Command set target address page replaced by rewind target address

X16Community · Aug 25, 2024 · 4b0b78a · 4b0b78a
1 parent e5d1392
commit 4b0b78a
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Showing 3 changed files with 8 additions and 19 deletions.
diff --git a/README.md b/README.md
@@ -187,12 +187,9 @@ This command returns the bootloader version.
 
 Available since bootloader v3.
 
-## Command 0x84 = Set target address page (master write)
+## Command 0x84 = Rewind target address (master write)
 
-Sets the target address page that is used when reading from or writing
-to the SMC.
-
-The byte address is 64 * page.
+Rewinds the target address to 0.
 
 Available since bootloader v3.
 

diff --git a/command.inc b/command.inc
@@ -173,20 +173,12 @@ cmd_reboot_3:
 .endm
 
 ;******************************************************************************
-; Function...: CMD_SET_ADDR_PAGE
-; Description: Sets target address page. Byte address is page * 64.
-; In.........: r16 address page
+; Function...: CMD_REWIND_TARGET_ADDR
+; Description: Sets target address to 0
+; In.........: Nothing
 ; Out........: Nothing
-.macro CMD_SET_ADDR_PAGE
-    ; Move input to address register high byte (=> page * 256)
-    mov target_addrH, r16
-    clr target_addrL
-    
-    ; Divide by 4 to get byte address (=> page * 256 / 4 = page * 64)
-    lsr target_addrH
-    ror target_addrL
-    lsr target_addrH
-    ror target_addrL
+.macro CMD_REWIND_TARGET_ADDR
+    movw ZH:ZL, zeroH:zeroL
 .endm
 
 ;******************************************************************************

diff --git a/i2c.asm b/i2c.asm
@@ -178,7 +178,7 @@ i2c_receive2:
 i2c_receive3:
     cpi i2c_command, 0x84
     brne i2c_receive4
-    CMD_SET_ADDR_PAGE
+    CMD_REWIND_TARGET_ADDR
 
 i2c_receive4:
     clr i2c_command