-
Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... /> add hl, hl
ld de,#_yofs
add hl,de
ld e,(hl)
inc hl
ld ... /> ld h, #0x00
add hl, hl
add hl, hl
add hl, hl
ld e,-4 ... -
Bug in ZX SpinADD HL,BC sets Z-flag when adding #faff and #501. By design ADD HL,rr does not set zero flag.
ADD HL,BC sets Z-flag when adding #faff and #501.
By design ADD HL,rr does not set zero flag. -
SkoolKit'ing errorsI'm in trouble with SkoolKit 7.2 Did so far [code]sna2ctl.py %GAME%.z80 > %GAME%.ctl[/code] control file looks fine [code] @ 16384 start …
... /> ; Routine at 18571
c18571 ADD HL,DE ;
18572 SBC A ... ;
18575 NOP ;
18576 ADD HL,DE ;
18577 ADC A ... -
BasinC can accept Intel 8086 assembler inside REM-linesIn the year 1983m the firmware "ACS SOFTWARE" develope basic-spectrum with REM+assembler Finally, here are two sample routines you might like to try…
... /> 30 REM ld hl,0
40 REM add hl,sp
50 ... a
70 REM sbc hl,de
80 REM push ... hl
90 REM pop bc< ... -
type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…
... /> ld (HL), 0
dec HL
inc (HL)
cp (HL)
jr ... /> ld H, 0
add HL, HL
add HL, HL
add HL, HL
ld A, H ...
add A, $3c
ld ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ld h, (hl) ; second byte of table
add d ; add on the ... l, a
add hl, hl
add hl, hl
add hl, hl ; HL = char * 8
add hl, de ; + FONTBASE ... e, a
add hl, de
ld a, (hl)
or a ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... for me ;o)
ld hl,tad_asc
ld de,#4000 ... /> ld (hl),e
inc hl
ld (hl),d
inc hl
ld a,e
add a,#20
ld e ...
ld a,d
add a,8
ld d ... -
PAW questionThis may not be the right place but anyways there it goes: I've been trying to figure out how to import graphic files in .SCR format in the PAW parse…
... it's 2
LD HL,49152-2048*screensize +256 ; point ... DE and add that to HL
multiply: ADD HL,DE ; add DE to HL
HL
LD BC,256*screensize ... -
ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... up
ld hl,04100h ; second pixel line address ... how much you'd add to move down one ... can't ADD HL,32, but you can ADD HL,DE), the ... difference
scroll rl (hl) ; incredibly useful - we can ... memory directly
dec hl
djnz scroll ; short ... -
undocumented Z80I am documenting a feature nobody has done before and no emulator gets right at this time. I'll have a report after doing some more tests. Fraser.
... . I have been using the ADD HL,DE instruction to set flag ... -
Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... in 16 bits using 'add hl,hl; ex de,hl; adc hl,hl', etc and calculated ... -
need help in codingI have an address in HL, which I must save in memory buffer (for example at address buff1) with shift (for example taken from memory address shft1). …
EX DE,HL
LD HL,addr1
LD B,0< ...
ADD HL,BC
LD (HL),E
INC HL
LD (HL),D ... -
need help in codingI have an address in HL, which I must save in memory buffer (for example at address buff1) with shift (for example taken from memory address shft1). …
... make such a thing:
HL->(addr1+buff1)
...
EX DE,HL
LD BC,ADDRESS1
LD HL,(BUFF1)
LD H,0
ADD HL,BC
LD (HL),E
INC ... than #FF otherwise INC HL
LD (HL),D
help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
... machine and in CHFLIP the ADD HL,BC could be replaced by ...ZX81 ScrollingI'm tempted to have a go at a bit of ZX81 programming, using MCODER II, though I could really use a fast multi-directional scrolling routine. Does a…
... with one byte
and add a LF in begin. (NOTE ... to lower 33 Bytes and add
32 Spaces and a ... />
[code]
LD HL,(VAR FOR ENDSCREEN)
LD ... C,L
ADD HL,DE
EX DE,HL
LDDR
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…
... add hl,hl '* 2
add hl,hl '* 4
add hl,bc '* 5
add hl,hl '* 10
add hl, ... bc '* 11
ld bc,prtab
add hl,bc 'HL ... in lower screen. (or add
LD A,2< ...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.…
... d,0
add hl,de
ld a,(hl)
... ; a = array index
; time = 36 cycles
add ... cycles
ld hl,MyArray
add a,l
... br /> noinc:
ld a,(hl)
; and ... ,MyArray/256
ld a,(hl)
T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... /> pop de
pop hl
exx
pop ... sp,0x4010
push hl
push de
exx
push hl
push de
... x16
ld hl,get1+2 ; high byte of ... br /> inc (hl)
add hl,de
inc (hl)
add hl,de
; ...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…
... de,0x1234
sample_pos_lo: ld hl,0x5678
ld ... /> add hl,bc
ld (sample_pos_lo+1),hl
ex de,hl ; now hl = ... necessary
ld (sample_pos_hi+1),hl
; possible 128k ... ...
ld a,(hl) ; fetch sample byte
...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…
... : LD BC,180
LD HL,10
ZAP3: LD DE ...
PUSH DE
PUSH HL
PUSH AF
CALL ... DE
POP BC
ADD HL,BC
;change frequency
Another Z80 processor questionOK, this time this isn't clearly covered in the FAQ, as far as I can see.... Suppose we have the CB instruction "SET b,r" (b=bit, r=register (differ…
... affected as follows:
ADD HL,xx: takes the value of ... HL before the addition
... internally ? Does it complement and add or simply subtract directly ?
Strange layout of Spectrum video memoryHello, does anyone have an idea why the Spectrum's video memory has such a strange layout? I understand that a resolution of 256x192 is an easy mean…
... DE,512
ADD HL,DE
EX DE,HL ; DE holds a ... printable char
LD HL,16384 ; or any other screenposition ... B,8
LOOP LD (HL),A
INC DE
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 …
... A,B
CALL #22B1 ; HL returns screenaddress
; A returns ... B,0
ADD HL,BC
LD A,(HL) ; get pixelpointer
HL ; get address
XOR (HL) ; reset pixel
LD (HL),A ...
