nx_nishi_usb_fbkernel.nx

nx_nishi_usb_fbkernel.nx -- x86 ladder R9-FBKERNEL: the disk-loaded kernel DRAWS its own framebuffer. Closes the seam nx_nishi_usb_desktop honestly flagged: there the desktop was drawn by the NishiLang nx_fb driver AFTER the emu returned. HERE the booted kernel's framebuffer write is REAL x86 INSTRUCTIONS executed on the emu: the kernel that the MBR loads off the persisted image, after it reaches LONG mode, runs an authored fill loop (mov-imm / store [rax],rcx / add / cmp / jne) that writes a computed value into every framebuffer word. Afterward we read the framebuffer straight out of the emu's memory -- the pixels were written by x86 the booted kernel executed, not by a NishiLang call -- and encode it to BMP via nx_fb (now ONLY the encoder). This fuses THREE proven emus into ONE: the 16-bit real-mode + INT 13h loader (nx_nishi_usb_image), the CR0/EFER mode transition (nx_nishi_usb_longmode), and the 64-bit store/arith/loop engine (nx_nishios_fb_x86's ek_emu). 16-bit ops use named regs; 64-bit ops use a reg[] file; the boot phases (banner -> mode-switch -> fill) each init their own registers, so there is no aliasing. Boot flow, executed off the PERSISTED on-disk bytes: sector 0 (MBR) --INT 13h--> loads sector 1 (kernel) to 0x8000, jmps to it sector 1 (kernel) prints "NishiOS" (INT 10h) -> CR0.PE/EFER.LME/CR0.PG (LONG mode) -> x86 fill loop writes the framebuffer at 0x9000 -> HLT KAT: (T1) booted off disk; (T2) reached LONG mode; (T3) banner; (T4) the framebuffer holds EXACTLY what the x86 loop computed at word 1 / 200 / last (proves the booted kernel's x86 ran to completion); (T5) BMP exported. NEG/liar-kill (T6): a 0-sector-load sibling never runs the kernel, so the framebuffer stays ZERO and long mode is never reached -- the pixels exist ONLY because the disk-loaded kernel executed. HONEST SCOPE: the loop fills a computed ramp = proof of per-pixel x86 writes by the booted kernel; richer chrome (rects/text drawn purely in x86) + a real VESA/GOP framebuffer on hardware are the continuation. NEVER-BRICK (Rule 26): writes FILE artifacts; models INT 13h *reads* only; no /dev. expect_exit: 0 license_tier: ORIGINAL