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machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…
... /> LD ($5C3D),HL ;(ERR_SP)
rst 8
defb 255
RST 8 repositions SP to point ...
DEFB $00,$1B,$00,$40,$00,$80
[/code] -
Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…
Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... ,5,2,1,224,16,40,40,8,232,16,224
RST 16 command - I won't ... character just like PRINT....or RST 16)
pop de
40,40,8,232,16,224
Arkanoid - Hit Squad ReleaseInfoseek (and the [URL="ftp://ftp.worldofspectrum.org/pub/sinclair/games/a/Arkanoid(TheHitSquad).tzx.zip"]TZX[/URL] itself) identifies the Hit Squad …
... , l_e54f ; e54c 28 01
rst $00 ; e54e c7
l_e54f ... , $40 ; e560 3e 40
out ($7f), a ; e562 d3 7f
rst ...Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
... INT (RND*500)
40 PRINT o;": ";dividend;" is ... undo USR
GETARG: rst $20
call SCANNING ...
rst $18
cp ","
call STAKBC
rst $28
defb $04 ...Tool for saving prog op codes in one neat column?[deleted]
... ,(IY+1)
28B6 DF RST 18
28B7 CD8D2C CALL ... C,A
28C1 E7 RST 20
28C2 E5 PUSH ...
28C5 2828 JR Z,+40 28EF
[/code]
Unfortunately ...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…
... another key
a4bc c7 rst 00h ; reset computer[/CODE]
a4bc c7 rst 00h ; reset computer[/CODE]
Fixed using POKE 42166,40: POKE 42167,4
Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... but the tune takes 40 seconds to play instead ...
add a,%01000000 ;$40
ld h,a
cp $40
jr c,ERRORQ
ret c
ERRORQ: rst $08 ;ERROR_1
defb $ ...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…
... = calculator code for VAL
rst $28 ;FP_CALC
defb $34 ... ;execute_B
defb $34,$40,$B0,$00 ;stk_data (small integer ... (RND*4))
defb $34,$40,$B0,$00 ;stk_data (small integer ...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…
... /> defb 0,28,42,40,28,10,42,28
40
ycoord defb 0 ... ret
;*********************************************************************************
; the RST $10 replacement routine
; accepts ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Disentangling your code looked too much trouble, so I wrote a quicker BASIC version then an assembler version of that (although that's rather slow even so). It could be written to run more quickly by not using the FP calculator but I expect that it would ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Here's a much quicker version; the BASIC now only takes 50 seconds, and the assembler is reduced from 318 secs to 17 secs. There's still scope for further improvements. The significant change is that it only executes the inner Y loop with valid plot points ...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…
... ,7 vs ADD 7 or RST 0/1/2/3/4 ... /6/7 vs RST 0/8/16/24/32/40/48/56 ...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…
... ,7 vs ADD 7 or RST 0/1/2/3/4 ... /6/7 vs RST 0/8/16/24/32/40/48/56 ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... BC
rst $28 ;FP_CALC
defb $34,$40,$b0,$00,$03 ...
add a,48
rst $10
inc bc
Outputting debug trace to RS232 (assembly)Hi Guys, I'm working on a game at the moment (written in assembly) but I am really needing to write out a debug trace of what is going on with the p…
... ;TAB 8;PEEK 23747
40 GO TO 10
50 ... (at the ORG point). The RST 8 works, and IF1 pages ... in but it crashes (RST 30 at 00BCh in IF1 ...TXT2EMU enhancementI was looking at the encodings supported by BAS2TAP for entering graphics, print controls, etc. as plain text. Basically, there's only one needed, be…
... upon whether or not the 'RST 8' paging interrupt was invoked ... ),$0B ;**
ld (ix+01),$40 ;**change error return to $400B ...FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... () __naked {
__asm
rst 0x08
.db 0x1d
75 ;serial.c:40: __endasm;
0007 FD 21 ... iy)
0010 CF 79 rst 0x08
0011 1E 80 ...Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... =-255=-175+USR DOTS
40 PLOT 127,0: LET bc ... : JR Z, L_24EC
L_24F9: RST $08
LD A, (BC ... )
RST $18
DEFB $0A
Meaning of Format Byte of a TRDOS DiskDoes anybody knows the Meaning of the Format Byte (Byte 227 in Sector 8 (Sector Count from 0) in Track Zero) of a TR-DOS Disk (Real Disk of a Bet…
... ,#29E2 ;DISC ERROR message
RST #18 ;display it
JR ...The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
Here's the (untested) rst part and the bootstrapping in ... 19 bytes.
[u]RST code[/u]
[code]
40?
(3) jp nc,buggy ...
