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DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…
... /> - connect signal U16 from ZX bus connector to pin 1 of ... /> - connect signal U17 from ZX bus connector to pin 2 of ... | 4A | 0 | 0 | 0 |
2A |4 11| 4Y | 0 | 1 ... -
DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…
... /> - connect signal U16 from ZX bus connector to pin 1 of ... /> - connect signal U17 from ZX bus connector to pin 2 of ... | 4A | 0 | 0 | 0 |
2A |4 11| 4Y | 0 | 1 ... -
So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... /> My idea, applicable to pre +2A/+3 models, is to have ... circuit examines what kind of bus access is to be performed ... -
RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…
... possible, at least on pre +2A/+3 Spectrums, which have a ... INT signal at the rear bus, to the INT pin at ... a FFh on the data bus during the INTA cycle, if ... compliant devices will perform complete bus decoding, and will take into ... -
Spectrum +2 wantedLooking for a fully working Spectrum +2 Dont need any games but if you got them then they are always welcome addition. I Will need the psu and the o…
... is pretty steep for a +2A. For that price I'd ... source, and rewired the expansion bus to match the original. I ... -
128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…
... when the Z80's address bus goes into high-Z state ... gate isn't just left floating. -
128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…
... when the Z80's address bus goes into high-Z state ... gate isn't just left floating.[/QUOTE]
So, something like ... -
TR-DOS and DIVIDE emulationSome ZX emulators ([B]SPIN, FUSE, SPECEMU, SPECTACULATOR[/B]) contain configuration menu with possibility select ZX Spectrum model and interfaces. Bu…
... ZX models use different ZX BUS connector. For example ZX48 and ... ZX128/+2 use compatible bus pinout, but +2A and +3 use new ... use some extra pins on bus = interface need different design.< ... br /> - ZX emulator with ZX bus emulation with possibility connect *.SCH ... -
TR-DOS and DIVIDE emulationSome ZX emulators ([B]SPIN, FUSE, SPECEMU, SPECTACULATOR[/B]) contain configuration menu with possibility select ZX Spectrum model and interfaces. Bu…
... model (ZX48/128/+2). On +2A and +3 is it impossible ... :
- ZX emulator with ZX bus emulation with possibility connect *.SCH ... -
Opinion on new 128K only gamesHello, Being new to the WOS community, I am unclear on the attitude towards 128K only software, that is; Is there a strong need to support the 48K m…
... and won't disturb your floating data bus state. -
Spectrum +3 and DivIDE+I have won a +3 on ebay. When it arrives, I know that I can use my DivIDE+ with it, but I have read about the +3E ROMs. I mostly use Spectrums to pla…
... data values and on data bus will collision. But it's ... use with ZX128/+2). On +2A and +3 this versions work ... incorrect. For +3/+2A must be used original FATWARE ... -
Spectrum +3 and DivIDE+I have won a +3 on ebay. When it arrives, I know that I can use my DivIDE+ with it, but I have read about the +3E ROMs. I mostly use Spectrums to pla…
... data values and on data bus will collision. But it's ... use with ZX128/+2). On +2A and +3 this versions work ... incorrect. For +3/+2A must be used original FATWARE ... -
Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…
... , so data pins are left "floating" and the value of a ... floating data bit is '1' in ... faulty memory chip are not floating, then, with time, the faulty ... a '1' into the data bus while your working memory chip ... , so its data pins keep floating. -
Splitter & fixer & Kempston joystick interfaceI'm thinking of developing a small interface that combines these three elements: 1. A splitter like the [URL="http://www.worldofspectrum.org/infosee…
... printer (as the signals on +2A/+3 models are different when ... 6 prototypes) for my ZX-BUS-PROTECTOR are ready for soldering ... . My last version of ZX BUS PROTECTOR contain also ROMSC/ROMOE ... and -5V absent on +2A system bus (this need hardware patch in ... -
Splitter & fixer & Kempston joystick interfaceI'm thinking of developing a small interface that combines these three elements: 1. A splitter like the [URL="http://www.worldofspectrum.org/infosee…
... 6 prototypes) for my ZX-BUS-PROTECTOR are ready for soldering ... My last version of ZX BUS PROTECTOR contain also ROMSC/ROMOE ... and -5V absent on +2A system bus (this need hardware patch in ... ZX128+2A/+2B/+3 computer.... )[/QUOTE ... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
... possible connect to new ZX BUS any interface (interface 1, ... data bus. Enable use allram mode on ZX Spectrum 128+2A/+ ... connect DIVIDE direct to ZX bus and KEMPSTON JOYSTICK interface ... line = old design) after BUS-PROTECTOR. Residos installation without problem ... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
... as primary interface then ZX-BUS-PROTECTOR can be always connect ... KEMPSTON is problematic if ZX-BUS-PROTECTOR absent...
