-
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…
... /> PUSH DE
PUSH HL
exx
push bc
push de
push ... /> PUSH DE
PUSH BC
EXX
PUSH HL
PUSH DE
PUSH ... /> PUSH HL
LD SP,(VALSP)
POP AF
POP HL ... -
can someone help with a rom routinei have been trying to draw a simple line with a the rom routine , but i just cant get it to work , so if anyone can give me an example in z80 that wo…
... /> [CODE]
DRAW EXX
PUSH HL ;you must preserve HL ... line from current coordinates
POP HL ;restore HL' for safe ... -
DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…
... 102(#66) and read instrustion PUSH AF
2) at adress ... your NMI code.
3) push registers to stack + your NMI ... NMI to 48rom you must pop all registers + jump to "map ... -
DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…
... the ZX ROM:
* Push a code onto the stack ... that you're returning.
* Push 0x0008 onto the stack (the ... routine at 0x0008 must now pop off the next entry and ... -
ZX games for fixingExist any games/software which need fix any bugs ? - incorrect graphics - incorrect or bad keyboard controll - too fast games (need slow-down) - game…
... slow due to having to push and pop bc before paging.
push iy, load iy,23610 rst#38 pop then return ... -
The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... 8255 (don't need any PUSH AF to stack)
LD ... 8255 (don't need any POP AF from stack)
RET ... -
Implementing goto on error condition...OK, so when I'm reading a file or directory on a network filesystem, when I reach EOF, it's not actually useful at all for ZX BASIC to stop the progr…
[QUOTE=roko;390053]1:
You probably destroyed IY=23610 or HL'=..... (10077 ?)
[/QUOTE]
I go for 10072 (tested with EXX, PUSH HL, EXX, POP BC, RET and the PRINT USR CALL) -
Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
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…
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…
... ld (mdaddr2+1),hl
push hl
ld de,00064h ... (pt3_delay+1),a
push hl
pop ix
add hl ... br /> djnz l1
pop hl
pop de
ld a ... push hl
push hl
push hl
push hl
push hl
push ...When would you use LD A,R ?Can anyone tell me a practical use of LD A,R and LD R,A I am confused when you would need to use it? Cheers
... ;****************************************
Interrupt:
push af
ld a ... (SpeedFlag),a
pop af
ei
reti ... change current beeper routine
pop hl
ld a,( ...Piracy (a good solution for both sides?)A week or two back, Micro-Mart wrote an interesting article about software piracy, although they didn't say anything new, as there's little if anythi…
... than what the big labels push at them, and indeed should ... us all listen to guitar-pop and R&B, they ...Spin Assembler DirectivesLeading on from [URL="http://www.worldofspectrum.org/forums/showpost.php?p=402514&postcount=65"]jp's recent post in Spin 0.7 Public Testing thread[/U…
... : 147),
(S: 'POP'; I: 72), (S: 'PUSH'; I: 73),
(S ...Spin Assembler DirectivesLeading on from [URL="http://www.worldofspectrum.org/forums/showpost.php?p=402514&postcount=65"]jp's recent post in Spin 0.7 Public Testing thread[/U…
... : 147),
(S: 'POP'; I: 72), (S: 'PUSH'; I: 73),
(S ...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…
... ld (mdaddr2+1),hl
push hl
ld de,00064h ... (p3x_delay+1),a
push hl
pop ix
add hl ... br /> djnz l1
pop hl
pop de
ld a ... push hl
push hl
push hl
push hl
push hl
push ...Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
...
[B][COLOR="Red"]PUSH HL[/COLOR][/B]
LD ...
[B][COLOR="Red"]POP HL[/COLOR][/B]
EXX ...Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... , it means that you can POP HL to pick the return ... address off, then POP all your other parameters, then ... up the last one and push back the return address.Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... , it means that you can POP HL to pick the return ... address off, then POP all your other parameters, then ... up the last one and push back the return address.[/QUOTE ...Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
^I like that, but I think if I were doing something similar, I would have just used POP HL and PUSH HL instead (which, admittedly, does mean you lose the value HL had on entry).Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…
... ;
main exx
push hl ; preserve return to basic ... ; fetch current error return
push hl ; and preserve
;< ... ),sp
; push hl ; preserve hook31
; pop bc ; and restore ... optempm
;
push ix
pop hl
add hl ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... push af
push bc
push de
push hl ...
XREF music_routine
call music_routine
pop ... hl
pop de
pop bc
pop af ... use to automatically push registers for you.< ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
...
push af
push bc
push de
push hl
pop hl
pop de
pop bc
pop af
What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
pop hl
ld a,(hl)
inc hl
push hl ...What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
pop hl
ld a,(hl)
inc hl
push hl ...What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
