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A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... 140.gif[/IMG]
[CODE]
/****************************************
sp1 ... br />
// C and SP1 code libraries are added here.
uchar dy; // signed vertical speed in pixels
};
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 : ...joining lines of BASICDue to overwhelming demand - well, one demand - well, more of a suggestion, really - here's a routine to join together lines of BASIC. The vertical c…
... lines of BASIC. The vertical cursor motion code is based on the ... reorganised & condensed; the joining code is new. LOAD at 65023 ... to be entered?
[code]
K48: equ $FDFF ;65023 ... ;ENTER
jr SET_K
[/code]Sevenup - bug or feature ?I have noticed a very peculiar behaviour of this great utility. I have for example a picture of 3 vertical lines which is 19 pixels high and 16 pixe…
... example a picture of 3 vertical lines which is 19 pixels ... it with Sevenup:
[CODE];GRAPHIC DATA:
;Pixel Size ... ,255,255,255,255,255[/CODE]
The picture is ... 8 horizontal pixels. But in vertical dimension there aren't any ...Kobrahsoft: Code InvestigatorHi folks, While digging around my HD I found an "Unknown Kobrahsoft Tape" which appears to contain the MIA title Code Invesitgator by Kobrahsoft: [u…
... to contain the MIA title Code Invesitgator by Kobrahsoft:
[url ... /> Anyway it loads with LOAD "" CODE but doesn't seem to ...editing strings with INPUT LINEHere's the latest in my unpredictable series of utility routines. This one I needed for the SAGE game editor; it emulates INPUT LINE l$ but with the …
... be used; just POKE LNAME,CODE a$ (where a$ contains the ... the string).
The vertical cursor enhancement from "joining lines ... uses the WORKSP area.
[code]
K_CUR: equ 23643
LNAME: defm "l$:"
[/code]Code optimisation - can you help?Hi Folks, I have been looking at the following code fragment for days and I have been able to improve its performance quite a bit. However, it is a…
... been looking at the following code fragment for days and I ... can make.
[CODE]...
350 LET h=INT ... /> AT 32,l;v$(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 ...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. …
... black display with thin red vertical lines.
Next, the ... RAM-READ section of ROM code passed from testing lower RAM ... .png[/IMG]
The vertical white markers show the times ...Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code: [CODE] ;; ram-check L11DA: LD H,D ; Transfer the top value to the HL register LD L,E …
Here is the inefficient code:
[CODE]
;; ram-check
[/CODE]
And ... faster routine:
[CODE]
;; ram-check
... to last valid location.
[/CODE]
Another ...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 ...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 ...BIFROST* Advanced Programming - part 1In BIFROST*, it's much easier to just make changes in the tile map and let the engine automatically draw & animate everything in multicolor for you. …
... post it here?
[CODE]/* ----------------------------------------------------------------
* BIFROST* ENGINE HI-DEMO ... /> int dlin[NUM_TILES]; // hi-res vertical tile movement
int dcol ...BIFROST* Advanced Programming - part 2This second demo shows animated and moving tiles together, and also how to implement collision detection. This knowledge should be enough to implemen…
... the same way:
[CODE]/* ----------------------------------------------------------------
* BIFROST* ... dlin; // hi-res vertical tile movement
int ... /> }
}
}[/CODE]
The compiled ...BIFROST* Advanced Programming - part 3This new demo demonstrates the BIFROST* built-in sprite support that I mentioned before. In BIFROST*, "sprite tiles" are 2 special tiles that BIFROS…
... draw the player:
[CODE]/* ----------------------------------------------------------------
* BIFROST* ... , dlinPlayer; // hi-res vertical sprite movement
int ... 0;
}
}
[/CODE]
The compiled version of ...Interview with Steve Wetherill (Odin)Hi you all!!! Here is the interview done to STEVE WETHERILL (Nodes of Yesod, Robin of The Wood, Arc of Yesod, Heartland... ?Odin!) and published at […
... methods to download the assembled code to the target machines, ... had previously developed music driver code and composed music for ... have had time to add vertical jumping and platforms to Heartland ... , especially Cobra. His scrolling code was second to none.
BIFROST* Advanced Programming - part 4In previous posts I demonstrated how to move multicolor tiles up and down smoothly by a single pixel, and sideways by an entire char (8 pixels). Thi…
... implementation:
[CODE]/* ----------------------------------------------------------------
* BIFROST* ... NUM_TILES]; // hi-res vertical tile movement
... /> }
}
}[/CODE]
The compiled ...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 ...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 ...BIFROST* Advanced Programming - part 5In my [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40437"]previous post[/URL] I demonstrated how to move multicolor images smoothly i…
... in different situations:
[CODE]/* ----------------------------------------------------------------
* BIFROST ... linPlayer; // hi-res vertical tile position
int ... }
}
}[/CODE]
A compiled version of ...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 ...BIFROST* Advanced Programming - part 6The purpose of this demo is somewhat different from previous ones. Instead of teaching a new technique, the main goal here is to demonstrate how much…
... listing is as follows:
[CODE]
/* ----------------------------------------------------------------
... * 20 LOAD "tiles"CODE: LOAD "tilemap"CODE
* 30 ... int linPlayer; // hi-res vertical tile position
int ...Optimisations 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 ...Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …
... underlying colour alone:
[CODE]
;
; Output of Messages ... /> .msgfir defm " PRESS FIRE "
[/CODE]
On entering the ...Speedlock Source CodeOooh - found some interesting Amstrad/Spectrum Speedlock source code over at [url]http://web.archive.org/web/20070126232648/http://andercheran.aiind.…
... interesting Amstrad/Spectrum Speedlock source code over at [url]http://web ...Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... 'm adding support for reading code execution logs produced by emulators ... of working out what's code and what's not in ... can do some kind of code execution logging or profiling, for ...New Game: MODERATE RETRIBUTION.[IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/MODRETinlay_zps4d03e7ae.jpg[/IMG] You look skyward through the sash windows of your spa…
... a draft for a scroller I may code myself this year. Let ... I do write my own scroller I'd be especially interested ...
