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Spectrum DIVIDE and Kempston Interface ProbsI got my DIVIDE quite a while back and was using it on a Spectrum +3, but noticed some games loading corrupt and not all games having proper joystick…
More photos of ZX BUS expander:
[url]http://velesoft. ... modes are unusable on ZX128+2A/+2B/+3 (this models can ... -
NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…
... I have to use a bus expander (Currah uSlot) ... On Spectrum mdels prior to +2A/+3, Sinclair and Protek mode ... inhibit normal keyboard function. +2A/+3 is incompatible with any ... garbage to the data bus when the device is ... assume that the data bus is always FFh when ... -
BETA-DISC (TR-DOS) support in ZX emulatorsBETADISC 128 is original device designed for external use with ZX Spectrum 128/+2(grey). Russians ZX clones (Pentagon, Scorpion, ZX profi, Quorum, ZX…
... +2 models. +2A and +3 use incompatible system bus with impossibility connect ... -
BETA-DISC (TR-DOS) support in ZX emulatorsBETADISC 128 is original device designed for external use with ZX Spectrum 128/+2(grey). Russians ZX clones (Pentagon, Scorpion, ZX profi, Quorum, ZX…
... interfaces connected at Betadisk's BUS (not between Betadisk and ZX ... for any model except the +2A and +3.[/QUOTE]
BUS. Betadisk interfaces have own 7805 ... -
Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
... resistor" fix I've seen floating about that just adds the ... haven't listened to a +2a AY output to compare. I ... -
MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…
... feature(OUT 23,192) with +2A/+3 models ? This models need ... /> And reset signal from ZX bus must be boosted (74LS244 etc ... -
MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…
... feature(OUT 23,192) with +2A/+3 models ? This models need ... /> And reset signal from ZX bus must be boosted (74LS244 etc ... -
New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... IDE ports (DIVIDE on ZX bus) for good comfort. Soon I ... work also with 128+ and +2A? -
Which kempston joystick schematic is the best?I'm looking for the best Kempston Joystick interface schematic. It has to be as cheap as possible. But it must be as compatible as possible. I've c…
... interface or internal keyboard in +2A/+3 models).
This ... from your interface to ZX bus via resistors (can be used ... , type B) 120 Ohm (data bus protector). And M1 line is ... -
Which kempston joystick schematic is the best?I'm looking for the best Kempston Joystick interface schematic. It has to be as cheap as possible. But it must be as compatible as possible. I've c…
... better use resistors on data bus (elimination of data collision with ... (then D7-D5=part of floating data bus, D4-D0=joystick data ... -
MB02 picsI got an original MB02 from someone to fix, and of course I made some pics to share (click for magnification): [URL="http://benophetinternet.nl/hobb…
... the data bus you should see high and low and floating level ... time but the contacts had floating resistances...
Ingo ... -
The impossible made possibleSome years ago Miguel Angel Rodriguez Jodar and I developed the PC Keyboard Interface (still available at SellMyRetro.com). The interface however wa…
... lack of resistors on the +2A, +2B and +3 that's ... interface that deliberately causes a bus collision and relies on the ... -
pc keyboard for speccyis it possible to use a ps/2 keyboard for a speccy. I have a +2A, spectrum+ and toastrack, which all have broken keys. So an external keyboard woul…
The +2A is not supported as a ... and Y connectors in your +2A, it should work.
To do that:
- Remove bus connector and pass-thru connector ... -
pc keyboard for speccyis it possible to use a ps/2 keyboard for a speccy. I have a +2A, spectrum+ and toastrack, which all have broken keys. So an external keyboard woul…
[QUOTE=mcleod_ideafix;615714]The +2A is not supported as a ... and Y connectors in your +2A, it should work.
To do that:
- Remove bus connector and pass-thru connector ... to modify the matrix array (+2A's ULA) logic so it ... -
Can I make incompatible devices compatibel?[FONT=Arial,Helvetica][SIZE=-1]Which lines must I switch to make incompatible devices compatibel? From MGT gives it the TWO Faces. But on the pics I …
Check this out:
[url]http://microhobby.speccy.cz/150203/hardware/bus.html[/url]
The last picture, at the bottom of the page, shows a device called "fixit", used to connect a PlusD device with the +2A/+3. Connection diagrams are included. -
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…
... , as it happens in the +2A/+3 models.
I ... to rewire the buffer output bus to share the same resistors ... the VRAM bus has, and using spare gates ... -
Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
... resistor" fix I've seen floating about that just adds the ... (48/toastrack/grey) or closed (+2a/b/+3)
has ... -
Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …
... : this won't work on +2A/+3 models. For these computer ... your microcontroller.
Address bus pins A8-A15 will be ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... plug in (especially on a +2a/b/3)?[/QUOTE]
The +2A/+3 is a different beast ... (35MHz) available at the rear bus so using that clock and ... -
Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …
... may not be the data bus or the Z80 I/O ... the bank switching are sometimes floating due to a poor (dry ... , maybe it is the data bus pins here you need to ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... TK90X model 2" and "TK95": "floating" bit, usually value "1" (due ... "residual sign" on data bus when accessing the video memory ... [LIST]
[*]"TK90X model 1": "floating" bit, usually value "1";
bus when accessing the video memory ... -
Spectranet and toastrack issueI've been using my spectranet with no problems on my standard 48k but just started using it on the toastrack and am having an issue. That being that…
... marginal, it has a long bus with a great deal of ... with the Amstrad +3 and +2A. (Indeed, much development was done ... -
Spectranet and toastrack issueI've been using my spectranet with no problems on my standard 48k but just started using it on the toastrack and am having an issue. That being that…
... marginal, it has a long bus with a great deal of ... with the Amstrad +3 and +2A. (Indeed, much development was done ... -
The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... kempston data with ZX data bus via resistors 100-150 Ohm ... slow/fast ram pages layout (+2A/ZX128 layout).
- as ... output signal /RESET on system bus (reset will only output, external ... -
The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... kempston data with ZX data bus via resistors 100-150 Ohm ... slow/fast ram pages layout (+2A/ZX128 layout).
[/QUOTE]
bus (reset will only output, external ... -
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…
... USB device with a ZX Bus on it, and maybe audio ... custom device. Without the ZX Bus it really is just the ... we call ZX +128k, +2, +2A or +3 is a "hardware ... /> Don't worry about ZX BUS, it is easy to add ... -
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…
... we call ZX +128k, +2, +2A or +3 is a "hardware ... /> Don't worry about ZX BUS, it is easy to add ... -
Spectrum +2A/B - CPU affects loading??Hi everybody, Here's something I don't understand. A +2A came in the other day, and it was working fine, but wouldn't load some tapes. OK, thinks I…
... at all in a stock +2A computer (it is merely connected ... usually means that the data bus might suffer from corruption or ... -
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…
... ’ (48,+128,+2) – ‘Two ROMs’ (+2A,+2B,+3) Spectrum model selector ... ?A !!! leakage on the data bus and 1 (one) !!! standard CMOS ... wise, if its not +3/2a edge connector compatible.[/QUOTE]
