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Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…
... faster to transfer the registers to the shadow registers rather than using ... -
Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... good (all opcodes, proper timings) Z80 emulation code in C with ... interested, I found a LGPL Z80 core, not perfect, but still ... -
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
This is a tool for Z80 coders who wish the Spectrum ... />
push af ; save the registers
ld a, 0x3b ; high ... br /> push af ; save all registers and the stack pointer
registers
pop iy
pop ... -
The most powerful 8-bit machine, and CPU?Further to the discussion in: [url]http://www.worldofspectrum.org/forums/newreply.php?do=newreply&p=621787[/url] What actually is the best 8-bit ma…
... this mean it has more registers, more comprehensive instructions, or what ... 6809E chip has over the Z80. Actually, why not? What is ... -
Z80 not-wroking with divIDEHi mates. I have two questions, maybe somebody could know. I realize some ZX Spectrums don't work with divIDE due to specific Z80 chips. 1) if …
... with divIDE due to specific Z80 chips.
1) if ... I change the Z80 - into another one - will my ... Spectrum with divIDE-non-compatible Z80, no version of divIDE at ... -
CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…
... -Shift random number generator for Z80[/URL], I became curious how ... -Multiply-With-Carry) RNG for Z80. These generators are based on ... /> To make it suitable for Z80, I have chosen base b ... tests. Here is the corresponding Z80 variant, which returns the 8 ... -
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... a natural feature of the Z80, or are they instigated via ... -
Known Z80 M1 problems?I got an email yesterday from someone asking for a Z80 without the M1 problem. I only know about the fanout problem that many Z80's are suffering of…
... from someone asking for a Z80 without the M1 problem.
Z80's are suffering off, causing ... ' a ZX Spectrum with a Z80 which has this M1 problem ... -
Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…
... with another useless project: new Z80 emulation core written in pure ... , i can't test FUSE z80 core, but i think that ... /> also, zymosis passes all FUSE z80 tests (i'll try to ... -
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…
... way to code this in Z80 assembler to work automatically, or ... -
z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…
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 ... way:
- If 128kB Z80 snapshot is loaded on ZX48 ... REALSPECTRUM emulator). Only if 128kB Z80 use 48lock on port 7FFD ... add next detection of snapshot registers state and use current ram ...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…
... read documentation for Z80 snapshot on WOS ... possibility insert ROM image to Z80 file.
... supported rom loading from Z80 file ? I test ... only ram pages from Z80 snapshot and ignore rom ... 't save Z80...).
Here is Z80 snapshot 128kB ...Replaced Z80 now a very dark screen!Today I dag out an old issue 3 that ive known for a long time has a faulty Z80 (M1 line) so I heat gunned it out, socketed it and replaced it with a …
... long time has a faulty Z80 (M1 line) so I heat ...Excel -> OpenOffice Z80 spreadsheet problemI tried transferring my [url=http://www.users.globalnet.co.uk/~jg27paw4/pourri/z80times.zip]Z80TIMES[/url] spreadsheet from Excel to OpenOffice the o…
... correct, as it looks up Z80 command timings from Einar's ...Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…
... ://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PSC-New-Sinclair-ZX81 ...Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... which current ones in the Z80 set would you replace?Adventure Skabet.z80Skabet.z80 (from Wos Archive) will not load.... Am I wrong ?
Skabet.z80 (from Wos Archive) will not load....
Am I wrong ?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 …
... of file process across a Z80 routine.
The emulator ... core has passed the Z80 Exerciser:
[url]http://mdfs ...New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…
... /misc/z80test-1.0.zip"]Z80 tester package[/URL] I have ...Configuration of FPGA coresHi all! Lately a lot of features have been added to the V6Z80p Spectrum core. Most of them are handled (clearly) using ports. Some examples: ULA+, Ti…
... ) will be available to the Z80; when the configuration
will ... 'll need to access multiple "registers" to configure various features
Loading .z80 filesHi, I have a +3 with MF3, but the tape player I bought doesn't output a loud enough signal to be heard by my Spectrum. Of late, I've been loading .…
... got a few games in .z80 format (these are snapshots, I ... , though hopefully I can run .z80 directly from my CF card ... something similar to "playtzx" for .z80? (I've been using playtzx ...Fastest Z80?Hi , Could somebody explain more about the Kawasaki Z80 33 MHz to me? Is it fully backwards binary compatible with older Z80s and could it be used a…
... explain more about the Kawasaki Z80 33 MHz to me? Is ... only find this:
Z80
? 8-bit microprocessor
Which type of Z80 cpu to use with ZX 48?Which type of Z80 cpu can I use with ZX 48? Only the 4 MHz cpu's or some with more MHz? Did not know if a 6 MHz cpu runs in a ZX 48 with 4 MHz. Mic…
Which type of Z80 cpu can I use with ZX 48? Only the 4 MHz cpu's or some with more MHz? Did not know if a 6 MHz cpu runs in a ZX 48 with 4 MHz.
MickyCompiling 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 (= …
... code translated by me to Z80 (there could well be many ... , I've not done much Z80 before at all so bear ...128K Toastrack - bad Z80?My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work. divIDE does not show the boot screen and in both if I push the N…
My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work.
divIDE does not show the boot screen and in both if I push the NMI button, the Spectrum resets.
Is a bad Z80 CPU?
My soldering skills are so bad. :(.Z80 File Format when exported by SpecEmuI'm trying to parse a .Z80 file generated by SpecEmu but am getting a few discrepancies from [url=http://www.worldofspectrum.org/faq/reference/z80for…
... 'm trying to parse a .Z80 file generated by SpecEmu but ...