[QUOTE ... />
Bad contacts on ZX bus / bad Z80 CPU / modified rom ... your +3 / disconnect jumper for +2A compatibility.... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
... primary interface then ZX-BUS-PROTECTOR can be always ... KEMPSTON is problematic if ZX-BUS-PROTECTOR absent...
...
Bad contacts on ZX bus / bad Z80 CPU / modified rom ... your +3 / disconnect jumper for +2A compatibility....[/QUOTE]
... -
What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... the hardware fix for the +2a/b/+3?
[IMG ... read from the video data bus, by means of three-state ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... without collisions on data bus. ZX BUS PROTECTOR is multifunctional adapter ... peripherals using ROMCS signal to +2A/+3 bus
- remove data ... same time send to data bus different value. Unstable incorrect ... value from data bus is writed to divide plus ... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
... ://velesoft.speccy.cz/other/zx-bus-protector-boards.jpg[/img]
- data bus protection
- can be used ... with external memory on ZX128+2A/+3)
- can 100% disable ... -
Z80 Edge Connectors - ProjectsHello there my fellow Spectrum-mites I am looking to source a few of these connectors - while I could just rework some old ISA socket for proto's I …
... attached to the Z80 expansion bus, or do they need to ... /> i.e.
my +2A has stock +2 ROM's ... off the back of a +2A/B or +3 - possibly with ... -
Z80 Edge Connectors - ProjectsHello there my fellow Spectrum-mites I am looking to source a few of these connectors - while I could just rework some old ISA socket for proto's I …
... attached to the Z80 expansion bus, or do they need to ... /> i.e.
my +2A has stock +2 ROM's ... off the back of a +2A/B or +3 - possibly with ... -
Opus composite video and joystick portIve had it apart and had a good look around and cant for the life of me see whats wrong, if the joystick is selected in a game(kempston) the characte…
... /> Just pulled up the expansion bus pinouts
[img]http ... being transported to the Z80 bus.
can I ask ... not connected, and on the +2A, +3 it is ROM2 OE ... -
contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
... /O contention and the dirty bus?[/QUOTE]
[url]http ... #7FFD (same as on ZX128+2A/+3)
- reading of port ... ignored (same as on ZX128+2A/+3)
- new memory layout ... ram (same as on ZX128+2A/+3)
[B]- I/O ... -
contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
... #7FFD (same as on ZX128+2A/+3)
- reading of port ... ignored (same as on ZX128+2A/+3)
- new memory layout ... ram (same as on ZX128+2A/+3)
[B]- I/O ... sort out is the dirty bus, which is certainly doable. -
Prototype case for original DivIDESomeone has posted some pictures of a prototype case which they have developed in perspex for the original DivIDE - it has a sliding top to allow acc…
... me photo (top view) ZX128+2A with connect power connector from ... (modified). See photos:
+2A with connect divide in plastic ... [/img]
+2A with [B]ZX-BUS PROTECTOR[/B] and divide ... -
Rom Cartridge - How does it work?So I've got me an IF2 and it has this ROM cartridge slot. How does it work? I read Paul Farrows site but one question remains unanswered. If I have o…
... a similar sort of resistor bus seperation, similar to the Sinclair ... and 128k, and the the +2A and +3 have all signals ... ULA. I also believe the +2A and +3 ULA implement a ... -
Switching peripherals on and offis there a way in which i can add a switch to switch off peripherals and switch another one on i.e. Multiface, DivIDE etc? Can i add it on the NMI o…
... , and what about a +3/+2A as they dont have a ... will be enough. As for +2A/+3 they have two ROMCS ... can also switch the complete bus between two peripherials.
