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XYZ - a multithreaded GUI operating system for SpeccyToday I'm re-starting my unfinished project. A few years ago I wrote the yx multitasking kernel (which includes RAM/ROM versions, threads, memory man…
... on the JITer experiment. Z80 to Z80 JIT means you hook all ... blocks First block is
[code]LD HL,16384
... [/code]
And second block is
[code ... example: dynamically relocate call or page memory) and then replace the ... -
Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
This Z80 lark isnt easy, in fact ... my own.
Secondly, 16384 to 23296 is the graphics ... -
Z80 opcode breakdownAnyone knows if there's a document on the net covering all the Z80 instruction breakdown by machine cycles? All I could find was that one on the Z80…
... the net covering all the Z80 instruction breakdown by machine cycles ... was that one on the Z80 support page and the CSS Faq ... -
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If you're interested in Z80 coders compo, visit my page [url="http://mbr.nm.ru/compo.html"]http://mbr.nm.ru/compo.html[/url] -
TASM, Z80 and Spec emusHi! Having some novice questions here regarding TASM and writing machine code for the Speccy emus... Now I have configured TASM into my EditPlus and…
... />
; Testfil
LD HL,16384
LD (HL),255
Z80 asm syntax? The demo z80 file with tasm ... separate binary files? Any good Z80 guides on the net specific ... -
Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…
... z80 core is almost finished (apart from RRD, RLD, and block instructions ... debugging work, is there a Z80 program that can tell me ... -
Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... .peargames.co.uk/downloads/bb10.z80"]http://www.peargames.co.uk ... /downloads/bb10.z80[/url]
and the ... DEFW .WORD
#DEFINE DEFS .BLOCK
#DEFINE EQU .EQU
finding largest value (z80 assembly)suppose we have to write z80 program which requires to find the biggest value in a block of memory starts from the address 101h until address stored …
... z80 program which requires to find the biggest value in a block ... 100h
( the length of block stored in 100h),then put ...Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
I'm quite new to z80 programming, but i'm attempting ... stuff at the start of Page 5 (at 8000h). I ... this for graphics instead of page 2 due to the memory ... which requires me to manually page in ROM 3 and RAM ... used for the stack from page 5. Does this not corrupt ...My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... want to polish my little z80 asm coding habits if you ... />
[CODE]
SCREEN equ 16384
ATTRIBUTES equ 22528
block of 256 bytse (first char ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... program enters this "move sprite" block?
I used a ... .se/zx/move-sprite-1.z80"]here[/URL].
I ... ]loadgraphic[/B]
ld hl,16384 ;screen address
ld de ... to right
ld hl,16384 ;screen address to start at ...Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…
... list of Z80 commands in the dictionary section.
Page 102 ...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 …
... the +2A/+3 halts the Z80 using WAIT?
All ... that the ULA halts the Z80 by forcing CLK high. I ... an infinite loop program (ORG 16384; DI; JP 16385) loaded at ... to put a Z804020 CPU (Z80 capable of 20MHz clock), isolate ...Project OTLA / k7zx (high speed loading)Hello, I am proud fan of zx spectrum (I do not have speccy, but clones (Didaktik Gama, Didaktik M)), I am using portable CD player to load games. Al…
... added an issue to his page, maybe he will notice it ... to implement ?
Otla project page:
[url]http://code.google ... $ space (16384) and continue to speedload
of splitted block from 60000 ... /> loading speed to load last block.Documentation page: a link needs updatingAt the bottom of the page [url]http://www.worldofspectrum.org/documentation.html[/url] the link to [quote]Z80 CPU Official Support Page, maintained b…
At the bottom of the page [url]http://www.worldofspectrum. ... link to [quote]Z80 CPU Official Support Page, maintained by Thomas ... ]http://z80.info/[/url]
Also, the page [url= ... following links from the documentation page,
you first need ...Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…
... that blowing up the faint page made it possible to read ... loaders expect 80 bytes per block - there are 82.
+ The ...Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…
... *"m";1;"rom" CODE 0,16384 : LOAD *"m";1;"rom ... ROMCS line doesn't page off just a portion ... call anywhere in the Z80 address space, with the ... de,32768
ld bc,16384
ldir
jp ...SnapToTap R2.3I've added z80 file support and raw binary exporting options to snaptotap. it's still 48k only though. [url]http://arda.kisafilm.org/fish/SnaptoTap…
I've added z80 file support and raw ... is not your regular sna/z80 to tap tool. Converted ... single part, standard code block and it can be stored ... loader to load a snapshot block into zx spectrum *and* ... custom loaders, as basic cannot page 128k ram. If you got ...Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…
... solid 8x8 block).
[CODE]
ld hl,16384
ld ... start of a 256 byte page.
So, how do ... routine, that draws the same block as in the first example ...redirecting Z80 sub-routine CALLsI'm working on changing a TR-DOS disk program to work from standard +128k tape and thought that rather than painstakingly working through the code ma…
... being read, and the destination page & address, from which info ... way to code this in Z80 assembler to work automatically, or ...128kB snapshot on ZX48kBWhat is best way for 128kB snapshot loading on 48kB models ? Some Z80 snapshots are 128kB versions (Z80 v2 or v3) but contain 48kB games. Same proble…
... models ?
Some Z80 snapshots are 128kB versions (Z80 v2 or v3 ... 128kB Z80 snapshot is loaded on ZX48 then load ram 16384-32767 ... and from 49152 load always ram page 0 ... (inspired by REALSPECTRUM emulator). Only if 128kB Z80 use ...Z80 snapshot formatI read documentation for Z80 snapshot on WOS and see in table possibility insert ROM image to Z80 file. Here is full table: [code]The pages are numb…
... possibility insert ROM image to Z80 file.
... 7fff
9 - page 6 -
10 - page 7 -
11 ... 't save Z80...).
Here is Z80 snapshot 128kB with ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... the multiplexer outputs from the Z80 side are higher. Hope that ... enough fast block RAM to implement an extra memory page (if needed ...ZX Spin 0.666 FailsSeems to be broken. Whenever I try to open any file in any way, I get the same error - doubleclick the file, open a file via menu, even "insert a ta…
... "This .z80 file contains a block that decompresses to greater than 16384 bytes ...Ticks, the first command line Z80 emulatorThe project page is in Spanish: [url]http://retrolandia.net/foro/showthread.php?tid=43[/url] So I will expain a little. Ticks is an emulator that …
The project page is in Spanish:
[ ... of file process across a Z80 routine.
The emulator ... core has passed the Z80 Exerciser:
[url]http://mdfs ...Problem with Page 7I've been experimenting with running code in page 7 (+3) from BASIC and I seemed to have got it sorted out but then it all went wrong. Firstly, I tr…
... experimenting with running code in page 7 (+3) from BASIC ... LD BC,$ffff : RET" in page 7
So ... "t:": LOAD "LoadCODE"CODE 16384: POKE 23388,16+7: OUT ... 139: POKE 65368+a,PEEK (16384+a): NEXT a:
... "LoadCODE" were now in page 7 starting at 65368 (ie ...Compiling Lisp to Z80.I am doing some thought experiments on this. Here is an example of a Lisp program. It adds two numbers together. [code] (define (add x y) (if (= …
... translated by me to Z80 (there could well be ... 've not done much Z80 before at all so ...
This is the else block. It decrements a and increments ... br /> This is the then block. It pushes b, which is ... beginning of the else block. This saves two instructions ...
