The processor was also re-implemented using TTL components, further increasing the performance of the system.

In 1973, the KA10 was replaced by the KI10, which used TTL SSI.

A smaller, less expensive model, the KS10, was introduced in 1978, using TTL and Am2901 bit-slice components and including the PDP-11 Unibus to connect peripherals.

It was their only 18-bit machine constructed from TTL integrated circuits rather than discrete transistors, and had an optional integrated vector graphics terminal.

The first implementation was the TS1, a central processing unit built from discrete transistor-transistor logic ( 74F TTL ) devices.

An older common TTL value for DNS was 86400 seconds, which is 24 hours.

A TTL value of 86400 would mean that, if a DNS record was changed on the authoritative nameserver, DNS servers around the world could still be showing the old value from their cache for up to 24 hours after the change.

The ZX80 was designed around readily available TTL chips ; the only proprietary technology was the firmware.

TTL was invented in 1961 by James L. Buie of TRW, " particularly suited to the newly developing integrated circuit design technology ", and it was originally named transistor-coupled transistor logic ( TCTL ).

The Kenbak-1, ancestor to the first personal computers, used TTL for its CPU instead of a microprocessor chip, which was not available in 1971.

Standardization of the TTL levels was so ubiquitous that complex circuit boards often contained TTL chips made by many different manufacturers selected for availability and cost, compatibility being assured ; two circuit board units off the same assembly line on different successive days or weeks might have a different mix of brands of chips in the same positions on the board ; repair was possible with chips manufactured years ( sometimes over a decade ) later than original components.

While it contains no microprocessor, it used the 4004 programming instruction set and its custom TTL was the basis for the Intel 8008, and for practical purposes the system behaves approximately as if it contains an 8008.

As the chip was delayed and did not meet CTC's performance goals, the 2200 ended up using CTC's own TTL based CPU instead.

An external TTL register was often used for sequential designs such as state machines.

When the GLC was abolished in 1986, its housing assets and the remaining undeveloped land was vested in a non-profit organisation Thamesmead Town Limited ( TTL ).

TTL was a private company with an unusual form of governance.

In 2000, TTL was wound down and two new organisations were created.

However, the foundation that made National successful was its expertise in analogue electronics, TTL ( transistor – transistor logic ) and MOSFET ( metal-oxide-semiconductor field-effect transistor ) integrated circuit technologies.

Transistor-transistor logic ( TTL ) then supplanted DTL with the observation that one transistor could do the job of two diodes even more quickly, using only half the space.

If the TTL field reaches zero before the datagram arrives at its destination, then the datagram is discarded and an ICMP error datagram ( 11-Time Exceeded ) is sent back to the sender.

A rare form of advergaming, TTL advergames involve the use of URL hyperlinks within the game designed to induce the player to visit a webpage which then contains BTL advertisements.

Another more advanced method is to attach a TTL to the modem's RS-232 adapter, and get access to the modem's console directly to make it download new firmware, which can then be configured via a simple web interface.

* The TTL field of IPv4 has been renamed to Hop Limit, reflecting the fact that routers are no longer expected to compute the time a packet has spent in a queue.

Unlike the TTL connectors used in the early days of home computing and game consoles ( most notably the DE-9 connector originally found on the Atari VCS, which was the de facto standard on other systems ) the game port is analog rather than digital, relying on some form of analog-to-digital converter ( ADC ) to interpret joystick movements.

Atari ended up designing their own version for production, which contained about 100 TTL chips.

Taiwan Beer ( 台灣啤酒, Táiwān Píjǐu, or 台啤, TáiPí ) is brewed by the Taiwan Tobacco and Liquor Corporation ( TTL, 台灣菸酒公司 Táiwān Yānjiǔ Gōngsī ).

Its successor, the Taiwan Tobacco and Liquor Corporation ( TTL, 台灣菸酒公司 Táiwān Yānjiǔ Gōngsī ), is a publicly owned company that competes in the marketplace.

* Taiwan Tobacco and Liquor Corporation ( TTL )-Official Site

The time for which a resolver caches a DNS response is determined by a value called the time to live ( TTL ) associated with every record.

The TTL is set by the administrator of the DNS server handing out the authoritative response.

As a noteworthy consequence of this distributed and caching architecture, changes to DNS records do not propagate throughout the network immediately, but require all caches to expire and refresh after the TTL.

RFC 1912 conveys basic rules for determining appropriate TTL values.

Some resolvers may override TTL values, as the protocol supports caching for up to 68 years or no caching at all.

The value of the MINIMUM field of the SOA record and the TTL of the SOA itself is used to establish the TTL for the negative answer.

For example, every device ( such as an intermediate router ) forwarding an IP datagram first decrements the time to live ( TTL ) field in the IP header by one.

If the resulting TTL is 0, the packet is discarded and an ICMP Time To Live exceeded in transit message is sent to the datagram's source address.

The tracert ( traceroute ), Pathping commands are implemented by transmitting UDP datagrams with specially set IP TTL header fields, and looking for ICMP Time to live exceeded in transit ( above ) and " Destination unreachable " messages generated in response.

Therefore, IPv6 routers do not need to recompute a checksum when header fields ( such as the time to live ( TTL ) or hop count ) change.

For small-scale logic, designers now use prefabricated logic gates from families of devices such as the TTL 7400 series by Texas Instruments and the CMOS 4000 series by RCA, and their more recent descendants.

Initially a 32-bit TTL processor in conjunction with supporting microcode implemented the programmer-visible architecture.

* an 8-bit TTL ( time to live ) field.

Later systems ( the PDP-8 / I and / L, the PDP-8 / E, / F, and / M, and the PDP-8 / A ) returned to a faster, fully parallel implementation but used much less-expensive TTL MSI logic.

They are activated by AC control signals or DC control signals from Programmable logic controller ( PLCs ), PCs, Transistor-transistor logic ( TTL ) sources, or other microprocessor and microcontroller controls.

Determining the intermediate routers traversed involves adjusting the time-to-live ( TTL ), aka hop limit, Internet Protocol parameter.

Frequently starting with a value like 128 ( Windows ) or 64 ( Linux ), routers decrement this and discard a packet when the TTL value has reached zero, returning the ICMP error message ICMP Time Exceeded.