Did the Harris 80C286 differ from Intel's 80286 in its behaviour?
2020年11月7日 · Does the Harris 80C286 have any difference in behaviour from an Intel 80286 as far as the programmer is concerned? The Harris/Intersil/Renesas 80C286 is, like its 80C86 …
80286 pricing and availability - Retrocomputing Stack Exchange
2018年7月9日 · The 80286 isn't that much harder, and of similar complexity to the 68020 which was a very popular choice for homebrewers. I'd pick the 80386 as the last mainstream …
Is a Heatsink Needed for an Intel 80286? - Retrocomputing Stack …
2017年12月26日 · The 80286 has a maximum power dissipation of 3.3W and an operating range of up to 70°C. Unless you want to operate near that point, no heat sink is needed. The ICs …
Instructions added with the Intel 80286 - Retrocomputing Stack …
2020年9月6日 · The 80286 processor added these instructions: ARPL, VERR, VERW, LAR, LSL, SMSW, SGDT, SIDT, SLDT, STR, LMSW, LGDT, LIDT, LLDT, LTR, CLTS. To help …
How is FSTSW AX implemented on the 80286/80287?
2022年7月16日 · /NPS1, NPS2 - Numeric Processor Select - essentially the Chip Select signals for the 80286; CMD0, CMD1 - Command 0/1 - essentially Port/Register address lines of the …
intel - 80286 can switch from real mode to protected mode - but …
Intel assured that the 80286 was compatible with existing legacy real mode programs, but looked towards MS DOS and saw XENIX, UNIX, etc, and realized that some sort of hardware …
80286 - 0F1h opcode-prefix on i80286 - Retrocomputing Stack …
2019年8月12日 · On Intel iAPX 80286, as I recall from experience, the undocumented – officially unassigned – opcode position 0F1h was actually decoded as an instruction prefix, thus …
What is the simplest UNIX system with a MMU?
2021年12月29日 · Another example is the Unix-like QUNIX (later renamed QNX) which was released for the Intel 8088 in 1982. Wikipedia: “in the late 1990s QNX released a demo image …
First 80286 Based Computer - Retrocomputing Stack Exchange
2018年4月19日 · The 80286 was released in early 1982. The IBM PC AT, which used it, was released in late 1984. Two and a half years is a long time to design a new computer that is a …
What's the heritage of 80286? - Retrocomputing Stack Exchange
2021年2月19日 · 80186 introduced some instructions for HLL features. 80286 introduced some instructions for protected mode, and provided some multitasking ability with external MMU …