Michael Petch

Michael Petch has asked 13 questions and find answers to 342 problems.

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About

Software engineer and software architect. I can be reached at [email protected].

Michael Petch questions

When #GP is raised from v8086 mode does the processor push an error code on the ring0 stack?
Why would one avoid using POPF to restore Interrupt Flag state?
What do the constraints "Rah" and "Ral" mean in extended inline assembly?
Solution needed for building a static IDT and GDT at assemble/compile/link time
Understanding Inline assembly in a pre-processor macro vs Inline assembly in a function
GCC code that seems to break inline assembly rules but an expert believes otherwise
Problem switching to v8086 mode from 32-bit protected mode by setting EFLAGS.VM to 1
Near call/jump tables don't always work in a bootloader
Should using MOV instruction to set SS to 0x0000 cause fault #GP(0) in 64-bit mode?
Legacy BIOS bootloader to bootstrap real-mode code in second stage

Michael Petch answers

When #GP is raised from v8086 mode does the processor push an error code on the ring0 stack?
Broken CPUID brand string?
Why would one avoid using POPF to restore Interrupt Flag state?
What does `000000q` mean?
IBM 5150 - int 21h corrupts segment registers
Cannot load my OS kernel
Use serial-console as display, but computer keyboard for standard-input
FileNotFoundError: [Errno 2] [duplicate]
x86-64 Kernel crashing on setting up the IDT
MASM: dereference struct pointer twice?