flags immediately ...Has this been done before?Are there any emulators whose speed can be adjusted by the Spectrum program that the emulator itself is running? So that, say the Spectrum program ca…
... wait from a requester to test this feature first in his ... Quake seemed to use (to call up the console), then the ...+3 disc imaging (idea + SDP)Following a bit of research, which you can probably see in the "old code" thread, I had an idea for a bit of software that may be useful (for me, and…
... "user0" i prefer a MC routine which set bit4,
it ... menu with options, which would call MC functions to analyse and ...+3 disc imaging (idea + SDP)Following a bit of research, which you can probably see in the "old code" thread, I had an idea for a bit of software that may be useful (for me, and…
... the ROM/RAM stuff) is call some +3DOS routines to log ... calling the +3DOS read track routine, dumps the track contents to ...Shoot-em-up Development UpdateHi Folks, I am still working away at my horizontal scroller. Here is a link to let you see progress. I have re-written the scrolling routine to make…
... />
The routine is still basically the same ... New];=====================================================================
; SCROLLING ROUTINE WITH 2 PIXEL PRECISION
[FONT=Courier New] CALL RENDERTILES[/FONT]
...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... request, sorry :smile: The output routine really needs to be more ... the programmer makes an API call. Now, having a set of ...how to pass arguments from Basic to MC ?can someone explain me (or give some link) how to pass arguments from basic to machine code? i mean something like this: PRINT USR xxxxx, arg1, arg2:…
... the registers.
So to call a machine language function you ... CODE:
org 30000
call DrawImage
ImageY: defb ... />
This would call a drawimage machine code routine passing in the ...how to pass arguments from Basic to MC ?can someone explain me (or give some link) how to pass arguments from basic to machine code? i mean something like this: PRINT USR xxxxx, arg1, arg2:…
... memory, then in your MC routine you'd pick the numbers ... used DEF FN functions to call the code, which could be ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... a time. With the CreateSpr() call, you create the sprite with ... that use the new version. Test programs mainly. Give me a ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... moved.
With a call to sp1_UpdateNow(), the list of ... . When the colour sprite API call is made, it traverses the ... optimizations in the move sprite routine that tries to avoid making ...Speccy Games for Motorola v220Does anyone know where I can download Speccy games for my phone (Motorola v220), specifically Manic Miner and Jet Set Willy? I would love to play th…
... through the routine of getting it (a 5 minute premium call by ...
