impl of screen ghosting

terranmon.txt

@@ -21,14 +21,14 @@ User area: 8 MB, hardware area: 8 MB
 1024 kB
     Peripheral #7
 ...
-1024 kB
+1024 kB  (where Peripheral #0 would be)
     MMIO and Interrupt Vectors
     128 kB
         MMIO for Peri #8
     128 kB
         MMIO for Peri #7
     ...
-    128 kB
+    128 kB  (where Peripheral #0 would be)
         MMIO for the computer
         130816 bytes
             MMIO for Ports, etc.
@@ -40,6 +40,7 @@ User area: 8 MB, hardware area: 8 MB
 IO Device
 
 Endianness: little
+Note: Always takes up the peripheral slot of zero
 
 MMIO
 
@@ -54,6 +55,8 @@ MMIO
     close it. Keyboard buffer will be cleared whenever request is received, so
     MAKE SURE YOU REQUEST THE KEY INPUT ONLY ONCE!
 
+64..67 RO: User area memory size in bytes
+
 
 --------------------------------------------------------------------------------
 
@@ -102,25 +105,25 @@ FI
 
 MMIO
 
-2 bytes RO
+0..1 RO
     Framebuffer width in pixels
-2 bytes RO
+2..3 RO
     Framebuffer height in pixels
-1 bytes RO
+4 RO
     Text mode columns
-1 bytes RO
+5 RO
     Text mode rows
-1 bytes RW
+6 RW
     Text-mode attributes
     0b kkkk 00rc (k: currently using character rom, r: TTY Raw mode, c: Cursor blink)
-1 bytes RW
+7 RW
     Graphics-mode attributes
     0b 0000 000g (g: Use sprites(wipes out text buffer))
-1 bytes RO
+8 RO
     Last used colour (set by poking at the framebuffer)
-1 bytes RW
+9 RW
     current TTY foreground colour (useful for print() function)
-1 bytes RW
+10 RW
     current TTY background colour (useful for print() function)
 
 Text-mode-font-ROM is immutable and does not belong to VRAM