From c244998a2e95f693877b1132b6d4ba68d2d5712e Mon Sep 17 00:00:00 2001
From: Thiago Auler dos Santos <thiagoauler@gmail.com>
Date: Tue, 28 Nov 2017 01:10:57 -0200
Subject: [PATCH] more memory implementation

---
 src/memory.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/src/memory.c b/src/memory.c
index 75781e3..fc524f0 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -14,7 +14,7 @@
  |   RAM   | 
  |         |
  |         |
- | 0FFF    |
+ | 7FFF    |
  + - - - - +
  |         |
  
@@ -33,7 +33,7 @@
 
  */
   
-db ram_memory[4096];  // total memory: 4KB
+db ram_memory[32 * 1024];  // total memory: 32KB
 
 db keyboard_buffer;   // 0xD010
 db keyboard_control;  // 0xD011
@@ -42,23 +42,23 @@ db display_control;   // 0xD013
 
 db read_byte(dw address)
 {
-    if (address >= 0x0000 && address <= 0x0FFF)
+    if (address >= 0x0000 && address <= 0x7FFF)
     {
-        // 4KB memory RAM
+        // 32KB memory RAM
         return ram_memory[address];
     }
-    else if (address == 0xD010)
+    else if (address == 0xD010 || address == 0xD0F0)
     {
         // when reading from keyboard buffer,
         // its status control is disabled again
         keyboard_control = 0x00;
         return keyboard_buffer;
     }
-    else if (address == 0xD011)
+    else if (address == 0xD011 || address == 0xD0F1)
     {
         return keyboard_control;
     }
-    else if (address == 0xD012)
+    else if (address == 0xD012 || address == 0xD0F2)
     {
         return display_buffer;
     }
@@ -99,12 +99,12 @@ dw read_word(dw address)
 
 void write_mem(dw address, db data)
 {
-    if (address >= 0x0000 && address <= 0x0FFF)
+    if (address >= 0x0000 && address <= 0x7FFF)
     {
-        // 4KB memory RAM
+        // 32KB memory RAM
         ram_memory[address] = data;
     }
-    else if (address == 0xD012)
+    else if (address == 0xD012 || address == 0xD0F2)
     {
         display_buffer = data;
     }