mostly things, but also some stuff https://sinensis.uninformed.xyz/ 2026-05-07T14:02:19+00:00 https://sinensis.uninformed.xyz/ https://sinensis.uninformed.xyz/_media/wiki:dokuwiki.svg text/html 2024-08-28T06:22:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:6502?rev=1724826164&do=diff MOS Technology 6502 Architecture The 6502 has only three general-purpose registers: A, X, and Y, all of which are 8 bits wide. It also has an eight-bit stack pointer (S) and an eight-bit status register (P). The stack is hardwired to page 1 (\$0100 text/html 2024-08-28T04:27:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:8080?rev=1724819232&do=diff Intel 8080 A massively popular and influential 8-bit microprocessor originally released in 1974. Among other uses, it powered the Altair 8800 and served as the basis for the Z80 and the LR35902. Architecture The 8080 has the following registers: 15...8 7...0 A text/html 2024-04-29T22:59:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:altair_8800?rev=1714431559&do=diff Altair 8800 A kit-based home computer originally released in 1975 and largely credited with sparking the home computer revolution. Hardware Front panel Much like mainframes and minicomputers of the time, its front panel featured a number of toggle switches for entering programs and examining memory. The data LEDs show the contents of the CPU's incoming data bus. These lines are pulled up on a memory write regardless of the data being written. Likewise, the address LEDs display the contents … text/html 2024-10-01T06:15:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:apple_ii?rev=1727763328&do=diff Apple ][ The bulk of this page will focus on the Enhanced IIe, both because it was the most popular of the line and because it is the model we have. Memory layout Despite the 6502's 64K address space, an Apple II could have significantly more RAM and ROM than that. The IIe came standard with 64K built into the motherboard, which could be doubled with an extended 80-column text card. Other peripheral cards tended to contain their own onboard RAM/ROM. All of this extra memory is accessible thro… text/html 2022-12-31T19:20:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:its?rev=1672514409&do=diff Incompatible Timesharing System History ITS was created by hackers dissatisfied with the directions taken by the Multics project. Originally implemented on the PDP-6, it spent much of its working life on the PDP-10. A central theme of ITS is openness of information: there are no file permissions or really restrictions of any kind. Anyone can (without logging in!) read and modify other users' files, spy on other terminals, update system documentation, patch the kernel, and halt the whole syste… text/html 2022-12-23T01:01:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:multics?rev=1671757297&do=diff Multics History Emulation Operation Links <https://multicians.org/> text/html 2023-01-08T07:41:22+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:pdp-10?rev=1673163682&do=diff PDP-10 Because of its prominent role in the early ARPANet and the influential operating systems developed for it, the PDP-10 remains an important fixture in hacker lore. Instruction set Conventions The PDP-10 is a word-oriented machine. All instructions are 36 bits, and all memory addresses refer to whole words. By convention, all numbers are octal unless followed by text/html 2024-09-07T16:59:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://sinensis.uninformed.xyz/histcomp:start?rev=1725728384&do=diff Historic computing Here I have collected information on computing technology of years past, with an eye toward emulation. I would like to eventually construct a terrarium/menagerie (working title) with a bunch of emulated machines, all available for remote access (for me only).