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Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... our machine code at free, fast-running (over 32768) and memorable ... /> ;return score to BASIC
Copy and paste the paragraph above ... br /> Insert line 26, then copy and paste the following code ... is slow down our blindingly fast machine code.
Insert ... -
Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... that bank switching is incredibly fast - just a simple OUT instruction ... pointer and use POP to copy bytes into registers, then page ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... the memory read cycle, with fast enough RAM you have plenty ... />
You'll need to buffer a byte somewhere (either for ... for the Z80. If we buffer the Z80's read in ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... ;659260]You'll need to buffer a byte somewhere (either for ... it's much easier to buffer the video bytes. The ULA ... , as I see it, with fast enough memory you can simply ... the original spectrum have had fast enough memory like that, they ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... 're going to have to buffer an extra byte to guarantee ... if fast RAM were available, a circuit with an 8 bit buffer ... with just one 8 bit buffer and a bunch of logic ... -
Spectrum Playbasic EMULATORHi, Im new to the site and im writting a spectrum emulator in Playbasic :-o Its halfway complete. But i need help with emulating sound!? Anyone care…
... interprets. It's very, very fast - an 8080 emulator (for Space ... easy - set up a looping buffer and write your samples out ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... junction.
So, putting a fast schottky diode, in series with ... on what voltage your input buffer (inside the ROM chip) needs ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... requires the clock will now buffer the /CLK signal before it ... with a slow rise but fast fall). -
Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... output signal (fireout) is a copy of the
// FIRE signal ... -
Stiff Cassette TapesI recently brought a copy of Pud Pud on ebay for 99p. The case, and cassette tape look to be in good condition except it wont play properly. I've tri…
... ;674076]I recently brought a copy of Pud Pud on ebay ... table edge.
2) Fast forwarding the tape on both ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... reverse without using a temporary buffer.[/quote]
ldi ; copy literal byte
... ;;;;;;;;;;;;;;;;;;;;;
; copy previous sequence
ex (sp ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... there's a single copy of the decompressor at ... level 1 to the buffer. When player advances to ... will need a single copy of the ZX7 decompressor at ... decompressed to the same buffer address (which would be ... ZX7 decompressor, and the buffer address. Then it will ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... :
[CODE]; from RCS buffer to screen (DE must contain ... /> ex de,hl
ldir ; copy attributes
ret
[/CODE ... works with any intermediate buffer (the buffer address doesn't have to ... -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
... through transistors, but a fast 3-state buffer. See: [url]http://www ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
So how do you use RCS in practice? It's quite simple:
[LIST]
[*]First transform a regular ZX-Spectrum screen file (such as "Cobra.scr") into the RCS format (producing "Cobra.scr.rcs") using the command-line utility RCS;
[*] ... -
Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …
... the zip), you need to copy everything, don't ask me ... you use the installer or copy all the files in the ... 's but you use the Fast Load in conjunction with the ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... for temporary buffer when depacking
[*]Simplicity
[*]Reasonably fast depacking
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... a temporary buffer of 64 bytes: for each column, copy all bytes ... as "r2r3p1p2p3r1" to this buffer, then copy them again to the screen ...RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... buffer (2048 bytes):
For each "third" of the screen, copy ... the screen content to this buffer using LDIR, then ... "standalone" routine[/URL] to copy back from buffer to screen while converting ... even need the other 0x100 buffer!RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... buffer (2048 bytes):
For each "third" of the screen, copy ... the screen content to this buffer using LDIR ... routine[/URL] to copy back from buffer to screen while converting ... decompressor+RCS inverted (without buffer). The only params ...Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…
... interfaces. Either a fast MCU or a CPLD buffer, acting as a ...Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…
... interfaces. Either a fast MCU or a CPLD buffer, acting as a ...Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... in ZX Spectrum is not fast disconnect, can in same time ... tri-state (3 state) output buffer in the ROM is not ...Windows 8 selling well...[Img]http://cultofmac.cultofmaccom.netdna-cdn.com/wp-content/uploads/2013/01/downgradetowindows7.jpg[/Img] When suppliers start selling downgrades y…
Actually, I've got a copy or two w8 pre-installed ( ... that it's twice as fast as x32... Even educated ones ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... some sort of 80K of fast storage device attached. In the ... low ram in the suited buffer. As my offscreen buffers and ...Newbie needs help ^^Hey Guys! I'm new here to the forums and I joined because of my growing interest in the ZX Spectrum computers. I'm from Germany and I was growing …
... and very fast method is DIVIDE and you can copy all your ...Spectranet updateHi all It's been a busy summer, and in any case I've wanted a little bit of a break from doing Speccy stuff to avoid it getting old (pun intended). …
Yes, you can buffer it. The wave form is ... a rise and fall time fast enough to cause significant ringing ... started to do is to buffer /CLK via a 74HCTxx (TTL ... you see with the similarly fast rising +3 /CLK signal.
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... , there's no hard and fast rule.[/QUOTE]
Agree ... could use the unused printer buffer as a sector map, just ...Now Games OneIs it just me but all three copies I have of this compilation are notoriously hard to load, specifically Strangeloop and Brian Bloodaxe but the rest …
Strangeloop on my copy was always very much hit and miss, even when the tape was brand new. The turbo loader on that one's ridiculously fast, I guess the tape they used was also ridiculously cheap. :)about Dan DareHi all, I not think this is for MIA forum but want to ask and I will be grateful if anyone help me with answer. I get from ebay dandare tape, origi…
... top FLASH LOAD an actual fast loader (similar to Strangeloop, which ... I'm sure my original copy of DD was a standard ...
