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How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…
... /> Don't forget, ALL the Z80 control signals have to be ... Z80 CPU.[/QUOTE]
I was wondering already what level of emulation ... -
Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
The ROM tester you linked to needs to ... or control lines between the Z80 CPU and the rest of the ... short circuit) will prevent the Z80 CPU from reading the correct information ... from the ROM. The Z80 will then only read rubbish ... -
Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
[QUOTE=1024MAK;688475]The ROM tester you linked to needs to ... or control lines between the Z80 CPU and the rest of the ... short circuit) will prevent the Z80 CPU from reading the correct information ... from the ROM. The Z80 will then only read rubbish ... -
RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…
... the "A0" line between the Z80 CPU (IC9) and the ROM socket ... the "A0" line between the Z80 CPU (IC9) and IC10 (Amstrad 40058 ... will also buy today some new ram ic's ΜΝ4164P-12 ... -
I thought I'd give assembly a goAnd well being an absolute newb,I'm absolutely useless.I need your help. I thought I'd give this a go in zxspin [url]http://chuntey.wordpress.com/20…
... ;691578]Stumbled upon this one, new for me:
[URL=" ... www.zilog.com/docs/z80/ps0178.pdf"]Z80 CPU Product Specification[/URL]. As ... .zilog.com/docs/z80/um0080.pdf"]Z80 Family CPU User Manual[/URL ... (duh... they produced the first Z80's, IIRC :-) ). As regular ... -
Corrupt paper on zx spectrum 48kHi. When I power up my spectrum (issue 3) I get the light grey border, but the paper is black and it switches between thin red vertical lines and thi…
... to know what instructions the Z80 CPU is processing. This is hard ... system is faulty, the Z80 may be processing random instructions ... fit sockets, buy some new (well, new old stock, as these ... combinations (depending on how many "new" chips you have).
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Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... this is the case, a new ASIC is almost certainly required ... . Fitting a new one isn't a task ... /> The Z80 CPU is probably on a socket - try a new one.
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... . Replacing the Z80 CMOS CPU to the original NEC CPU solved the problem ... that this question is not new, so I present my recent ... no problems. With the Z80 CMOS CPU the situation was even worse ... CLK pin of the Z80 CPU with the different CPU types. The clock ...Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
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[LIST]
[*]A new membrane that will last for ... or one year...
[*]A new PSU, okay, Sinclair PSUs for ... , pictures of the ULA and Z80 CPU (the two 40 pin chips ... , these can sometimes prevent a new membrane from making good contact ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... address output pins on the Z80 CPU :confused:
[I][B ... works or pop in a new cpu then.
thanks for your ... /> but what would cause the cpu to Halt ?Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... /> Do you have a different CPU to check? (as there was ... M1 signal and even a new CPU could have a problem with ... /> I have tested 2 different cpu I have at home but ... ) zilog z0840004psc z80 cpu 9010 oj
2) zilog z84c0006peg z80 cpu 0804 86Why do modern computers go slow?I'm not so much thinking of home PCs slowed down by viruses, more the extent that modern programmers think about the speed of their code. For exampl…
... the crud out of the cpu ,eat hard drives and sniff ... the BBC's 6502 or z80 cpu.. dunno if there were more ... with a little help with new machines..
things like ...Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…
... a rubber 48K with Zilog Z80 of which the M1 line ... me, and I replaced the CPU.
The DivIDE works fine ... of the M1 line from Z80 CPU's from different brands.
new interfaces in the future.Diagnostic Board (Winston designed) PCB'sHi everyone, I had these made earlier in the year, built mine then promptly mislaid the others until now :) and I'd like to offer these to the commu…
... - I suggest you start a new thread in the hardware section ... ) will only work if the Z80 CPU is working and the address ...ZX-FPGA dev boardI've been sporadically working on this: [IMG]http://photo.alioth.net/tmp/spectradvi.png[/IMG] It's an FPGA dev board for the Spectrum. It uses a CP…
... it actually have a real z80 CPU?[/QUOTE]
It plugs into ... without having to get a new PCB made up each time ...MISSING M1 LINE ON +48????I was posting questions about my DIVMMC enjoy not working on one of my +48`s and have now got round to testing if its cpu related.Trouble is the one …
... +3). Further, a brand new CMOS Z80 CPU works in most Spectrums (and ... use the Z80 /M1 output to detect when the CPU is fetching ... some Z80 p0rn and some sexy Z80 info [URL="http://www.cpu-world ... .com/CPUs/Z80/MANUF-Zilog.html"]click ...48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
... have a ROM based RAM tester. There are a number of ... cartridge which contains a RAM tester program[/URL] can be used ... " RAM, as long as the Z80 CPU, the address, control and data ...ZX81 and Analogue TVsI recently bought a really nice ZX81 on ebay in amazing condition, but I'm having issues tuning in an old analogue TV to lock onto the signal. I und…
... will see various brands of Z80 CPUs for example.
