>> В x86 плавучка тоже расширение.
> Нет, и уже давно. Вряд ли ты сейчас вообще сможешь купить новый
> x86 процессор, в котором нет плавучки.

13 Processor Core
The Intel® Quark™ SE Microcontroller C1000 provides a single core x86 processor with
an 8kB Instruction Cache and Data Tightly Coupled Memory (TCM) Interface.

13.1 Features
Single Processor Core
Single Instruction 5-stage pipeline
32-bit Processor with 32-bit Data Bus
8 kB, 2- way Instruction L1 Cache
AHB-Lite FSB Interface
Data TCM Interface to Internal System SRAM
 Data Transfers for addresses matching the Internal System SRAM range will
appear on the Data TCM Interface and transfers to address outside this range
will appear on the AHB-Lite FSB Interface
Support for IA 32-bit with Pentium x86 ISA compatibility
Support for CPUID Instruction
Support for long NOP Instruction
Time Stamp Counter (TSC) accessed with the RDTSC instruction
Integrated Local APIC
Integrated IO APIC with support for 32 IRQs

Intel® Quark™ SE Microcontroller C1000
Datasheet
129

Note: The processor does not provide an x87 Floating Point Unit (FPU) and does not support
x87 FPU instructions.