-
Odd versions of the Multiface One.I've been looking through the adverts for the Multiface One and it's clear that there were a number of versions available. Note the earliest advert …
... the red button.
I've seen V87.1 and ... by emulators. It uses different I/O ports and doesn't support hypertape ... .
I've tried a bit of ... -
Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... with the Messenger.
I've written my own version ... upon the schematic I drew some posts ago. I've improved that ... ;
/* Decode logic for I/O ports */
decode_ports = A7 # IORQ # ! ... in 48K mode.
I think that this is caused ... -
Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... ]
Even strager: if I use an emulator (Spectaculator) with ... only data bit connected to I/O ports is D7, which has no ... paging registers.
Nevertheless, I think it will be better ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... scheme.
Edit: Ok. I've read the document. It ... Paul didn't implement ULAplus. I can see a number of ... least the choice of I/O ports[1], but I'll be the first ... much better solution. But then I would say that wouldn't ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... email address...[/quote]
Thanks! I've already contacted him :)
[QUOTE=BloodBaz;648300]I'm not familiar with the ... pretty comprehensive.[/QUOTE]
Well... I assumed it's a Spartan ... 's mainly used to map I/O ports of a HDL design to ... -
Anyone identify this hardware?[url=http://postimage.org/image/8u4yputfv/][img]http://s9.postimage.org/8u4yputfv/P041112_13_21.jpg[/img][/url] [url=http://postimage.org/image/4z661…
[QUOTE=Macc;662323]Thats the best we can do of an interior shot of the ZX81 interface, any thoughts?[/QUOTE]
Yup, the Z80 PIO chip is a dead give-away :)
Two 8 bit general purpose I/O ports. -
Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
[QUOTE=mcleod_ideafix;673259]I was wondering... what's the ... adding M1 to this equation? I know that the INTA bus ... signal for all decoders of I/O ports because we absolutly not need ... - on this machines can be I/O decoder with M1 absolutly unusable ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... bus data)
- access to I/O ports slow-down CPU (ula slow ... also good, but make fast I/O ports cause small incompatibility with original ... of fixed chip with original I/O space contention:
[url]http ... -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
I notice that you are asking ... />
So, short and sweet: I own only 48k machines and ... selector
- uses 8 I/O ports in the domain: xxx11111, and ... /> [QUOTE=jamorski;674964]Comparability wise, I suppose its down to if ... -
Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…
... Atmega328 (together with an SPI I/O expander) to build a PS ... of experience.
I think I got everything right on the ... better said: no time ) for I/O extenders.
The 'Parallel ... the limited number of available I/O ports: maximum 4, while 8 would ... -
Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…
... better said: no time ) for I/O extenders.
The 'Parallel Slave ... the limited number of available I/O ports: maximum 4, while 8 would ... required.[/QUOTE]
Yeah, I think it was a case ... plenty from the experience though. I'll more than likely end ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... to determine which set of ports to decode (drive 1 or ... with one or two control ports. The DISCiPLE is slightly unusual ... ) upon access to the WD1772 I/O ports.
[QUOTE]Edit: ... with any particularly complex logic), I imagine cycling through all input ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... (hopefully) complete. I had false writes to ULAplus I/O ports, and it happened ... when asserted. That caused some I/O requests to be lost, ... basic specification is complete, I've created a new slideshow ... [/url]. Instead of that, I've created a little utility ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... />
All ULA I/O ports must be contended, as there ... /> - Contend all I/O ports
- Do a preventive I/O contention based upon ... The first option, contending all I/O ports, implies that the only ... now we contend ALL I/O ports. I haven't seen issues ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... br /> - Contend all I/O ports
- Do a preventive I/O contention based upon ... fourth option: contended even I/O ports and uncontended* odd I/O ports. [I](* Or very little ... contention.)[/I]
One ... -
Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... respond to a range of I/O ports.
[*]Or use a "port ... to output a value to I/O port 31 to select which ... then reads the joystick from I/O port 31.
[*]Or if ... levels.
[/LIST]
[I][B]Mark[/B ... -
DIVMMC, a new compact interface for ZX SpectrumAfter a long gestation period and a short period of testing, Mario Prato, member of the Italian [URL="http://apuliaretrocomputing.wordpress.com/"]Apu…
... his website.[/QUOTE]
I know some details (but in ... IDE connector
- two new I/O ports for SD card access (may ... for divide memory paging, SD ports #E7 (write only) and #EB ... IDE by Pera Putnik - (As I know, all users on +3e ... -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
[QUOTE=Dan Antohi;675008]- uses 8 I/O ports in the domain: xxx11111, and therefore does not clash with any original Sinclair hardware[/QUOTE]
Dan Antohi, may modify your OS so that memory management was carried out through a single port wr #7F?. -
Writing to MIC portSo I had a new crazy idea: How about a stereo beeper engine? Since we can set bit 3 on port $fe to output to MIC, writing such an engine should be ra…
[QUOTE=aowen;716043]I wonder ıf audıo ın and out ... again. Somehow addressing the i/o ports on Zeddy is very quirky ... nothing like on Spectrum. I've made several attempts to ... on the 81, and I don't really understand why ... as a Spectrum. Well, I've given up for now ... -
ULAs interchangeable across issuesHi all, Now that I'm retired, I'm looking again at 8 bit computing :) I'm attempting to revive a spectrum 48K. I'm going to swap chips in/out from…
... overly aggressive contention when accessing I/O ports, and shouldn't have much ... -
DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…
... [/B]
;(adressation of ports 111ab01x = may be used also ... But in schematic I see that all FDD ports use incomplete adressation ... - divide work only as IDE ports).
[URL]http://velesoft. ... can be used only as I/O ports (external memory access is ignored ... -
Transistors 101Hi, Im a complete novice when it comes to electronics and would appreciate any help that can be given. Im replacing the transistor that sits on to…
... eliminate overly agressive contention of I/O ports which would cause issues with ... /> If this is the case, I'd go from first principles ... -
Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …
... MB02 memory/internal or external I/O ports. DMA chip is clocked at ... easy for description here, but I can later release some examples ... -
DivIDE+ with SpectranetHi all, I've recently bought both a DivIDE+ and Spectranet from RWAP and I was wondering if it's possible to use them both together. I have a 48K+,…
... connector with modified signals. As I know, then +5V is ... devices are usable only as I/O ports (external memory in spectranet is ... can work because use identical ports and memory paging as ... compatible with Spectranet ).
I mean that ZX bus is ... -
IF2 troubleMy IF2 has been happily working forever until today, no matter what Spectrum I plug it into I get coloured blocks all over the screen, did the obviou…
... logic - decoding addressing of I/O ports and providing joystick state on ... -
Addresses in Fuse debuggerFrom Fuse man page: [I]Addresses can be specified in one of two forms: either an absolute addresses, specified by an integer in the range 0x0000 t…
[QUOTE=TK90XFan;731402]I have to disagree. ... shell.[/QUOTE]
I like the sound of that ... idea.
I'd also like the ability ... register snapshots, memory paging, I/O ports, perhaps) and see what led ... up to that point, i.e. "roll back in ...
