"It is first appropriate to briefly describe the Apollo Guidance Computer (AGC). This processor is a general purpose, sequential, digital machine. Its word length
is 16 bits including parity. The random access memory consists of 2048 words of
destructive, read-write memory, called erasable, and 36,864 words of non- destructive read-only memory called fixed memory. The memor’y cycle time (MCT) is slightly less than 12 microseconds, with two MCI’s required to execute an add
and four MCTs to execute a multiply. As is typical of real-time control computers, this machine has a set of special input-output channels with which it controls the
spacecraft and observes the state of its environment. The interrupt structure consists of ten program interrupts with associated priorities, which are used for program
control transfers. In addition, twenty-six counter interrupts with associated priorities allow for input-output servicing. The instruction set consists of forty-two
regular instructions and nine involuntary instructions. Figure 1 indicates the number and diversity of systems with which the AGC interacts"
http://www.ibiblio.org/apollo/hrst/archive/1678.pdf
"It is first appropriate to briefly describe the Apollo Guidance Computer (AGC). This processor is a general purpose, sequential, digital machine. Its word length is 16 bits including parity. The random access memory consists of 2048 words of destructive, read-write memory, called erasable, and 36,864 words of non- destructive read-only memory called fixed memory. The memor’y cycle time (MCT) is slightly less than 12 microseconds, with two MCI’s required to execute an add and four MCTs to execute a multiply. As is typical of real-time control computers, this machine has a set of special input-output channels with which it controls the spacecraft and observes the state of its environment. The interrupt structure consists of ten program interrupts with associated priorities, which are used for program control transfers. In addition, twenty-six counter interrupts with associated priorities allow for input-output servicing. The instruction set consists of forty-two regular instructions and nine involuntary instructions. Figure 1 indicates the number and diversity of systems with which the AGC interacts"
EDIT: Apparently, as of six or so hours ago, Notch has implemented cutting-edge 1970s technology ( http://dcpu.com/highnerd/dcpu16_1_3.txt ). :)