-
Making a mapI should learn Z80 assembly, but I don't have the time (really busy) and I feel like making a game. I've tried with Colt which gives me enough speed…
... /> Lower Upper Printer
LD A,0 LD A,2 LD A,3
CALL #1602 ... -
How to program Machine Code on a PC, and then run it on a speccy?Well, I've been looking into MC a bit more deeply recently - I reckon I could get my head round MC now. Back when I was a teenager, I couldn't see th…
... like to use instructions like ld a, lx and so... yes, u ... -
Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... /> ld a,(ay_inc)
ld l,a
ld h,
ld d,8
ld ...
ld a,(ay_inc)
inc a
ld (ay_inc),a
cp 0 ... -
Why Hex in place of Denary?Ok - most MC books / tutorials advocate the use of hex instead of denary. But the Speccy doesn't actually have a Hex converter so you need to write …
...
ld b,0
ld a,(30000)
ld c,a
ret ... 117 translates to an opcode LD (HL),L, so your ... />
ld (hl),l
ld c,a
ret
So if the A register ...
ld b,0
ld a,(30004)
ld c,a
ret ... -
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
... add hl,de
ld a,(hl)
; a = array index
a,MyArray%256
ld l,a
ld a,0
adc a,MyArray ... /256
ld h,a
ld a ... ,(hl)
; a = ... -
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
Why not simply
ld hl, MyArray
ld a,(hl)
too obvious I suppose. BTW, the speccy has index registers too, which would appear to be perfect to access arrays in memory. Are there any performance hits in using them though? -
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
... simply
ld hl, MyArray
ld a,(hl)
... IY). Typical instruction:
ld c,(ix+5)
ld c,(ix+a)
which doesn ... the index is typically a constant and not a variable.
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
... you wanted to print such a string, you would perhaps do ... of the string
loop: ld a, (hl) ; get first character
display the value in a
inc hl ;move to ...help with sprites from SevenUpHas anybody got source for a short m/c rountine that can send sprites designed in SevenUp to the screen or to a dummy screen? A long time ago, I wor…
... start address for a sprite in Misc ... br /> INC H
LD A,H
AND 7
LD A,L
ADD A,32
LD L,A
RET C
LD A ... ,H
SUB 8
LD ... H,A ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... into sample data
ld a,h ; if 0, ... volume setting
ld c,a
add ... ld a,pitchfrac ; 8 bit binary fraction
add a,remainder
ld (remainder),a ... ; pokes byte into prev. add
ld ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... the appropriate page into A, then...
; ld bc,32765
; ... out (c),a ; move to appropriate page
ld l,h ... restrict it to a certain page...
ld a,(hl) ; fetch ... byte of lookup table
ld a,(hl) ; final sample output level ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
...
ptr:
ld bc,ptr
ld a,b
or c ... -- apply volume to sample
ld a,(bc) ; 6 bit sample
ld a,pitchfrac
remainder:
add a,remainder
ld (remainder+1),a
ld ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... ld a,pitchfrac
remainder:
add a,remainder
ld (remainder+1),a
ld ... ld a,1 ; "ld bc" or "jp" mnemonic
ld (ptr),a
repeatstart:
ld ... '
ld l,a
ld h,msbvoltbl
ld a,(hl)
Does Screen Flipping work on a 48k Spectrum?On the other post it showed some basic code to flip the screen on a +3. Does it work on a 48k Spectrum. Can anyone show me the machine code to: Se…
... /> [code]
LD HL,16384 'start screen< ... of screen
LOOP LD A,(DE) 'fetch value backupscreen ... from LDI
LD (HL),A 'write backup to ... to compensate
LD A,B 'test for end ... /> The test
LD A,B
OR C
How to get Grahics to wrap vertically around the screen?I am using the following code to draw an image to the screen. First I use HL to contain ROW and COLUM I then call the MapScreenFunction As I draw m…
... /> ld a,h
sub 8
ld h,a
NextPixelLn_1:
ld a,l ...
add a,32
ld l,a ...
ld a,h
add a,8
ld h,a
ld a,h ...VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
[code]
interrupt_init:
ld hl,0xBE00 ; create a table of 257 bytes ...
ld de,0xBE01 ; so ...
interrupt_on:
di
ld a,0xBE ; point I to table ... at 0xBE00
ld i,a
im 2
new programmer needs information hi , i have been learning c++ for a while and am trying to make games using windows but being 28 and nostalgic , i thought it would be fun try and f…
... 23683 with 25
ld a,2 ; load A with the stream number ... tab
-g3 to dump a bin file (see TASM manual ... assemble file
prog.bin a code file which can be ... imported to a emulator. Rememeber to Clear the ...16k/48k Sound FXI am now moving on from graphiocs to trying to build up a library of sound fx to be used with a 16k/48k Spectrum. Does anyone have any example m/cod…
Here is a ZAP effect using the Beeper< ... : LD BC,180
LD HL,10
ZAP3: LD DE,4
LD A ...
;change frequency
DEC A
JR NZ,ZAP4
16k/48k Sound FXI am now moving on from graphiocs to trying to build up a library of sound fx to be used with a 16k/48k Spectrum. Does anyone have any example m/cod…
...
noise0 push bc
ld a,(hl) ; next "random" number.
out (254),a
ld a,e
cpl
noise1 ... noise0
pop de
ld a,e
sub 24 ; size ...16k/48k Sound FXI am now moving on from graphiocs to trying to build up a library of sound fx to be used with a 16k/48k Spectrum. Does anyone have any example m/cod…
... /> RandomBit: ld hl,(RandomSeed)
ld a,h
rlca
ld d,a
rlca
rlca
ld e,a
ld a,l ...crashonlineI don't know if anyone from here is involved in this website but I think it is truely amazing representation of Crash as it was and I love visiting i…
Wow! Isn't it a small world Gerard!
Maybe we could start an Alloa Real Spectrum Enthusiasts club or, for short, A.R......on second thoughts lets not bother ;)MC 101Hello Group Members: Can't spectrum MC be embedded in a BASIC program
... /> RandomBit: ld hl,(RandomSeed)
ld a,h
rlca
ld d,a
rlca
rlca
ld e,a
ld a,l ...found old magazineHello fellow Spectrum worshipers :) As I was not sure where to post this, so I posted it here. I guess anything can be posted under miscellaneous. …
... hardware...
Give me a R Tape Loading Error any time. :)Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... 6
case7:
ld c,a
ld a,d
ret
case2:
ld c,a
ld a,d
ret
ld a,b
ret
case3:
ld c,a
ld a,b ...
or a
ret
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... /> LD B,A ;collision with
ADD A,16
LD C,A
LD A ... )
LD B,A
ADD A,16
LD C,A
LD A,D ... )
LD B,A
ADD A,16
LD C,A
LD APixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... Y-coor
LD C,X-coor
LD A,B
... CALL #22B1 ; HL returns screenaddress
; A returns ... /> LD C,A
LD B,0
ADD HL,BC
LD A,(HL ...Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... written as follows:
LD A,C
AND 248
LD H,(HL)
LD L,A
LD A,C
AND 7
LD DE ... A,E
LD E,A
LD A,(DE)
XOR (HL)
LD (HL),A ...
