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Fastest way to delete a folder?Sometimes ccleaner is enough on some computers I work on, sometimes shift+delete while using Windows or Ubuntu is enough, sometimes rd folder /s /q (…
I don't see how an instant delete could be possible, ... update a change log for every action, all of which is ... time. At 14 hours wouldn't it be quicker to do ... you want but I don't know if it would be ... -
Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…
... ]What are M Cycles and T states?
Looking through ... or write operation takes 3 T cycles and simple peripheral ... operation takes 4 T cycles (actually extra T cycles could be ... Spectrum). Moreover, since Z80 is an 8 bit microprocessor, takes more ... -
Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…
... (in bytes) and time (in T-states) for all instructions (although I ... don't recall anymore as many opcodes ... to know exactly how many T-states the code will take, so ... the raster beam position at every step for correct synchronization. For ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... and Z80)
[*]583 / 1166 T state modulation, 3000baud (timing equivalent ... low periods, you wait for an edge, then wait 0.75 ... around 1.5 million free T states per second. Almost enough to ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... a delay loop that runs every bit with one that does ... 've only got about 300 T-states to do it, and thats ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... only got about 300 T-states to do it, and ... the main loader doesn't need them for anything; ... come into play when writing into the video RAM? ... if timings weren't already tricky enough when writing loaders!
... . The games themselves wouldn't be hacked at all, ... -
Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... ]
Don't worry, I've been writing other bits of ... to the flip routine for an idea to use in another ... -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... and it could generate an irregular background that wouldn't look good anyway ... if the programmer "paints" an appropriate area first with the ... since programmers have to prepare an appropriate area in advance ... of a letter to produce an accentuated letter, or print ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ROM style encoding. 583/1166 T states.
[QUOTE=stephenw32768;724130 ... on Github, but I don't think you've checked that ... weekend. It won't be as fancy an experience as Versaload because ... I won't have time ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... tested them on ZXMAK 2 emulator and all work flawlessly, without ... that would leave you fewer T-states in which to do tricks ... -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... /> ld a, 198 ; within 3000 t-states
cp b ; count edge ...
call ld_edge_1 ; consider every edge
jr nc, ld_break ... /> ld a, 203 ; 2400 t-states
cp b ; carry flag ... br /> ld a, 22 ; 358 t-states
org 0x05e9< ... -
Completely free games?Hi, I would like to know if there are any open source or completely free games for ZX Spectrum. Or at least some other free programs without any lin…
... sense to credit someone every time I used this ... little tricks we all use every day.
... For instance, I didn't invent the 18 columns multicolor ... I didn't invent the idea of writing outside the ... screen so, although I didn't ... -
Completely free games?Hi, I would like to know if there are any open source or completely free games for ZX Spectrum. Or at least some other free programs without any lin…
... sense to credit someone every time I used this ... little tricks we all use every day.
... For instance, I didn't invent the 18 columns multicolor ... I didn't invent the idea of writing outside the ... screen so, although I didn't ... -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
Since I wasn't about on WoSf when ... was released it didn't get much in the ... can be used to provide an additional 128 UDGs.
... br /> [*]Cursor jumps to an error in the line.
[*]Invalid lines generate an error sound.
[*]INVERSE support ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... dec b ; reduce by 13 t-states
jp p, sa_leader ; ... /> dec b ; reclaim 13 t-states
inc a ; MIC ... ld a, 198 ; within 3000 t-states
cp b ; count ... br /> call ld_edge_1 ; consider every edge
jr nc, ... -
Saving GamesSorry if this is an obvious question but I'm not much of a techie but is there any way to save games? dying to play some of the old footie manager g…
... must be using an on-line emulator as I haven't downloaded anything ... the screen but this doesn't seem to do anything. I ... lunch break honest) and can't download stuff. I take it ... of saving games without downloading an emulator? -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... />
Using vector fonts on an 8-bit machine with limited ... power is insane. There isn't even enough room in RAM ... . Of course, don't let me stop you writing a PostScript driver ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... AY programming, so I can't comment with any authority; but ... of the loader with an equivalent number of T-states' worth of OUT ... -
Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …
... QUOTE=memrah;733821]But wasn't the 2068 ULA very compatible ... video signal that doesn't work on a lot ... no reason you couldn't make an SCLD (the 2068's ... different, both in the t-states before the screen blank and ... US).[quote]I don't think software could tell ... -
bitmap address to attribute addressI've searched, but I don't seem to find the proper keywords. I have a bitmap screen address in DL, character aligned (the address of the top byte of…
... happens. But if you don't have A' tied up you ... can always do an EX AF, AF', which has ... operation. It works, but its an ugly piece of code, I ... operations. Its just those 8 t-states they eat up, maybe a ... -
bitmap address to attribute addressI've searched, but I don't seem to find the proper keywords. I have a bitmap screen address in DL, character aligned (the address of the top byte of…
... operation. It works, but its an ugly piece of code, I ... operations. Its just those 8 t-states they eat up, maybe a ... -
idea: new gaming interface for ZX Spectrum (48k)First of all, I am not an expert this is just an idea of what I would like to see happening in the modern era of the ZX Spectrum. A compact, small, …
... 736993]Might as well use an Arduino Nano. The source ... that, I'm not exactly an AVR asm expert).
... bus) is 2.5 Z80 T-states. The Arduino Nano running ... will therefore have 11 AVR T-states to respond to the ... 'll take 7 AVR T-states to begin executing your ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... enemies there that don't respawn) are an excellent place for farming ... off and doesn't return. I wouldn't waste any time ... The skeletons down there don't die unless you defeat them ... Game + I strongly recommend upgrading every single bonfire to full otherwise ... -
Spectrum CP/MHello.. Just out of curiosity, has anyone actually used +3 CP/M for any practical purpose? I remember booting it up a couple of times years ago, jus…
... =guesser;737085]Why can't they both be an ASIC?[/QUOTE]
t call it an ASIC here :D) ... my right, it will generate heat and you can draw ... manufacturer gives you stuff in an array. You determine what ... you end up with an FPGA that cannot be ... -
bit manipulation conundrumWhat's a neat way to change this bit pattern in registers BCDE: [code]Loop0: ;change B:00000000 C:abcdefgh D:ijklmnop E:qrstuvwx[/code] to this bit …
... bytes, run time about 400 t-states. Of course, I would love ... very quick) and then doing an octal-decimal conversion. It took ... -
Downloading code to physical hardwareHi folks, Back in the day, my devkit was a TRS-80 and I had a simple connector device from the TRS-80 parallel (printer) port to the expansion bus o…
... bis.
Its not an internal board as I believe ... reset.
Develop on an emulator, save to the PC as ... .
This isn't meant as an advert for for the ... -
Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…
... somewhat slower (if it's an unconditional jump, or if ... take 10 T-states, whereas a JR (unconditional) takes 12 T-states, and ... 7 (if condition is false) T-states.
This can ... HL) [4 T-states], JP (IX), JP (IY) [8 T-states] and finally DJNZ ... -
Seeing the code/In emulatorHello, Here is my Noob question. Is it possible to see the code for these games in an emulator? To be able to study the code? I am using the Sp…
... ;741286]Really? I didn't see anything in there that ... isn't already in most Spectrum emulators ... in the process memory of an emulator seems uber-flaky (although C64 ... , can't really understand why)[/QUOTE]
Which emulator? That ... -
IF1bis vs SpectranetSince I will shortly have access to both an IF1bis (which I've bought) and a Spectranet (thanks to a loan from cmonkey), I will be in a position to g…
... you can reduce this to an absolute minimum by allocating a ... coding you don't need all that many T-states to do it ...
