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Russian Translations...As i have once again been reminded (by the "Homebrew games" thread), there are some funky looking Russian games that I can't play due to not understa…
... that address to move my code if the area proves ... br /> [code]
; A routine to draw bitmaps of 6-pixel ...
; Save the "Outer loop" Counter
PUSH BC
; Restore Outer Counter
POP BC
DJNZ print_6x6_outer
Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... to stack the result and ensure the value can be returned to ... PUSH BC
RST calbas
DEFW 7833 ;Int. to BC
POP ... jumpo DEFW = jump to the DEFW in 48K Spectrum ... do remember however that the 'RAMTOP' function only ...+3 Centronics port: How does it work?I've been trying to follow the code with Fuse's debugger and I can't see it writing anywhere except to port 0x1ffd. It also jumps through some fairly…
... /> 2207 f5 push af ;save the value we want to output
;Output byte to the printer latch.
2223 f1 pop af
2224 ...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…
... , if I wanted to display text on the screen as part of ... can I use the Spectrum ROM functions to do the display (RST 16 ... NMI code.
3) push registers to stack + your NMI code
to 48rom you must pop all registers + jump to "map-off ...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…
... allows you to call the ZX ROM, but will return to the DivIDE ROM ... does this to call out to the ZX ROM:
* Push a code ... onto the stack ... must now pop off the next entry and examine it, to see whether ...+3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…
... RAM for the stack with the first CALL or PUSH/POP, and a ... infinite loop. (Incidentally, the stripes on screen aren't ... (that doesn't use the stack) to find this out though. ... is being reached before the program counter loops back. ... trace/solder joint to memory).Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…
... - greets DG and McLoed - the +3e image is coming good ... to add to it - been converting all the best games from TRD - love the ... stuff with drawing screens using push/pop but when they leave interrupts ... gets messy to fix - I read in the software section the other ...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…
... probably wants to move the stack out of the way of the AY data ... to the im2 interrupt routine
; save registers used here
push ... regsiters
pop hl
pop bc
pop af
SP and IM2 woesI have a function that writes the backbuffer to the screen using the method by which SP is stored, I "POP" a load of registers and then chnge SP to t…
... just can't avoid the corruption if the interrupts are enabled, ... because even if you don't push & pop ... any register, the stack will always be used to store the ... a break in the middle of the big copy routine and ...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…
... means you can use EXX to use the alternate BC', DE' ... data over from one set to the other. Or you can ... use AF' to save the flag state and restore ... (if you can't just PUSH/POP). Or you can swap AF ... , there are no alternates to the IX and IY registers.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…
... I'm used to memory management to be transparent to the programmer and I ...
push af
push bc
push de
push hl
XREF music_routine
call music_routine
pop ...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
; code to ...
pop hl
pop de
pop bc
pop af
The z80 will respond to the interrupt with the sp1 bank present ...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…
... br /> ;Prints numbers 1-20 to the screen
xor ... with a
push af ;push a out of way ... rst 10h ;print Return
pop af ;get back a
pop hl
ld a,(hl)
inc hl
push ... A'ing it to check the status of the zero flag, ...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…
... ]
;Prints numbers 1-20 to the screen
xor a ... 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…
... ]
;Prints numbers 1-20 to the screen
xor a ... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
to the mindset of bitty, flippy minimalist ...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…
... significant portion of the information that's meaningful to the programmer is ... in computer programming between to 80s and the noughties.. I mean [ ... or whatever...
So, the go-faster code now looks ... pop hl
ld a,(hl)
inc hl
push ...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…
... ]
;Prints numbers 1-20 to the screen
xor a ... bc with a
push af ;push a out of way for ... /> rst 10h ;print Return
pop af ;get back a
Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …
... you send me at the end of the day colour or otherwise ... ... As for "do you use PUSH BC/POP BC corectly?"... er... probably ... code from 2005 to spit out a map on to the screen though ... that I could use to bring the maps to life on a spectrum ...Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
... /> push hl
call keys ;
pop hl ; Retrieve the register values
pop ...
ret ; enabled and return to the
; interrupted routine.
[/code ...Character scrollingOk, first I'd like to say that I'm not looking for a complete routine (but that might help) because I am hoping to write it myself and learn a bit mo…
... modifying code, doesn't use PUSH/POP copy, uses LDIR, uses pre ... screen address HL to move eight pixels down on the display.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;Fills the two tables with pointers.
Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
Congratulations, you saved a micro-jiffy!
I'll put that in tomorrow when I'm more sober ;)
If you can optimise the inner loop to remove the push / pop of hl that would be better ;)Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
... you can optimise the inner loop to remove the push / pop of hl that would ... />
You seem to be more than able to do that yourself ... top notch! All you need to do now is twist it ...Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
... can optimise the inner loop to remove the push / pop of hl ... xor #e0 ; #a000 maps to #4000 now
ld ... is ideal for using the stack pointer. Second attempt ... and destination address
pop hl
ld e, ... states off from the loop for the cost of setting ...shifting spriteshi. have anyone experience with shifting sprites by table ? some neat tricks ? i don't want to see complete code (really don't want, it trashes thr…
... to or the data together, but that was before I heard about the push/pop ... "copy 2 bytes at once" trick with modifying the stack ... pointer, so that was probably not the best ...Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …
... symbol
push hl
exx
pop hl ; hl ... br /> .writeloop
pop af
ld a,c ... h
.foundchild
push af ; save: nz = right ...
jp encode ; on to the next encoded bit
[/code ...tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …
... is a similar trick to the one used previously, but ... a different purpose - get the current PC, without relying ... work, it'll leave the address of "hlhere" in ... often doing a PUSH HL / POP IX combo, to give me a ... USR statement, BC contains the address called, and this ...New member here. And a spider! :)Hello everyone. My name is Sekrets. I'm quite a lonely individual, searching for a digital home where I might find fellow speccy enthusiasts to adopt…
...
push hl
pop de
to load the value of ... all about moving the bits around to the format indicated in the WOS link ... :-) In fact, moving one char to the right can be done with ... adding one to the screen address (eg INC HL ...Midi2ayhello, Does anyone know how to use MIDI2AY ? FABIEN
... to the im2 interrupt routine
; save registers used here
push ... saved regsiters
pop hl
pop bc
pop af
jp ... 56 ; we'll allow basic to ...Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …
... need to disable interrupts, as the 128K ROM0 makes a call to the interrupt ... New"]ORG 40000
PUSH AF
PUSH BC
LD A ... ; back to 48K rom (rom 1)
POP BC
POP AF
RET[/FONT]
This routine should store the ...Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…
... accessed via push/pops.
pop hl
push hl ; ... />
pop bc
pop hl
push hl
push bc ; hl ... cleaning up the stack) the compiler / coder may not have to push values ... is something best left to the programmer's discretion.
