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I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…
... 512K machine with an 8MHz CPU and no memory protection? ... from its innermost core, with cheap and easy support ... 3000/4000 to start with, plus the Video ... push a machine of dubious bit-ness. Even Sinclair did it with ... further to the extreme with the Spectrum and ... -
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…
... load also SCR files with length 6144(screen without ... that are useful in connection with the "standard" Spectrum software ... modules, using the full available memory - and at that point, ... disk first, then fill the entire top page with something distinctive ( ... -
Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …
... not doing anything directly on memory: the T4 cycle of the ... : when it tries to refresh memory.
Every instruction has ... over the bus and fill its internal buffer with video data so ... could be used to refresh memory as well (as the Sinclair ... -
RAM PagingCan anyone shed some light as to how RAM paging actually works, at a hardware level (so not POKE xxxxx stuff). I know about CE and OE lines on DRAMs …
... .
Apart from controlling 64K memory addresses the Z80 can also ... /O ports. The (only!) difference with memory is that the /IOREQ line ... an electronic switch (often built with a so called 'latch' chip ... /CE and /OE signals for memory are created in a similar ... -
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…
... e. instead of being stuck with 48k, 128k, etc., ... Could? Yes. But probably not with the exisitng hardware; I only ... able to push data it reads into memory or make ... stream real time data with little cpu. The fact ... the cpu. A device with its own ram (and ... -
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…
... crashes were due to this memory allocation copied an pasted ... are done with a sprite you can release this memory for ... the main memory area.
Also to add with the music ... br />
push af
push bc
push de
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…
... ,a ;load bc with a
push af ;push a out of way ... /> Not faster, but shorter in memory. Can therefore be used in ...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…
... like ld iy, hl (does push hl, pop iy), is that ... />
2) What's with the memory window in the Spin debugger ...The Chuntey InitiativeIt's the start of a new year and with it brings a new wave of optimism and hope! :) In light of the relative success of twitter/speccynews (in the s…
... I'll be following this with interest. I think I ...
However, it definitely does fill a significant gap in the ... as a place to push out information and ideas ... be updated in tandem with the Twitter thingy?[/QUOTE]< ... were to come up with a script that tracked ...Fastest fill m.c. routine ever?What is the fastest fill routine you've ever seen? Is there a listing somewhere? Most games and adventures that use fill routines were considered slo…
... the fill is done byte at a time its memory requirement ... flood routines in some games with your own?[/QUOTE]
< ... much on improving old software. With the new standard on spectrum ... mass storage emerging, along with internet peripherals and a new ...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…
... of 256 UDG characters in memory. It's up to you ... the attributes to be associated with the UDGs or have a ... shift the data around and fill in the edges.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…
... br /> ;Fills the two tables with pointers.
FillScrLines:
ld ... FillScrLinesLoop
;now fill the table in reverse
inc hl
push de
djnz FillScrLinesRev
OptimisationI've participated in several thread hijacks about this, so perhaps I should open a new thread. Et VIOLA! Here it is! Knuth, who was earlier reporte…
... of the Windows virtual memory manager which can leave ... whether it remains true with Vista/Server 2008 and ... memory pages it looks at as candidates to push ... to reference frequently used memory pages. Being an on ... this may have changed with Vista/Windows 7/Server ...OptimisationI've participated in several thread hijacks about this, so perhaps I should open a new thread. Et VIOLA! Here it is! Knuth, who was earlier reporte…
... of the Windows virtual memory manager which can leave ... whether it remains true with Vista/Server 2008 and ... memory pages it looks at as candidates to push ... to reference frequently used memory pages. Being an on ... this may have changed with Vista/Windows 7/Server ...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 …
... to encode
; de = memory address to write encoded symbol ... tree leaf for symbol
push hl
exx
memory byte
ld c,$80 ; start with first ... cp h
.foundchild
push af ; save: nz = right ...ZX Demos and the wow factorI remember reading a few comments in the past 3 years regarding demos. Some comments included how boring it was to see this or that effect again, how…
... even try to come up with quality material, etc". < ... because we love contact with Sinclair machines. And ... interlace works well only with colors of similar brightness ... be used as virtual memory. Things that couldn't ... can now be done. Fill routines can be faster. ...ZX Demos and the wow factorI remember reading a few comments in the past 3 years regarding demos. Some comments included how boring it was to see this or that effect again, how…
... even try to come up with quality material, etc.
