From 63167f223e1f54910f6b80e698390ee60aec79ee Mon Sep 17 00:00:00 2001
From: Benji Dial <Benji3.141@gmail.com>
Date: Tue, 11 Aug 2020 11:33:21 -0400
Subject: lots of progress

currently, BAR fields of IDE drives are all returning zero, and the ATA read function isn't working. i'm not sure why.
i'm going to work on VESA next, and come back to the IDE driver later
---
 doc/internal/gdt.txt |  7 +++++--
 doc/internal/mem.txt | 23 +++++++++++++++++------
 doc/internal/ple.txt | 12 ++++++++++++
 3 files changed, 34 insertions(+), 8 deletions(-)
 create mode 100644 doc/internal/ple.txt

(limited to 'doc/internal')

diff --git a/doc/internal/gdt.txt b/doc/internal/gdt.txt
index 0a8b5ea..26f7be9 100644
--- a/doc/internal/gdt.txt
+++ b/doc/internal/gdt.txt
@@ -1,2 +1,5 @@
-0x08: 0x0000.0000 - 0x0007.ffff (code)
-0x10: 0x0000.0000 - 0x000f.ffff (data)
\ No newline at end of file
+0x08: 0x0000.0000 - 0x0003.7fff (code)
+0x10: 0x0000.0000 - 0x1fff.ffff (data)
+0x18: task
+0x20: user code
+0x28: user data
\ No newline at end of file
diff --git a/doc/internal/mem.txt b/doc/internal/mem.txt
index d8b9913..0819fb7 100644
--- a/doc/internal/mem.txt
+++ b/doc/internal/mem.txt
@@ -1,6 +1,17 @@
-0x0001.0000 - 0x0001.ffff (64k): unused
-0x0002.0000 - 0x0002.7fff (32k): fat
-0x0002.8000 - 0x0002.bfff (16k): unused
-0x0002.c000 - 0x0002.ffff (16k): 32 file buffers
-0x0003.0000 - 0x0003.7fff (32k): kernel
-0x0003.8000 - 0x0003.ffff (32k): kernel stack
\ No newline at end of file
+0x0000.4000 - 0x0000.4003    (4): bootloader info
+  0x0 byte: support flags
+    0x80: PCI
+  0x1 byte: PCI "hardware characteristics"
+  0x2 byte: PCI minor
+  0x3 byte: PCI major
+  0x4 byte: last PCI bus
+
+0x0000.4200 - 0x0000.42ff  (256): VESA info
+0x0000.4300 - 0x0000.43ff  (256): VBE strings
+
+0x0001.0000 - 0x0001.1fff   (8k): memory map
+
+0x0003.0000 - 0x0003.7fff  (32k): kernel
+0x0003.8000 - 0x0003.ffff  (32k): kernel stack
+
+0x1000.0000 - 0x1fff.ffff (256M): dynamic memory
\ No newline at end of file
diff --git a/doc/internal/ple.txt b/doc/internal/ple.txt
new file mode 100644
index 0000000..1bcceb4
--- /dev/null
+++ b/doc/internal/ple.txt
@@ -0,0 +1,12 @@
+Portland Executable Format
+
+0x00  magic                dword  0xb9ba4c50
+0x04  minor version        word   0x0000
+0x06  major version        word   0x0000
+0x08  payload file offset  dword
+0x0c  payload length       dword
+0x10  bss length           dword
+0x14  virtual entry point  dword
+
+Payload loaded at start of cs=ds=ss.
+bss after payload, esp set to end of bss.
\ No newline at end of file
-- 
cgit v1.2.3