Z80 CPU and the ROM are socketed ... . This board fits on the Z80 CPU and effectively changes one byte ... the code (the “improved” or “new” ROM) corrects this bug. However ...Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…
... speed. The speed of the Z80 CPU is controlled from the clock ... once.
With the new caps the Issue 6 display ...Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... another system. That's what emulation means. It doesn't matter ... 's just a firmware-based emulation rather than a software-based ... emulation.[/QUOTE]
[QUOTE=joefish; ... of which run on a Z80 CPU without having to be pre ...Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... ]Using a FPGA is not emulation. When programmed, a FPGA will ... as a Z80 CPU, a ULA and memory. Whereas an emulation program running ... on a different processor has to convert each Z80 ...Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... on one FPGA was an emulation (as opposed to a clone ... chip different than having a Z80 CPU, ULA, ROM and RAM on ...Resurrection of ZX SpectrumHello everyone. I recently emerged from my attic bearing my childrens 128k ZX Spectrum +2 with a bag of games etc. Like many before it hasn't seen…
... ROM chip fault or a Z80 CPU fault.
... faulty. But as the Z80 CPU only has very simple ... (s) using the simple Z80 machine code instructions), any ...
Next, if the Z80 CPU is socketed, change this for ... another known good CPU, or for a new one (CMOS ...Interface 1 putting me in 48kHi All, I have a 128 toasty with interface 1 connected to a PC via serial. If I save a basic program using 'SAVE *"b" LINE 10', all is well. If I …
... , then it's either the CPU or a dirty edge connector ... haven't already), failing that new Z80's are still available from ... ://www.bytedelight.com/?product=new-z80a-or-compatible-cpu"]sells[/URL] them ...Interface 1 putting me in 48kHi All, I have a 128 toasty with interface 1 connected to a PC via serial. If I save a basic program using 'SAVE *"b" LINE 10', all is well. If I …
... it's either the CPU or a dirty edge connector ... t already), failing that new Z80's are still available from ... bytedelight.com/?product=new-z80a-or-compatible-cpu"]sells[/URL] them ... it is a bad Z80 after all. Not sure ... has a socketed rom and z80, the other has no ...ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
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That's the correct Z80 behaviour, DEC BC and all ... although a little unclear for new users, BC isn't a ... nothing to do with the z80 CPU per se, it doesn't ...Grey +2 - DOA and no power lightTook a punt on a grey +2 at the weekend to be a spare. It was "untested" although so were all my other +2's which are all fine. Tried to power th…
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I trust that the new regulator is attached to it ... on each pin of the Z80 CPU with respect to 0V/GND ...Access to ZX81-Service ManualI need the ZX81-Service manual to repair my sick Zeddy. Unfortunately I don't get access to WOS documents via ftp. How can I register? For the ZX-S…
... /> The Z80 CPU is fairly reliable, but do sometimes fail. New CMOS Z80s ... still a limited number of new old stock chips available. It ...Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... ARM is doing the Z80 / ULA emulation along with creating both ... C[/u]hip means ARM cpu + any number of ... easy, and leave the cpu to focus on emulating ... course a modern, pipelined cpu with 32 bit internal registers ... to re-program the ARM cpu. And flash memory! ( ...Were there other graphic modes for the ZX Spectrum?I've read that there was a "hi-color" mode that allowed the color clash to be 8x1 instead of 8x8. Maybe I have the name of that mode wrong. I'm…
... was build up by the Z80 CPU doing half the work with ... the ULA helping. If the CPU was not allowed to build ... , as it is the CPU's job to generate the ... was not suitable. But the new machine was still intended to ... is not a lot the Z80 CPU can do to change things ...
