fixed incorrect vram address

docs/spec/README.md

@@ -15,6 +15,7 @@ To read the full specification as a list read the [`specs` document](spec.md)
 		- [Instruction set](#instruction-set)
 			- [Assembly](#assembly)
 	- [Memory](#memory)
+		- [Character display memory](#character-display-memory)
 	- [Audio](#audio)
 	- [Input](#input)
 
@@ -84,10 +85,10 @@ Lychee Assembly, the custom assembly dialect. This version include some syntax s
 Lychee uses memory-mapped memory and I/O. This means all that the ROM, Work RAM, Character display memory and I/O all live under the same memory address range.
 
 Lychee uses a 16 bit address bus, thus 65536 possible address locations. This is then split between the different parts of the machine.
-1. ($0000-$8000) 32 kb: ROM
-2. ($8001-$9680) 5760 bytes: Character display memory
-3. ($9681-$9780) 255 bytes: Flags & I/O
-4. ($9781-$9999) 536 bytes: Reserved stack ram
+1. ($0000-$7FFF) 32 kb: ROM
+2. ($8000-$967F) 5760 bytes: Character display memory
+3. ($9680-$977F) 255 bytes: Flags & I/O
+4. ($9780-$9999) 538 bytes: Reserved stack ram
 5. ($A000 - $FFFF) 24 kb: Work RAM
 
 ### Character display memory

examples/asm/loopchars.asm

@@ -10,14 +10,14 @@ jp Z &color # if all chars done then jump to color
 jp &increment # else loop
 color:
 # load color into vram
-ld a $02
+ld a $01
 ld l a
 ld a b
 inc a # increment color
 ld b a
 ld (hl) a
 # load initial char
-ld a $01
+ld a $00
 ld l a
 ld a $32
 ld (hl) a

examples/asm/loopcharsbasic.asm

@@ -1,10 +1,10 @@
 ld a $80
 ld h a
-ld a $02
+ld a $01
 ld l a
 ld a $07
 ld (hl) a
-ld a $01
+ld a $00
 ld l a
 ld a $19
 ld (hl) a

examples/asm/loopcharsscreen.asm

@@ -4,7 +4,7 @@ ld a $07
 ld e a
 ld a $80
 ld h a
-ld a $01
+ld a $00
 ld l a
 increment:
 ld a $32

examples/asm/timertest.asm

@@ -2,12 +2,12 @@ setup:
 # Load color
 ld a $80
 ld h a
-ld a $02
+ld a $01
 ld l a
 ld a $08
 ld (hl) a
 # Load initial char
-ld a $01
+ld a $00
 ld l a
 ld a $30
 ld (hl) a

src/lycheepkg/emulator.nim

@@ -2,7 +2,7 @@ import strutils, system, std/[bitops]
 
 const mem_size: int = 24576 # 24kb
 const vmem_size: int = 5760 # 5.6kb
-const mem_offset*: int = 0x8001
+const mem_offset*: int = 0x8000
 const ram_size*: int = 64 * 1024
 
 const workmem_start: int = 0xA000