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Z80 from a ZX81 in a Spectrum?Can I put a Z80 from a ZX81 into a Spectrum 48K? It should work even if they both are clocked differently (3.25MHz vs. 3.5MHz AFAIK), right? Thanks,…
Can I put a Z80 from a ZX81 into a Spectrum 48K? It should work even if they both are clocked differently (3.25MHz vs. 3.5MHz AFAIK), right?
Thanks,
Thomas -
Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…
Bizarre stuff in Interface 1's shadow ROMAccording to the Complete Shadow ROM disassembly, the function that exits back to the BASIC interpreter after interpreting IF1 commands is this: [co…
... /> 0018 CHKSYNTAX BIT 7,(FLAGS) Test bit 7 of FLAGS.
Z80 instruction. You can only BIT ... a few instances of invalid Z80 instructions. Presumably some assemblers recognise ...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…
... came across the list of Z80 commands in the dictionary section ...Emulator accuracy test?When I first created my emulator it worked fine. But then I found one or two games that had odd quirks. Eventually I found the flag or command that w…
... !
Is there a test program that, if run on ... to have a emulator accuracy test - sort of Acid3 but for ...Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…
... an ACE allowed me to test the memory and I/O ... mapping routines on the Z80 emulator I did for CCG ...Z80/beeper music siteFor those who don't follow raww.org (and why not? :-) ) you may wish to know about a new website from Yerzmyey, devoted to the music of the humble be…
For those who don't follow raww.org (and why not? :-) ) you may wish to know about a new website from Yerzmyey, devoted to the music of the humble beeper and Z80 chip, past and present...
[url]http://z80.e-demo.pl/[/url]Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... $8000 and select "run". The Z80 will now freeze at the ... window. If you interrupt the Z80 at a random point, and ... Hello Dunny > C:\temp\test.tap[/CODE]
Now open ... and repeat the CAT 1 test it will work fine.
SENDING beeper music from Z80 to AY?Hello. According to [url]http://z80.e-demo.pl/[/url] Z80 sends music-data to ULA (the 1-bit transducer). I was wondering if it's possible to send…
... to [url]http://z80.e-demo.pl/[/url] Z80 sends music-data ... with 3 channels digital music. Z80 can send it to beeper ... with chiptune/synthetic music from Z80. Is it possible to use ...MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…
... implement it.
The test results in the program are ... from an NEC D780C-1 Z80 chip, but Bad Beard has ... kindly tested several other Z80 clones, confirming the [URL="http ...A good site with Z80 ZX Spectrum 48K tunesI found this good site; [url]http://z80.e-demo.pl/[/url] ; I listened to a few tunes yet, and I am [B]AMAZED![/B][B]To me it sounds WAY BETTER THAN A…
... this good site; [url]http://z80.e-demo.pl/[/url] ; I ... would add a second dedicated Z80 chip and ULA for beeper ... be if there were two Z80 and ULA chips that would ....Z80 format question for 128KHello!!! I am working on my ZX Life Shield utility to make it compatible with .Z80 snapshots. I have sucessfully coded .Z80 48K snapshots, but for …
... to make it compatible with .Z80 snapshots.
I have ... sucessfully coded .Z80 48K snapshots, but for 128K ...Faulty M1 pin on a Z80 made from SGS?It's the second time I have come across this: a Spectrum that seems to work ok, but if I attach an Interface 1 or a DivIDE to it, it behaves as is no…
... the M1 pin on their Z80's? Anyone has faced this ...Overflow Flag QuestionHello all, After a long hiatus (lost all code when my MacBook was stolen) i've gone back to the drawing board and am writing a Z80 emulator in REALb…
... board and am writing a Z80 emulator in REALbasic (think VB ... using Phillip Kendall's Fuse Test Suite (excellent) to check my ... AF is 0x0054 whereas the test suite says it should be ...Bit 3 And Bit 5 Of The Flag RegisterHi, I know that bits 3 and 5 are "undocumented" but does anyone know where I can find data on how they are handled? For instance, it would seem th…
... are set in Phil's Z80 test suite when testing INC B ...ROM test cartridge (Ian Logan)?I am trying to find out anything on the Rom Test Cartridge issued by Sinclair Research, for diagnostic testing of the Spectrum. I believe it was issu…
... out anything on the Rom Test Cartridge issued by Sinclair Research ...Test your PC keyboardPlease test yout PC keyboards in ZX emulator. Searches for the appropriate keyboard for real ZX Spectrum / ZX emulator. This is keyboard tester: [url…
Please test yout PC keyboards in ZX ... show active keys. You must test all this keys combintions.
