Struct SystemConfiguration 

pub(crate) struct SystemConfiguration(Unsigned9Bit);

The SystemConfiguration value specifies a global state of the computer which determines how the Arithmetic Element (in modern wording, arithmetic unit) communicates with memory. The basic outline is given in Fig. 9 (page 20) of “A Functional Description of the Lincoln TX-2 Computer” by John M. Frankovitch and H. Philip Peterson. A more complete description (including the corresponding F-memory values) is given in tables 7-2 and 7-2A of the TX-2 User’s Handbook (pp 192-193 in my PDF copy).

The system configuration is a 9-bit value. While Frankovitch and Peterson describe most significant bit as being spare, table 7-2 appears to use it.

Figure 12-39 (“Configuration Block Diagram”) (page 250) in Volume 2 of the TX-2 Technical manual describes how a word from the CF memory (a QKIRcf value) is decoded into permutation, activity (which quarters are active) and fracture (which quarters are considered to be separate).

Tuple Fields

0: Unsigned9Bit

Implementations

impl SystemConfiguration

pub(crate) fn zero() -> SystemConfiguration

fn permutation(&self) -> Permutation

pub(crate) fn active_quarters(&self) -> QuarterActivity

Extract a QuarterActivity value from the activity field of a system configuration value.

Active quarters are signaled by a 0 in the appropriate bit position of the system configuration value. A 1 signals that the corresponding quarter is inactive.

The mapping between configuration values and which quarter is active is given in Table 12-4 in the technical manual (volume 2, page 12-22).

fn subword_form(&self) -> SubwordForm

Trait Implementations

impl Clone for SystemConfiguration

fn clone(&self) -> SystemConfiguration

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SystemConfiguration

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for SystemConfiguration

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<SystemConfiguration> for Unsigned9Bit

fn from(cfg: SystemConfiguration) -> Unsigned9Bit

Converts to this type from the input type.

impl From<Unsigned9Bit> for SystemConfiguration

fn from(n: Unsigned9Bit) -> SystemConfiguration

Converts to this type from the input type.

impl From<u8> for SystemConfiguration

fn from(n: u8) -> SystemConfiguration

Converts to this type from the input type.

impl Octal for SystemConfiguration

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for SystemConfiguration

fn eq(&self, other: &SystemConfiguration) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<u16> for SystemConfiguration

type Error = ConversionFailed

The type returned in the event of a conversion error.

fn try_from(n: u16) -> Result<SystemConfiguration, ConversionFailed>

Performs the conversion.

impl Copy for SystemConfiguration