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Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…
... from a few threads on here that some Wossers ... a number of unrelated Z80 projects on the web that involve ... of these are using Z80 CPU's running at 20-25MHz ... tell me what limit is on RAM? How much could ... like to see some progress on the hardware front, similar ... -
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 into ... -
MISTER BEEP - new album with ZX musicHi, normally I don't like my tunes too much :) but this time I would like to proudly present to ZX universum: MISTER BEEP - "A thousand furious b…
... /> 1-bit multichannel chiptunes made on ZX Spectrum 48K (beeper). < ...
- 4 stereo songs made on two synchronized Spectrums (Special FX ... chiptunes - I just make music on a soundchip. :)
Hence, ... huge effort for Spectrum's Z80 CPU, so the engine can ... -
Taking the Spectrum for a bath - Lots of SEXY photos!Decided to take a Spectrum +2 for a bath this weekend. It was non-working, so it needed fixing. It booted to a fuzzy dark picture and I thought "Ah, …
... see the cassette mechanism on the left and the ... others must have grease on them.
Usually ... previous owner)
On the last shot, you ... />
Moving on to the membrane, this was ... a little heatsink onto the Z80 CPU. This *probably* dosen ... -
Happy 70th Birthday to Federico Faggin!On this day in 1941 in Vicenza, Italy sprang forth the conceiver, architect and co-designer of the humble Z80 CPU. Happy Birthday Federico, thanks f…
On this day in 1941 in Vicenza, Italy sprang forth the conceiver, architect and co-designer of the humble Z80 CPU.
Happy Birthday Federico, thanks for your part in making the Spectrum the machine that it was and still is. -
The Sinclair ZX Microdrive Resurrection Project (long)Dear Spectrum fans! [Management summary: Download [url]http://www.bartheld.net/temp/mdv2img.zip[/url] and tell me what you think. All help very much…
... case, together with a better power supply, separate voltage regulator, ... fascinatingly enough, the little Z80 computer was "booting" right ... and the binary Z80 machine code file on the other.
on the Z80 assembler code (there might ... -
Embarrassing MHz question....(Hangs head in shame; you may throw tomatoes and mouldy fruit at me.) What is the standard speed (exact please!) of the Z80 CPU in a 48K ZX Spectrum…
... speed (exact please!) of the Z80 CPU in a 48K ZX Spectrum ... MHz and 3.54 MHz on the internetz and I don ... -
+3e Strange IssueHello there my fellow WoS'ers I am absolutely perplexed by the following problem, I am hoping that someone more enlightened than I can help [I](no…
... INDENT]8bit IDE adapter
Z80 CPU (new)
512MB CF Card ... under +3e ROM, DivIDE corrupts on BOOT[/indent]
on the motherboard is kept ... & cable all work on thoer +e machines.
... perhaps a state lock on the M1 how would ... -
A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …
... to waste my spare time on.
It is still not ... as follows:
3.5MHz Z80 CPU with 7MHz turbo mode (hot ... slow going as i work on this in my spare time ... -
Velesoft's ZX128+2 with 1.5MB memoryMy old ZX128+2 PROFI (grey model - spanish version) for sale here: [url]http://aukro.cz/super-zx-spectrum-128-2-1-5-mb-i2738723874.html[/url] Back s…
... any time FAST mode = CPU will run at full ... can slow down only CPU only in access to ... pulse is active after power-on, after press RESET button ...
- all dram chips, CPU,rom, hal, TEA2000 and some ... br />
Menu after power on:
[img]http://velesoft. ... -
DivIDE problemsHello, Can anyone advise me on the problems I got with a DivIDE please? I bought it off someone second-hand and it has not worked properly from the …
... application FATware 0.12 on it.
The ... couple of .TAP and .Z80 on it but nothing.
