-
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... ,KEYTEST4
LD A,2
LD (DIRECTION),A
JR KEYTEST5 ... JR Z,MOVEDOWN
CP 2 ; Left
JR Z, ... position
LD A,C ;Every odd numbered star, move ... PUSH HL
LD A,E ; save the sprite rotation before ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... />
NUMPATTERNS EQU (PatternTableEnd-PatternTable)/2
DI ;Disable Interrupts ... /> LD A,(ENDSCAN)
LD E,A
LD IX,PatternTableEnd-2
A,E
LD C,A ;C=32*(D mod 8)+E
LD A ... -
So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…
... /> ld i,a
im 2
IntSet: ld (hl),c ; setup ... for next time
ld e,a ; current frequency
ld d ... (BEEPPORT),a
inc e
ld b,e
Boop0: ld a,r ...Speech reproduction on the Speccy - 2009 style?Thanks to Chapter 33 of [url="http://www.worldofspectrum.org/infoseekid.cgi?id=2000388"]Super Charge Your Spectrum[/url] by David Webb - "Speech Repr…
... 7FFD
LD A,(HL)
OUT (C),A
PUSH HL ... MKTB_4
RL C
RLA
RL C
RLA ;номер ... LD E,A
LD A,(DE) ;(TADPCM+..)
ADD A,A
ADD A,A
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... the z88dk C compiler makes (or indeed, a C compiler ... bad it threatened business - i.e. Windows).
... [code]
ld hl, 2
add hl, sp< ... /> You do 'ld hl, 2' because if you did 'ld ... /> [code]
ld ix, 2
add ix, sp
Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …
... nodes in Tree
LD E, (HL)
INC HL
JR Bits
Bit0: LD E, (IX+0)
Bits ... (CursorPos), HL
LD A, C
LD (CursorMsk), A
; Read ... block is located.
2) Select a Message by calling SelectString() with ...Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... (c) 2009 Andrew Owen
; -----------------------------------------------------------------------------
; ColorPRINT-48 is a MODE 2 ...
; offset
ld (hl),e ; the low byte of the ...MDOS3 on mapram?Hi! I just got my divIDE (the firmware is fatware) Is it possible to run the MDOS3 on the mapram of the divIDE? What file (.tap)should I 'run' in or…
... , but its for flashing (JP2(e) =on). I load that tap ... , I only got a 'C Nonsense in BASIC 20:2'
Thank ...MDOS3 on mapram?Hi! I just got my divIDE (the firmware is fatware) Is it possible to run the MDOS3 on the mapram of the divIDE? What file (.tap)should I 'run' in or…
... , but its for flashing (JP2(e) =on). I load that tap ... , I only got a 'C Nonsense in BASIC 20:2'
Thank ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... xor a
ld a,r
in a,(c) ; ... (23693),a
call #0d6b
ld a,2
e.tinney/timings.tap ...Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
... , 8 data bits, no parity, 2 stop bits.
The routine ... for CTS
LD A,255
OUT (C),A ;signal CTS =1 ... port
loopaddr IN A,(C) ;12
JP P,loopaddr ...FLASH EPROM programming on ZXExist any other software for rewriting FLASH EPROM or EEPROM chips on real ZX ? I know only: EEPROM flasher for original DivIDE [url]http://85.132.…
... dest > 16K
; BC = 2* len if LEN or DEST ... of pages
LD A,C
AND A
RET NZ ; ... RET
tst1 LD A,E
AND %01111111
RET ...Has any programmers recently pushed the spectrum to the limits?Hi there. Ive just discovered this great forum and I was brought up with the speccy 16,48 and then 128k. Im just wanting to know if there are any re…
... DEMO1 XOR A
LD (STRTLN),A
LD L,A
LD ... H,A
LD A,24 ...
LD (DEPTH),A
LD ... H,A
LD L,C
LD D,A
LD E,B ...
LD (HL),0FDH
LDIR
IM 2< ...Question about operations and target numbers[size=1]Title should say *operators. It's been a long day.[/size] :p One of the homework problems my kids are working on consists on using a set of …
... br /> 2,2,4,5 = (2*2)+(4*5)
2,2,3,8 = (2/2)*(3* ... a=b OR a=c OR a=d OR b=c OR b=d OR c ... PRINT AT 1,0;"a=";a;" : b=";b;" : c=";c;" : d=";d,
... br /> 102 LET e$="("+STR$ a(c)+b$(z)+STR$ aQuestion about operations and target numbers[size=1]Title should say *operators. It's been a long day.[/size] :p One of the homework problems my kids are working on consists on using a set of …
... br /> 102 LET e$="("+STR$ a(c)+b$(z)+STR$ a(d)+")"
110 ... IF d$="/" AND VAL e ... /> 115 LET a$=c$+d$+e$
116 PLOT x2,2: DRAW 0,3 ... ,0;"Search complete.","Numbers: ";a(1);",";a(2);",";a(3);",";a(4); " Target: ";answer,: ...The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... /> 1 xor a
2 ld c,a
3 ld b,a
4 ... br /> 16 ld e,8
18 ld a,b
...
33 inc c
34 dec e
35 jr ... nz,16
37 ld a,c< ... br /> 38 and a
39 jr ... call lprint
53 ld a,13
55 call # ...Windows 7 & X-arcade joystick questionHi guys, My first post here. I'm hoping somebody will be able to help me out. I've recently built a new pc and was looking to try and relive some ch…
...
P1 Button 7=C
P1 Button 8= ...
P2 Button 5=E
P2 Button 6=[< ... direction in Step 2, press and hold a key on the ... keyboard button selected in step 2. Release the held button / ... why I recommend choosing a Spectrum emulator that will allow ...AY programming and notes frequencyHello everybody, I'm Targhan from the french CPC group Arkos, perhaps you've heard of us. I'm currently working on a music tool and I'd like to k…
...
;NoteTableCreator (c) Ivan Roshin
;A - NoteTableNumber*2+VersionForNoteTable
;(xx1b ... c,pd_nois
add a,e
jr c,pd_esam
add a,a
ld e,a ... />
T_PACK DB #06EC*2/256,#06EC*2
DB #0755-#06EC ...Creating a Spectrum game that won't load...Dear All, I have recently been using my ZX Spectrum as a reference for the production of a new body of art work and something I keep coming back to …
... H
JP P,SALEAD ;2 sec leader
...
OUT ($FE),A
LD A,%00001101 ;MIC off, brd ...
SALOOP LD A,D
OR E
JR Z, ... br />
SABI2 LD A,C
BIT 7,B
XOR A
INC A
SA8BIT ...AY programming and notes frequencyHello everybody, I'm Targhan from the french CPC group Arkos, perhaps you've heard of us. I'm currently working on a music tool and I'd like to k…
... Mhz AY (128)
ld a, 2 ; 1.75Mhz AY (Pentagon)
;NoteTableCreator (c) Ivan Roshin
;A - NoteTableNumber*2+VersionForNoteTable
;(xx1b ... c,pd_nois
add a,e
jr c,pd_esam
add a,a
ld e,a ...
