-
Buggy/Rover magazine articleI had no sensible idea which forum seemed best to post this, so figured 'Misc' would be the best choice. There was in Sinclair User (unless memory…
... User (unless memory deceives me, possibly Your Spectrum at a push) a ... -
The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... the code to the contended memory (as was suggested by someone ... /> ret
int_routine
push af
ld a,%01001000 ... -
Prportional Ascii text scrollerA couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere y…
... you point it to in memory, with the possibility to auto ... ,(hl) ;counter into C
push hl ;save HL
print ... -
[Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…
... /3503
; Clear attributes memory.
ld a,FLASH_OFF | BRIGHT_ON ... byte.
; Clear screen memory.
ld a,%00000000 ; Select ... stack pointer and using push/pop to copy memory fully unrolled with ... -
Printing text using direct screen addressingHaving some problems printing using the FASE engine which is currently defeating me. Hoping to have someone clear out the bit of fog currently dwell…
... 't assume that the video memory is on 0x4000. You must ... -
converting sna to tapsince i'm struggling to find a simple sna to tap converter that works fine on gnu/linux, i'm about starting to code one on my own (using a scripting …
... ' stuff might be removed for memory optimization)
10 cls:clear ... "F" register (perhaps only using push and pop?) )
$00 I ... -
Apollo space craft memory coresI just watched an MIT science report about how the computer equipment for the Apollo space craft were built and tested. https://www.youtube.com/watc…
... with wire acts as a memory store. Is it possible that ... -
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…
... also saves 768 bytes of memory.
Anyway ...
MACRO LD_SCROLL_SRC_DEST
push bc
ld a, (bc ... /> MACRO LD_SCROLL_SRC_DEST_LINE offset
push bc
ld a, (bc ... /> .nextbyte
push bc
push hl
ld l ... -
ZXSpin "Out of Memory" errorI've used the Debugger in ZXSpin for years but recently it's developed a fault. When I select the Debugger from the Tools menu ZXSpin goes into "Not …
... 5 minutes an "Out of Memory" [OK] message appears after which ... -
Name this game!Okay, details are sketchy at the best: 2-d scroller, blocky graphics. U have to go around shooting pipes (actually certain gates in the pipe) so tha…
... bit like pipes, at a push, but there's nothing resembling ... if anything there jogs your memory. -
Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …
... sure how fast you can push the Spectrum) it would take ... transfer the 7k of screen memory the spectrum uses. The only ... sending data to the screen memory and instead be forced to ... -
Looking for two games (forgot names?)....1. A game where you bounce around as a little ball. It was like a 2d platform game. You have to collect fruit or something. Later on the platforms di…
... but essentially it didn't push the envelope as much as ... 3mhz and dealing with contended memory slowing things down.
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... I had Out Of memory messages after the program had ... where it stays.
PUSH HL ; Store HL in ... bit.
PUSH HL ; Store location of first ... reset bit of sequence.
PUSH DE
EXX ; Retrieve ... 0 of byte.
PUSH AF ; Save carry 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…
... at a different location in memory.
[quote]
Also ... can then load directly into memory with most emulators. Once in ... the emulator's memory, you can create a tap ... Smith pages, I implemented a "push-many-timer" scroller, great fun ...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…
... sprite. This is _wasteful_ of memory... did anyone use this???
memory that you have available. At ... . There's no 'push l', only a 'push hl'. You should also ...Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... of a background screen in memory (at #8000), and we need ... 've tried LDI and POP-PUSH, but Im not quite sure ...Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... (memory),sp
new_space: ld sp, 0
push af
push ... de
memory: ld sp, 0 ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
Here's the Lenslok proggy I chose...
It's TT RACER but I'd imagine the following could be applied to all Lenslok games...
=====================
TT RACER AND LENSLOK
=====================
Ok, So the ...Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... the first 256 bytes of memory. This is not used in ... /> .my_isr
push af
push bc
push de
push hl
memory as I can't find ...anybody to help meHow I can see the .scr files in the RealSpectrum emulator?
1) Push ALT and F9 together.
2) Select "Load memory block" from the menu.
3) Select your .SCR file from the list.
4) Enjoy :)whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…
... /> push de
push bc
push af
exx
push hl
push ... de
push ... using this routine, not counting memory contention during the pushes.
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. …
That PUSH/POP routine is how I ... that aren't possible with PUSH/POP, so if there is ... yet...
Regarding the memory limitations - this is the point ...InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... obtained from a peripheral, not memory so the 5-cycle opcode ... 3/3 T states to push PC.
The int ...need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
...
DRAWSPR DI
PUSH IY ;Preserve IY for return ... ; source of sprite in memory (sprite is stored in ... 3
LOOP1 PUSH BC
LD ... 8
LOOP2 PUSH BC
LD ... br />
SHIFTLOOP1 PUSH BC
LD C,8 ...Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …
... : the data from the video memory
(16384-23296) is ... right border) ULA try read memory page (16384-32767}. if CPU ... (that means write to memory, read memory or just execute instruction on ... above 32768 (call,push,pop,ret acces memory on SP pointer}, speed ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... />
PUSH AF
PUSH BC
PUSH HL
PUSH IX
DoBlankAttr:
PUSH HL
CALL ScreenToAttr
memory to FB0Ah
LD ...