... . you can compare it with crap game compo or minigame ... can't come up with anything else because the ... can be used as virtual memory. Things that couldn't ... ram can now be done. Fill routines can be faster. ...Urgent!!!! Need help with saveHi guys, This is URGANT! I am making a turning moment program that uses many arrays. Each array is of size 500 and there are about 6 of them. The c…
... going wrong at all. To fill you in on the relevant ... the current variable state along with your program;
- six arrays ... the Basic editor when the memory is so full that there ... (and if you were working with 15000 bytes worth of arrays ...Machine Code for BeginnersHi folks. [sort of] newbie alert. Not new to Spectrum - been there since getting first rubber key 48k in 84 and a regular visitor to WoS for many y…
... organised, easy to get started with, covers all the basics in ... to move a block of memory data, for example), dissecting other ... 'tasted' what you can do with Z80 machine code, The Complete ... good & fast way to fill in the gaps. And then ...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…
... use
push hl
pop de< ... 16-bit value from memory into BC using something ... versions having to do with C interface issues). ... /> The entrypoint is 'asmentry' with register set up indicated. The ... sprite as individual characters with calls to dfloc ...Well, it's just sat on my hd doing nothing otherwise..Here's a platform game I was working on late last year. I spent something like two months of not very plentiful spare time on it. So I worked during …
... levels, one with nine screens and one with six. The ... six or seven worlds with around 30 screens each. ... fit all of this into memory. Levels, gfx and ... are decompressed into main memory only when they are ... at? Things that will push me into new areas, ...Coliseum reviewHi everyone! You can check my Coliseum review here: [url]http://spectrumparadise.blogspot.com/2010/04/coliseum.html[/url] [url]http://spectrumpara…
... are attacked by a guy with a poor one. You can ... kill him) and try to push him against something. It only ... it possible to kill guys with superior weapons in later levels ... the trident can sort of fill everything else, net and lance ...+3 how to detect if a file exist ?Need help. I am making a generic menu to my compilations over the spectrum +3. Exist some way programatically to detect if some file exists on the d…
... middle 32K
;When messing with memory pages from a program
with the address of the paging ... , return value = 1
48941 PUSH BC ;store return value
with the address of the paging ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... routines can be safely called with RANDOMIZE USR. i'll take ... -for-food".
btw. "fill routine" -- is it the routine ... be REALLY fast without much memory wasting, but that's definetely ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... routines can be safely called with RANDOMIZE USR. i'll take ... -for-food".
btw. "fill routine" -- is it the routine ... be REALLY fast without much memory wasting, but that's definetely ...Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... any EEPROM or flash memory "pin compatible" with the 27C256? (..) Also ... EEPROM or flash compatible with my older Spectrum +?[/QUOTE ... One 256kx8 EPROM with a 4 bit counter, with a "reset" ... Contact_bounce"]contact bounce[/URL]" (push/release once, and your ...'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... API at all.
Fill memory routine I've provided is ... of the memory to another, provided in HL and DE, with length ... filling block of specified length with the same value.How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... /> [/QUOTE]
You can push your parameters onto the calculator ... are already in registers or memory, then there isn't much ... /> EXX ; switches BC,DE,HL with their alternates
EXX AF ... ,AF ; switches AF with their alternates
[/CODE]'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
I'll start with your original question, about "Hello ... a text string to screen memory.
; The string to be ... all.
next_scanline:
push bc ; Free up a register ... ".
; We can get away with doing this, because no single ...
