rtc + pci: CMOS clock with date command, PCI bus enumeration

- rtc.rs: read the PC RTC via CMOS ports 0x70/0x71 (UIP wait, BCD/12h
  normalization, century sanity-check with 2000+ fallback); boot prints
  the wall clock, shell gains 'date'
- pci.rs: legacy config-space access (0xCF8/0xCFC) with full enumeration
  of buses 0-255; boot reports device count, shell gains 'pci' (lspci
  style listing with class names)
- QEMU q35 verified: Q35 host bridge, stdvga, e1000, ICH9 LPC

1 files changed, 4 insertions, 0 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index 0074969..8ee7f6c 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -96,6 +96,8 @@ Single Rust crate (`x86_64-unknown-uefi` target).  Module breakdown:
   allocator), bitmap page allocator
 - `paging.rs` — identity page-table helpers (map/unmap/query, large-page split)
 - `power.rs` — `ResetSystem`-based shutdown, hlt loop fallback
+- `rtc.rs` — CMOS/RTC clock (ports 0x70/0x71), BCD/12h normalization
+- `pci.rs` — legacy PCI config space (0xCF8/0xCFC), full enumeration
 - `gop.rs` — framebuffer access and text rendering
 - `font.rs` — 8×16 bitmap font data
 - `ps2.rs` — PS/2 keyboard driver (polling)
@@ -120,6 +122,8 @@ Single Rust crate (`x86_64-unknown-uefi` target).  Module breakdown:
 ✅ **Shell** — `mmap` dumps the UEFI map, `stress` exercises alloc/free + growth
 ✅ **Poweroff** — `poweroff`/`exit` shut down via UEFI `ResetSystem`
   (ACPI S5; `halt` keeps the plain hlt loop)
+✅ **RTC** — CMOS clock read at boot and via `date` (BCD/12h handled)
+✅ **PCI** — port-based config access, full bus enumeration via `pci`
 
 ## Target audience