Delegate independent tasks to specialized agents working concurrently with isolated context.
295.4K 206.3K
View 
FPU Expert - K1810VM87 / Intel 8087
fpu-expert
Expert on K1810VM87 (Intel 8087) floating-point coprocessor for ES-1841. Provides guidance on FPU registers, data types, instructions, exception handling, and CPU-FPU synchronization.
SKILL.md
Full skill instructions
FPU Expert - K1810VM87 / Intel 8087
Expert knowledge for the ES-1841's optional math coprocessor.
Key Specifications
| Parameter | Value |
|---|---|
| Chip | K1810VM87 (Soviet 8087 clone) |
| Data Types | 16/32/64-bit integer, 32/64/80-bit float, 80-bit packed BCD |
| Registers | 8 × 80-bit stack (ST0-ST7) |
| Status | Control, Status, Tag words |
| I/O Ports | F0h-FFh (escape handler) |
| Exception | IRQ 13 (via INT 75h on AT, varies on XT) |
Register Stack
┌────────────────────────────────────────┐
│ ST(7) │ 80-bit extended precision │
├─────────┼──────────────────────────────┤
│ ST(6) │ │
├─────────┤ │
│ ST(5) │ │
├─────────┤ Register Stack │
│ ST(4) │ │
├─────────┤ │
│ ST(3) │ │
├─────────┤ │
│ ST(2) │ │
├─────────┤ │
│ ST(1) │ │
├─────────┼──────────────────────────────┤
│ ST(0) │ Top of Stack (TOS) │
└─────────┴──────────────────────────────┘
Data Formats
| Type | Bits | Range |
|---|---|---|
| Word Integer | 16 | -32768 to +32767 |
| Short Integer | 32 | -2×10⁹ to +2×10⁹ |
| Long Integer | 64 | -9×10¹⁸ to +9×10¹⁸ |
| Short Real | 32 | ±1.2×10⁻³⁸ to ±3.4×10³⁸ |
| Long Real | 64 | ±2.2×10⁻³⁰⁸ to ±1.8×10³⁰⁸ |
| Temp Real | 80 | ±3.4×10⁻⁴⁹³² to ±1.2×10⁴⁹³² |
| Packed BCD | 80 | 18 digits |
Key Instructions
| Category | Examples |
|---|---|
| Load/Store | FLD, FST, FSTP, FILD, FIST |
| Arithmetic | FADD, FSUB, FMUL, FDIV, FSQRT |
| Compare | FCOM, FCOMP, FTST |
| Transcendental | FSIN, FCOS, FPTAN, F2XM1, FYL2X |
| Control | FINIT, FWAIT, FSTCW, FLDCW |
CPU-FPU Synchronization
; FWAIT/WAIT required before reading FPU results
FLD QWORD [value]
FSQRT
FWAIT ; Wait for FPU to complete
FST QWORD [result]
Exception Handling
8087 exceptions:
- Invalid operation
- Denormalized operand
- Zero divide
- Overflow
- Underflow
- Precision (inexact)
ES-1841 Notes
- Optional coprocessor (not always installed)
- Software should detect presence before use
- AlphaDOS may not fully support FPU
References
See references/ for detailed documentation.
More Other skills
Other
brand-guidelines
Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.
179.7K 100.1K
View Other
theme-factory
Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.
179.7K 89.5K
View Other
internal-comms
A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal communications (status reports, leadership updates, 3P updates, company newsletters, FAQs, incident reports, project updates, etc.).
179.7K 76.1K
View Fundamental design principles for writing maintainable, testable Python code.
40.2K 21.9K
View 
Other
responsive-design
Modern responsive layouts using container queries, fluid typography, CSS Grid, and mobile-first strategies.
40.2K 20K
View Generate Playwright tests from scenarios using interactive browser exploration and validation.
39.7K 18.2K
View Automated website exploration and test case generation using Playwright.
39.7K 14.9K
View Modern React state management with Redux Toolkit, Zustand, Jotai, and React Query for every state category.
40.2K 14.7K
View Other
gdpr-data-handling
GDPR-compliant data handling with consent management, data subject rights, and privacy controls.
40.2K 14.3K
View Python error handling patterns including input validation, exception hierarchies, and partial failure handling. Use when implementing validation logic, designing exception strategies, handling batch processing failures, or building robust APIs.
40.2K 13.5K
View 
Other
refactor-plan
Detailed multi-file refactor planning with safety checks and rollback guidance.
39.7K 13K
View