X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;ds=sidebyside;f=2_isa%2Fsrc%2Fbootrom.s;h=d38e1854527f517791893b82811e21e057a93780;hb=e342529c0374b6173bd50f346c088fc7e5eccfdc;hp=2a46cfdabb8a38f695b8c955cbfce4607153b502;hpb=61ccae8df4f138fd753bd1e5e7e8b8f25159d969;p=calu.git

diff --git a/2_isa/src/bootrom.s b/2_isa/src/bootrom.s
index 2a46cfd..d38e185 100644
--- a/2_isa/src/bootrom.s
+++ b/2_isa/src/bootrom.s
@@ -25,15 +25,11 @@ main:
 	ldi r11, PBASE@lo
 	ldih r11, PBASE@hi
 poll:
-	ldw r3, UART_STATUS(r10)
-	andx r3, UART_RECV_NEW
-	brzs+ poll; branch if zero
-
 	call recv_byte
 	; we received the enter bootrom sign
 	xor r1, r1, r1
 	cmpi r0, 0x48 ; 'H'
-	breq- bt_H
+	breq+ bt_H
 	br poll ; else
 
 ;-----
@@ -41,7 +37,7 @@ send_byte:
 	ldw r3, UART_STATUS(r10)
 	andx r3, UART_TRANS_EMPTY
 	brnz+ send_byte ; branch if not zero
-	stb r1, UART_TRANS(r10)
+	stw r1, UART_TRANS(r10)
 	ret
 
 ;-----
@@ -62,7 +58,7 @@ recv_byte:
 	andx r3, UART_RECV_NEW
 	brzs+ recv_byte; branch if zero
 	xor r0, r0, r0
-	ldb r0, UART_RECV(r10)
+	ldw r0, UART_RECV(r10)
 	ret
 
 ;-----
@@ -89,6 +85,8 @@ recv_word:
 ;-----
 bootrom:
 	call recv_byte
+	ldi r1, 0x50 ; 'P'
+	call send_byte
 	br tehend
 
 	xor r1, r1, r1