TODO: StaffRoll Draw() investigations

[Alex4386]

The Original Author programmed this as static 16fps, (since I don't really know about PC9801's internal rendering logic, I can't)

Current Plans

there still is a todo: ventralize image and figure out the actual timing of some if statements,
which might help if we have a reverse engineered it. (will check ReC98 Repository, later on)
(I hope my assembly skills got better while taking Linux Reverse Engineering classes (Bad news, I learned it with Intel flavored one)

Reverse Engineering Trials

Self-Reverse Engineering Trials failed,
Ollydbg doesn't work. ( might because of my machine is 64bit ) .
Ghidra framework by NSA with i386 real-mode settings, that didn't work either.
DOSBox failed because it is for generic ones not specific to NEC PC-9801.

[Alex4386]

update: I don't have IDA Pro, :(
Trying to read the assembly for now

[Alex4386]

Reverse Engineering MegaThread

Finding Entrypoint:

https://stackoverflow.com/questions/3715618/how-does-dos-load-a-program-into-memory

References and Investigation Purpose:

MS-DOS Repository

Touhou Project Series is expected to run on MS-DOS 3.0+, is it ok to check it as references?
Microsoft/MS-DOS

IMAGE_DOS_HEADER

https://docs.microsoft.com/en-us/windows/desktop/debug/pe-format#ms-dos-stub-image-only