SEPAKBOLACC: Advanced Slot Hp777

SEPAKBOLACC Although 256 words of memory seems extraordinarily small by contemporary standards, when "toggling in" programs by hand it seemed quite adequate. Once a complete program had been "toggled in" using this method, the "HALT" condition could be removed using another switch and the microprocessor would look for an address at which to start executing the program in the last two words of the address space. This was a sensible approach at a time when, for example, 16K x 1 bit dynamic memory chips cost £7 each and 8 chips plus a significant amount of support logic were required to build a memory card.|Using Slot Dimensioning