2014年5月31日 · The PDP-8 was a popular 12-bit minicomputer of the late sixties. It used word addressing, so that it always dealt in 12-bit words, of which it could address 4096 with a full …

2018年3月7日 · The PDP-8 Models and Options FAQ is worth reading for this kind of information. It gives sizes for the base models (mostly 19" wide as mentioned by Wilson; the exception is …

2018年3月2日 · The PDP-8 was a 12-bit computer with a deliberately simple instruction set. At first glance, 12 is greater than 8, so might be expected to be larger than the early 8-bit …

2024年1月12日 · PDP-8 heavily relied on conditional skips: instructions that under some circumstances would skip the following instruction. Among them are, for example: ISZ …

2016年10月20日 · The PDP-8 system cleverly used this characteristic in two places: The Increment and Skip of Zero (ISZ) instruction would read, increment, and re-write a value one …

2016年10月20日 · The dynamic load is 8 to 11 cycles per word of precision, depending on indirection. The PDP-8 programmers I worked with at DEC felt this arrangement of operations …

There's a general boot process for PDP-8, described in many documents at bitsavers.org. That includes first manually entering RIM bootloader through a control panel, running it to load BIN …

2024年2月4日 · According to Gordon Bell, the 6800 was based on the PDP-11. According to Chuck Peddle, it was a PDP-8. Can anyone with knowledge of the PDP's pass judgement?

2024年1月12日 · The possibility of faulty or malicious code freezing the machine was common in those days, even for machines much more complicated than the PDP-8. Except for the rare …

2024年1月10日 · It's much less sophisticated than the VAX formats, but it's considerably earlier, and the PDP-8 was a very simple machine. It's fairly typical for early 1960s formats, and …