finish setcur subroutine

README.md

@@ -15,6 +15,7 @@ The following example programs exist in the folder ./src
 
 - `HELLO.ASM`: A simple "Hello World" program, that uses the print screen
   routine, calling BDOS.
+- `DIVTEST.ASM`: Tests the division function on the machine.
 - `GRAPHTST.ASM`: Tests simple escape sequences, such as clearing the screen.
 - `CIRCLE.ASM`: Draws a circle on the screen, by printing the escape sequences
   on the screen.

src/GRAPHTST.ASM

@@ -64,9 +64,50 @@ DIV2:   RAL              ; rotate left
 		RAR              ; rotate the A register.
 		RET              ; return to the caller
 ; SETCUR: Places the cursor anywhere on the screen. 
-;         Coordinates are stored in a memory location that
-;         is referred to by HL
-; Start of the main code block
+;         Expects 2 16-bit values on the stack.
+;         Writes a longer sequence. It first creates an ESC 
+;         at CurPos, then executes it, by printing.
+SETCUR: LXI H, CurPos    ; load the start address into HL
+		LXI A, 1B        ; load the A register, with the ESC-char
+		MOV M, A         ; store the value in A to CurPos
+		INX H            ; increase HL to store at the next address
+		LXI A, 5B        ; store the '['-char in A
+		MOV M, A         
+		INX H
+		POP B            ; read the x-pos into BC
+		LXI D 000A       ; load the divisor into DE
+		CALL DIV         ; devide the number by 10
+		MOV A, C         ; load the quotient into A
+		ADI 30           ; make the pos a char
+		MOV M, A         ; store the char
+		INX H            ; increase HL to store the next address
+		MOV A, B         ; get the remainder, and do the same again
+		ADI 30           ; make the int a char
+		MOV M, A         ; store the char
+		INX H            ; increase HL
+		LXI A, 3B        ; load the ';' sign
+		MOV M, A         ; store the char
+		INX H            ; increase HL
+		POP B            ; get the next value from the stack
+		LXI D, 000A      ; load the divisor into DE
+		CALL DIV         ; call the division subroutine
+		MOV A, C         ; load the quotient into A
+		ADI 30           ; make the position a char
+		MOV M, A         ; store the char
+		INX H            ; increase the accumulator
+		MOV A, B         ; load the remainde to A
+		ADI 30           ; make it a char
+		MOV M, A         ; store the char
+		INX H            ; increase the HL register
+		LXI A, 48        ; Load the 'H' character 
+		MOV M, A         ; store the character
+		INX H            ; increase HL
+		LXI A, 00        ; all strings are NULL terminated
+		MOV M, A         ; store the NULL
+		LXI H, CurPos    ; reset HL
+		CALL PRINTF      ; print the ESC-sequence
+		RET
+ Start of the main code block
 START:  LXI H, 0         ; blank out HL
 		DAD SP           ; HL = SP
 		SHLD Stack       ; save the original stack
@@ -74,6 +115,11 @@ START:  LXI H, 0         ; blank out HL
 		SPHL             ; set SP to point to our new stack
 		CALL CLS         ; clear the screen
 		CALL HOME        ; place cursor in the top left
+		LXI B 0028       ; set vertical pos to 40
+		PUSH B           ; store the values on the stack
+		LXI B 000A       ; set horizontal Pos to 10
+		PUSH B           ; store on the stack
+		CALL SETCUR      ; set the cursor position
 		LXI H, MsgStr    ; load the string addr into HL
 		CALL PRINTF      ; call our self defined print routine
 		LHLD Stack       ; load original stack addr into HL