ZX Interface 1: Difference between revisions
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[[ | The '''ZX Interface 1''' is a communications and storage interface for the ZX Spectrum released by [[Sinclair Research Ltd.|Sinclair Research]]. | ||
[[ | |||
It provided an RS-232 serial interface, as well as storage using Microdrives and networking capabilities through the [[Sinclair Network]], a proprietary interface of Sinclair's. The Sinclair Network would later be supported by MGT's [[DISCiPLE]] interface. | |||
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* TX Data is the value '''received''' by the serial port. | * ''TX Data'' is the value '''received''' by the serial port. | ||
* Net Input is the value read from the Sinclair Network port. | * ''Net Input'' is the value read from the Sinclair Network port. | ||
* Bit 0 of port 0x7f is output to the serial port if ''Comms Data'' is '''set''', or to the network port if ''Comms Data'' is '''reset'''. | * Bit 0 of port 0x7f is output to the serial port if ''Comms Data'' is '''set''', or to the network port if ''Comms Data'' is '''reset'''. | ||
* DTR signals that the remote station wishes to send data, CTS signals that the Spectrum wishes to send data | * ''DTR'' signals that the remote station wishes to send data, ''CTS'' signals that the Spectrum wishes to send data | ||
* Wait is used for network synchronisation. | * Wait is used for network synchronisation. | ||
* When Erase is '''reset''' the tape is erased and data is written, when '''set''' data is read. | * When ''Erase'' is '''reset''' the tape is erased and data is written, when '''set''' data is read. | ||
* R/W instructs the microdrive to read or write. When R/W is '''set''' the microdrive runs, when '''reset''' it stops | * ''R/W'' instructs the microdrive to read or write. When ''R/W'' is '''set''' the microdrive runs, when '''reset''' it stops | ||
* Comms Data is the value to be shifted into the microdrive select flip-flop chain. | * ''Comms Data'' is the value to be shifted into the microdrive select flip-flop chain. | ||
* Comms Clock shifts the microdrive select bit along the chain. | * ''Comms Clock'' shifts the microdrive select bit along the chain. | ||
* Write Protect is raised when a writeable cartridge is present in the selected microdrive. | * ''Write Protect'' is raised when a writeable cartridge is present in the selected microdrive. | ||
* Gap and Sync are used to locate the correct block of data on the microdrive. | * ''Gap'' and ''Sync'' are used to locate the correct block of data on the microdrive. | ||
== External links == | |||
* [[Wikipedia:ZX Interface 1|Wikipedia's article on the ZX Interface 1]] | |||
[[Category:Peripherals]] | |||
Revision as of 21:40, 3 May 2015
The ZX Interface 1 is a communications and storage interface for the ZX Spectrum released by Sinclair Research.
It provided an RS-232 serial interface, as well as storage using Microdrives and networking capabilities through the Sinclair Network, a proprietary interface of Sinclair's. The Sinclair Network would later be supported by MGT's DISCiPLE interface.
| Port | Bit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | ||
| 0xf7 | Read | TX Data | Net Input | ||||||
| Write | Net Output / RX Data | ||||||||
| 0xef | Read | Busy | DTR | Gap | Sync | Write Protect | |||
| Write | Wait | CTS | Erase | R/W | Comms Clock | Comms Data | |||
| 0xe7 | Read | Microdrive data read | |||||||
| Write | Microdrive data write | ||||||||
- TX Data is the value received by the serial port.
- Net Input is the value read from the Sinclair Network port.
- Bit 0 of port 0x7f is output to the serial port if Comms Data is set, or to the network port if Comms Data is reset.
- DTR signals that the remote station wishes to send data, CTS signals that the Spectrum wishes to send data
- Wait is used for network synchronisation.
- When Erase is reset the tape is erased and data is written, when set data is read.
- R/W instructs the microdrive to read or write. When R/W is set the microdrive runs, when reset it stops
- Comms Data is the value to be shifted into the microdrive select flip-flop chain.
- Comms Clock shifts the microdrive select bit along the chain.
- Write Protect is raised when a writeable cartridge is present in the selected microdrive.
- Gap and Sync are used to locate the correct block of data on the microdrive.