... I changed formatting etc. on the HDD but always the ... disk clicking once, light on CF interface flashes once ... +5V/0V on the external FDD power on the CF interface ... -
Designing a Modern 'Professional' low cost ZX Spectrum ??Hi, I'm looking at designing a low cost hight performance (20MHz) ZX Spectrum... in the mould of the original, but using modern-day components. The…
... ?50)
Z84C0020 20MHz Z80 CPU
128K Fast SRAM
All on a professional compact PCB
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. :(Cheap electronic kits for hobbyists/Students etcAs prices start to get silly on ebay for electronic components like CPUs, Memory etc, I've sourced two suppliers from China that do me great deals. …
... start to get silly on ebay for electronic components like ... />
Z84C0020PEC 20MHz Z80 CPU
R65C02P4 4MHz 6502 CPU
MC68008 8 ... -16MHz 68008 CPU
HD63B09 2MHz+ 6809 CPU
...DIVIDE versus ZX128 ROMDivide interface use hardware mapping of extra memory on this fixed points in 48rom: #0000 - power-on/reset/rst0/software restart #0008 - syntax erro…
... points in 48rom:
#0000 - power-on/reset/rst0/software restart
power-on and ZX start in USR0 ... ROM1) and use different routines on mapping points in external rom ... 128editor and press ENTER then CPU jump to #3Dxx adress and ...Flashing systems on DIVIDE interfacesSome peoples can't reflash eeprom chip in Divide interface (original Divide, Divide 2k11, Divide 57d2/57d3). EEPROM chip AT28C64B contain feature fo…
... in eeprom if jumper E on divide is open and rom ... ]
If flasher utility on your Divide show error message ... and copy to root directory on CF card all files and ... /> Insert CF to DIVIDE PLUS, power on ZX and .... ESXDOS 085 work ...Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... mechanism. Then after reset/power on start ZX automatically to TR ... external memory are connect and CPU read instruction from adress # ... rom will automatically disconnect if CPU jump to ZX ram ( ... BETA128 ports are invisible for CPU and external devices. If ...Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…
... divide systems must after reset(power-on) always switch ZX to ... #1FF8 in external memory, cpu read instruction byte from adress ... memory is immediately connect and CPU read instructions from external ... connect external memory and cpu read instruction byte from ...Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…
... 11111101)
[B]After POWER-ON or RESET[/B] is MF3 ... MAGIC button interface detect if CPU read instruction byte from address ... connect external MF3 memory and CPU continue on adress #0066 in MF3 ... memory is not connect and CPU set bit D0 of port ...Another broken SpeccyHi all I have been given another ZX Spectrum, this time it has a really odd problem as you can see in the video: [URL="http://youtu.be/ZOSiBEYQD7w"…
... - no change
Checked the Z80 on another Spectrum - all good, works ... fine
Checked the ULA on another Spectrum - all good, works ... video is what happens at power on - just will not boot!
Homebrew ZX Spectrum kits for DIY builders !Hi. I'm considering selling Homebrew ZX Spectrum kits on ebay... hopefully at a low price ! They'd consist of : Z84C0020PEC Z80 CPU …
... selling Homebrew ZX Spectrum kits on ebay... hopefully at a low ... consist of :
Z84C0020PEC Z80 CPU DIP $1.50
128K ...Homebrew ZX Spectrum kits for DIY builders !Hi. I'm considering selling Homebrew ZX Spectrum kits on ebay... hopefully at a low price ! They'd consist of : Z84C0020PEC Z80 CPU …
... selling Homebrew ZX Spectrum kits on ebay... hopefully at a low ... consist of :
Z84C0020PEC Z80 CPU DIP $1.50
128K ...Spectranet questionsI have received the wonderful Spectranet interface from RWAP today. I have started to experiment with it and I have found an interesting thing... So…
... replaced the NEC D780C-1 CPU of my Spectrum+ 48K machine ... Z84C0006PEG NMOS/CMOS Z80 CPU because the desoldered original CPU have short legs ... IP address was not displayed on the top of the screen ... contacts of the original NEC CPU and put it back to ...My attempt to restore the CPU clock signalI know Winston has already got this, but I can't see any thread with details about it. Only wanted to share my (still early) results. I'm not taking…
... Breakout.
Having a CPU in-phase clock signal is ... internal ULA and the CPU, without relying on the Y signal, as ... . The output is the restored CPU signal clock, with the same ... phase as seen by the CPU itsef, i.e, it's ...Sinclair's Cancelled ProjectsDoes anybody have anymore info on any of these projects or are there any old Sinclair engineers on the Spectrum scene that could shed a little more l…
... there any old Sinclair engineers on the Spectrum scene that could ... shed a little more light on them?
Cancelled ... Spectrum-compatible with a faster Z80 CPU, a built-in ZX Microdrive ... two engineers who had worked on the project, John Mathieson and ...Z80 Special ResetThe Z80 CPU has two types of reset, normal and special. The latter is little-known and for more information please see [url]http://www.primrosebank.n…
The Z80 CPU has two types of reset, ... ]http://www.primrosebank.net/computers/z80/z80_special_reset.htm[/url]
Strange keyboard port reads on 48+Hi all, I don't know whether it was already discussed (I also searched forum, but there are too much of results searching "48k keyboard" so I didn't…
... it how are designed traces on two layered membranes (do anyone ... , which repeatedly reads port EFFE (on different addresses) and if it ... /> ASM part:
[CODE] cpu z80undoc
relaxed on
org ...Could ELITE's wireframe graphics be improvedWas watching this video last night comparing the BBC and Spectrum version of Elite: https://www.youtube.com/watch?v=Ov4OAteeGWs It seems that the…
... 's the fault of the Z80 CPU that the Speccy couldn't ... it was still quite early on in the Spectrum's life ...R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…
... Register.
The Z80 CPU contains a memory refresh counter ... counter is sent out on the lower portion ... : There is large margin on the refresh timing, so ... register content is dumped on the address bus lower ... (the 2 I tested on), increment twice for " ...Retromania: 40 years of the Z80 game coding contestAs usual, Retroacción is holding a coding contest for Retromañía (held in November), with cash prizes! This year we're celebrating the Z80 CPU's 40th…
... year we're celebrating the Z80 CPU's 40th birthday with a ... Z80 game coding contest. *Any* Z80 based system will ... -en-ensamblador-para-el-zilog-z80
