refactor & fixed assembler path handling

2025-06-21 04:05:22 +01:00
parent 42c26d4184
commit 528ceddade
17 changed files with 447 additions and 184 deletions
@@ -0,0 +1,67 @@
+// lib:
+// print.dsa
+
+// usage:
+//
+// include print "<relative path>""
+//      
+// usage for print:
+//      push (register containing address of string)
+//      push pcx
+//      jmp print::print
+//
+// usage for reset:
+//      push pcx
+//      jmp print::reset
+
+dw display: 0x20000
+dw current: 0x20000
+
+// prints the given text to the screen.
+print:
+    push bpr
+    mov spr, bpr
+
+    ldw bpr, rg0, 8
+    ldw current, rg1
+
+print_loop:
+	ldb rg0, acc
+	stb acc, rg1
+
+	addi rg0, 1
+	addi rg1, 1
+
+    cmp acc, zero
+	jne print_loop
+    jmp end
+
+// return
+end:
+    stw rg1, current
+	
+    mov bpr, spr
+    pop bpr
+    return
+
+// resets the cursor position on the screen
+reset:
+    push bpr
+    mov spr, bpr
+    ldw display, rg1
+    jmp end
+
+clear:
+    push bpr
+    mov spr, bpr
+    // display size = 2000 bytes / 500 words
+    lli 500 rg0
+    ldw display, rg1
+
+clear_loop:
+    dec rg0
+    stw zero, rg1
+    addi rg1, 4
+    cmp rg0, zero
+    jgt clear_loop
+    jmp end