updated readme and minor changes in pmm

2 files changed, 31 insertions, 2 deletions

diff --git a/README.md b/README.md
index 4b2ba90..b7a8ce5 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Welcome to FoolOS
 Disclaimer
 ----------
 
+THIS IS WORK IN PROGRESS.
+
 This is a simple and useless "operating system", with very basic 
 features, sorry. It is the fruit of my fundamental explorations of 
 the 32-bit protected mode, interrupt handling, memory management and 
@@ -21,6 +23,18 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
+Issues
+------
+
+* memory map may be larger than mbr, but  0x0000 is used to check for end.
+* memory map location is hardcoded
+* ~4 first 4mb of physical mem are reserved by mem manager (hardcoded)
+* bootloader loads only 15sectors of kernel into mem. ~7KB?
+* Makefile is hardcoded and contains mistakes too!
+* size of bitmap to track free blocks of physical memory is hardcoded to max.
+* physical memory manager allocator naively implemented.
+
+
 
 MY NOTES BELOW THIS LINE
 ========================
diff --git a/kernel/mem.c b/kernel/mem.c
index e1253b1..a0a6277 100644
--- a/kernel/mem.c
+++ b/kernel/mem.c
@@ -132,6 +132,22 @@ void pmmngr_free_block (void* p) {
  
 }
 
+/*
+void mem_test_3()
+{
+	uint32_t *addr;
+
+	addr=pmmngr_alloc_block();
+	scr_put_string("alloc 1: ");
+	scr_put_hex32(addr);
+	scr_put_string_nl("");
+
+	addr=pmmngr_alloc_block();
+	scr_put_string("alloc 2: ");
+	scr_put_hex32(addr);
+	scr_put_string_nl("");
+}
+
 void mem_test_2()
 {
     //crossing 512MB boundary! 
@@ -186,6 +202,7 @@ void mem_test(int start, int end, int steps)
 	scr_put_string_nl("");
     }
 }
+*/
 
 void mem_init(uint16_t *memmap)
 {
@@ -239,7 +256,5 @@ void mem_init(uint16_t *memmap)
     scr_put_string_nl("");
 
 
-
-
 }