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Symbos-z80 on a speccy?[url]http://www.uelectronics.info/symbos-z80[/url] If it works with the CPC and MSX, surely the Speccy qualifies too?
[url]http://www.uelectronics.info/symbos-z80[/url]
If it works with the CPC and MSX, surely the Speccy qualifies too? -
Extended memory and SNApshots in emulatorsExist any snapshot fileformat that support extended memory for ZX (clones) ? I see only Z80 fileformat with 48/128 and 256kB(ZS Scorpion 256) support…
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ZX Emulator "Z80 STEALTH" support save extra memory ... in Z80 files (contain added new ... computer types in Z80 format) but not exist ... uncompressed raw) + additional info(registers). Ideally as fileformat compatible with ... -
BUG in SZX snapshots ???I create snapshots of same code in ZX emulators ZXSPIN, SPECEMU, SPECTACULATOR, FUSE and one with SNAPCONV convertor. In snapshot is this code: …
... / ZXSPIN write AF and AF' registers correct (as in SZX documentation ... FUSE write AF and AF' registers incorrect (not as in SZX ... ://www.spectaculator.com/docs/zx-state/z80regs.shtml[/url] -
z80 program to BASIN?I have a BASIC program with UDG:s loaded in a z80 snapshot file. I would like to edit the program with Basin, but I wonder what must be done before…
... UDG:s loaded in a z80 snapshot file.
I ... /> (I tried to load the z80 directly to Basin and it ... -
Super Wonder Boy (missing initial?)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0005053"]Super Wonder Boy[/URL] JGL in the lower right ... is that G middle initial for [URL=…
... right ... is that G middle initial for [URL="http://www.worldofspectrum ... -
Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
... /> Im not a very capable z80 programmer, so having difficulty understanding ... making copies of all the registers at the program start and ... from crashing... Is there any z80 genius out there who could ... -
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…
... ZX Spin. Select Tools -> Z80 Assembler.
To run our ... temporary byte-sized addresses called 'registers'.
The first register deals ... hl,de ;add adds the registers together, so hl points to ... -
FUSE error - cannot load Journey's EndIf you go to the Journey's End page: [URL]http://www.worldofspectrum.org/infoseekid.cgi?id=0002644[/URL] and download the .tap file, that tap file …
... a Spectrum error message (to state the obvious, sorry). I've ... files, in all formats (.tap/.z80./sna/.trd etc) on FUSE ... -
Odd keyboard behaviour due to a single bit failure in +3 ROMI've just fixed a spanish +3, which, among normal issues (drive belt missing), presented a very strange one: the keyboard autorrepeated without a del…
... 48K BASIC. Even the +3 initial menu behaved this way, being ... within the region called K-STATE in system vars).
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…
... ://retrospec.sgn.net/game/z80asm"]Z80 PC Assembler or z80asm[/URL ... the best books for learning Z80... I'm currently using Toni ...Fantasia Diamond (author's middle initial)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0006286&loadpics=3"]Fantasia Diamond[/URL] [URL="http://www.worldofspectrum.org/infoseekpub.c…
... "]Kim Topley[/URL]'s middle initial is W., as per the ...CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…
... machine cycle is? Some docs state it's a [B]memory ... all, and if a real Z80 commits some sort of "dummy ...Correct flag response to BIT n,(HL) etc.When running the test program suggested by Arjun (thanks again), all intructions are passing the flag tests except the BIT n,(HL), BIT n,(IX+dis) and…
... of A rather than the state of IFF2 I think).
Z80 emulator writers, have you implemented ...z80 emulator with converter ?Hi i am finding the old z80 emulator v2 or v3, dont remember. Some of these versions have the snapshopt to 1.45 converter that allows us to conver t…
... /> i am finding the old z80 emulator v2 or v3, dont ... reasson is to use the z80 snapshot loader in the spectrum ...testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... is out by a T-state or more then the speccy ... , the basic rom and the Z80 processor to test if they ... not mean that the T-state for all instructions should be ... the basic rom, ULA, and Z80 processor and memory for the ...LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... RAM. It gives timings for Z80 instructions that are either residing ... ULA to release the wait state first. Machine cycle 4 will ... T-states after M3: the Z80 must idle for at least ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... I have started to learn Z80 machine code - 25 years too ...Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
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Well my exploration of Z80 MCODE continues apace! I am ...SZX Beta 128 (aka TRDOS) block questionHello, I have a question or two regarding the Beta 128 (aka TRDOS) block of SZX. Hopefully someone (Jon, Philip) will help me. What is supposed to …
... I supposed to find the state of the signal_lines, i.e ... the system register), but the registers are accidentally mismatched on store ...Booting with a programIf you ever had a VTX-5000, you'll remember it booted to a menu. The menu itself was written in BASIC. When the Spectrum initialized, this BASIC prog…
... loaded from a filesystem. The initial loading of the program is ... the program in a running state (in accordance with what's ...How to convert TAP to Z80?Hello there! I don't know English language very well, but I need help from you( I want to play ZX-Spectrum games at my Samsug Star mobile phone. I d…
... ] , but it can play only Z80 tape images. How I can ... filetypes (TAP, TZX etc.) to Z80? Help me please :cry:Broken keyboard due to broken ULARecalling csmith's thread about dead ULAs, a thread appeared in the Zonadepruebas (Spanish) forum regarding... a dead ULA, but only a partially dead …
... strong so that the Z80 could read it across ... the data bus on the Z80 side (the data bus ... The tristate condition (high impedance state, when the buffer's outputs ... of signals that the Z80 makes when it wants ... transistor on top of the Z80) but I prefer to ...I hit an electronic jackpot!!!Hi everyone, My computer project can exceed faster than ever!! My school has no electronic or computer teachers so they have thousands of chips and …
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I even got two z80 CPU's that i would ... /> I have loads of buffers, registers and flipflops!!!
All though ... like minimum hardware for the z80 to function?
ThanksPictures of your development setupJust thought it would a good idea to have a thread to show pictures of your Spectrum development room or office. Here are some snaps of my setup... …
... really appreciate that crystal clear state of the art sound output ... ]
My collection of Z80 and Spectrum reference books:
Z80 Based Laptop[url]http://www.retroleum.co.uk/electronics-articles/previous/the-v4z80p-a-z80-based-laptop/[/url]
[url]http://www.retroleum.co.uk/electronics-articles/previous/the-v4z80p-a-z80-based-laptop/[/url]Z80 Processor Interupt helpHi everyone, Currently designing a Z80 computer and i need a little help with these interupts. If i have an I/O device that sends a pulse to the int…
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Currently designing a Z80 computer and i need a ... pin what exactly does the Z80 do? Does it store the ...yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... speccy ROM. Here are my initial thoughts about what I should ... small).
3. Since Z80 has no MMU or superviser ...Z80 disassembler C/C++ source codeHello, I just thought I might share the [URL="http://zxds.raxoft.cz/docs/z80d.cpp"]source code[/URL] of the Z80 disassembler I have written for [URL…
... "]source code[/URL] of the Z80 disassembler I have written for ... way of understanding how the Z80 CPU breaks the opcode sequences ...Using a Z80 CPU in a 48K Spectrum?Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff? Thanks for re…
Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff?
Thanks for reading - weathereye.Is ZX80 really "Z80 only"?The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated o…
The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated on ZX80? How does it compare to Atari 2600's CPU + TIA combo?
