Cool! Anyways, it turns out I need help real quick with my game. (lol). I figure I might as well post the entire code so far to show you. The problem is that I can't seem to move my character up. I am using a variable called Ypos for the Y position of the character in the penCol. He doesn't move at all. Also, I am using Mimas for this, if that helps any.

....
Start:
BCALL ClrLCDFull
LD HL,$02
LD (curRow),HL
LD HL,Str1 ; This is my ASCII Adventures string
BCALL PutS
LD HL,$231E
LD (penCol),HL
LD HL,Str2 ; This is my Version 1.0 string
BCALL VPutS
LD HL,$2D1B
LD (penCol),HL
LD HL,Str3 ; This is my Press any key string
BCALL VPutS
BCALL GetKey ; I would have used GetCSC for this, but that would have required a loop and I want to optimize as much as possible
Game:
BCALL ClrLCDFull
LD A,Xpos ; This gets my variable Xpos.
LD (penRow),A ; This makes it in the penRow
LD A,Ypos
LD (penCol),A
LD HL,Plyr ; This is my Theta string ( I know I could use a character, I just wanted a string.....)
KeyLoop:
BCALL GetCSC
CP 0
JR Z, KeyLoop ; I know. Super n00b way of doing things, but it works.
CP skClear
RET Z
CP skUp
JR Z, MoveUp ; It's in this routine that I'm having trouble with things.
MoveUp:
LD A, Ypos
Sub 1
LD (Ypos),A
JR Game ; Don't know if this is the problem or not
Str1:
DB "ASCII Adventures",0
Str2:
DB "Version 0.1",0
Str3:
DB "Press any key",0
Plyr:
DB "(theta)",0
Xpos EQU 46 ; These could be the problems too
Ypos EQU 26

Thanks for all your help!

Okay thanks! I'll try that....

Try replacing the last two lines:

Xpos:
 .db 46 ; These could be the problems too
Ypos:
 .db 26
 
EQU turned Xpos and Ypos into constants.  DB will help with making them variables.

Also, check this part here:
Game:
BCALL ClrLCDFull
LD A,Xpos ; This gets my variable Xpos.
LD (penRow),A ; This makes it in the penRow
LD A,Ypos
LD (penCol),ATwo things, first: penRow is the row, aka the y position. penCol is the X position. Next, you forgot the parenthesis again. It works initially because you have them defined as equates, so it essentially converts Xpos into the number equated as Xpos. Try making the change Hot_dog proposed (changing the equates into .db statements) and adding in the parenthesis.

Just saying it in other words: In ASM there are no named variables, only registers (very limited set) and memory locations. But there are compiler "variables" like labels and defines. But those only exist before compile time in your code. By doing "Ypos = 26", you define the memory location 26 to a compiler variable named Ypos.

Hardware thinking in ASM!