Table of Content  Branch Up  

Anatomy

The Console consists of the following sections:

# Entry Section:
The Entry Section allows to enter data directly into memory from the Entry Switches, in binary. This section consists of the sexteen Entry Switches and the buttons: LOAD, DEPOSIT, EXAM+ and EXAM-.

# Address Display (A-DISP):
Sixteen lamps reading from the address bus.

# Data Display (D-DISP):
Sixteen lamps reading from memory or internal registers (selectable).

# Status Display (S-DISP):
Nineteen lamps displaying different status signals such as the flags register content.

# Data Selector (D-SEL):
Ten push buttons for selecting the D-DISP source. This can be memory or any of the CPU internal registers: A, B, C, D, E, PC, SP, OR, IR.

# Machine Control:
These buttons and switch establish the operational mode of the machine. Buttons in this section are: HALT, START, CONT. The switch is: STEP.

# Interrupt Control:
These toggle switches allow to enable or disable the timer (TMR), external interrupts (INT) and to make the computer to halt automatically when a fault condition is reached (HOF).

# Others:
There is also a RESET button and a Panel Lock toggle switch.

For all control switches on the Console, the active position is "up", the inactive position is "down". For instance, you defeat external interrupts by putting the INT switch to its down position.

For Entry Switches, the "up" position is binary one (1), the "down" position is binary zero (0).

All buttons are momentary actuating, meaning that the associated action will take place immediately after pressing the button and won't be affected by how long you keep the button depressed nor by the moment in wish you release it.