(cursor test)
LEFT+UP+0
Daley Thompson Super TestCan any one post me a picture of that guy with a giant head from Daley thompson super test tug o war? and also what was that charecter name?
Can any one post me a picture of that guy with a giant head from Daley thompson super test tug o war?
and also what was that charecter name?Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... the possible affects of all Z80 instructions etc known?
Z80 machine code in backwards steps ... of the Shock Megademo all test the emulator, as they need ...Z80 ApplicationsI never realised how widely in use the humble Z80 processor was in early Arcade games (Galaga had 3 running in Parallel), Fax Machines, Photocopiers,…
... widely in use the humble Z80 processor was in early Arcade ...Developers developers developers developers developers!OK, I think it's at a stage where someone else can also have a go at doing things with the Spectranet. If you've not been following the hardware foru…
... I've written as a test, or perhaps something completely new ... enough performance out of the Z80 for an SSH client!)
Guess who has passed his driving test this morning ?????Hoorah, i passed my driving test today with 1 minor fault, if you hear of a spate of car accidents in Wakefield you will know i have just got my firs…
Hoorah, i passed my driving test today with 1 minor fault, ... have to take a motorbike test within 2 years ?Self Test Suite for +2I'm sorry if this has already been discussed before, I searched the forum but couldn't find any info: are there any test software to test +2 and get…
I'm sorry if this has already been discussed before, I searched the forum but couldn't find any info:
are there any test software to test +2 and get some diagnostic results?Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…
... working with the Sinclair ZX Test ROM in an Int2.
Have done the whole poke test and it comes back with ... just coz its an easy test - same problem - only 16K
Am left wondering if the Z80 has a dodgy address line ...Can anybody recommend a good ZX Speccy Z80 assembler?I was thinking of using Hisoft Devpac v3, along with some of the cool Z80 textbook scans in the scan repository, to learn some Z80. Anybody use Hiso…
... with some of the cool Z80 textbook scans in the scan ... repository, to learn some Z80.
Anybody use Hisoft ...Assembly (getting my bearings)I wish the WoS book database was organized by theme and contained reviews :) I need your folks help. I'm interested in bringing my assembly into the…
... bringing my assembly into the Z80 and eventually produce some titles ... will also be able to test on the real thing (both ...So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
...
RET NC ; test on out of screen
RST 16
SCF ; C set is succesfull < ...IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... - 7FFFh, thinks that the Z80 wants to initiate a bus ... the ULA stops the Z80 clock until it has finished ... . When the Z80 resumes operation, the ULA ... data bus, and the Z80 can only read FFh ( ... br /> [code] ;Rutina de test del puerto 255. (C)2009 ...25 years with the SpectrumTo paraphrase JFK, ask not what your Spectrum can do for you, but what you can do for your Spectrum. Well I've done quite a bit since I joined the sc…
... /> * Discovering the address of the test code in the 48 BASIC ... to use with BBC BASIC (Z80)
* Suggesting support for command ...plus3e simple ide interface problemhi, I prepared a 8bit simple ide interface 3 days ago, but I got problems (with or without ide cable connected). 1.First of all, I have to press re…
... *seems* ok. how can I test 74LS10N? (I have a spare ... it might be a damaged z80. But +3 works perfect without ...
