pdp 8 - Size of the PDP-8 - Retrocomputing Stack Exchange
2018年3月7日 · The PDP-8/S, which arrived shortly after the original PDP-8, was in this category; however, because it used a serial arithmetic unit, it was slow and of limited popularity. The …
How did the PDP-8 handle strings? - Retrocomputing Stack …
2014年5月31日 · "The PDP-8's magnetic core memory required write after read since the read operation was destructive and zeroed the read memory location." Very true; I believe this was …
6502 - PDP-8 transistor count - Retrocomputing Stack Exchange
2018年3月2日 · The PDP-8 designers wanted memory reference instructions (MRI) like TAD to be able to address zero-page, indirect, current-page, and zero-page-indirect memory references, …
pdp 11 - Was the MC6800 based on the PDP-11 or PDP-8?
2024年2月4日 · The PDP-8 had only a single user-accessible register, AC, besides the program counter, and so all operations using more than one data value had to take the second value …
Arithmetic operations on multiple words on the PDP-8
2016年10月20日 · The PDP-8 designers clearly had some foresight. Notice that multi-word addition uses RAL to get the carry into the accumulator and clear the link bit. I can't see how …
PDP-8 conditional skip and 2-word instructions
2024年1月12日 · This answer is written from information sourced from PDP-8/E & PDP-8/M & PDP-8/F Maintenance Volume 1 (PDF warning). Here is a description of the datapath allowing …
Which PDP-8 boot process variations did exist?
2025年2月2日 · All the PDP-8 I know have magnetic core, and you can see in the OS/8 manual that the manual authors also made the assumption "it's magnetic core, and keeps the value". If …
In what way does the Straight-8 expand on the PDP-5?
2019年7月25日 · The PDP-5's instruction set was later expanded in its successor, the PDP-8, to handle more bit rotations and to increase the maximum memory size from 4K words to 32K …
pdp 8 - Does the PDP-8/E service an interrupt after any …
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 …
Newest 'pdp-8' Questions - Retrocomputing Stack Exchange
2024年1月12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 …