bootromfun: okay, speicherzugriffe haben definitiv bei mein fpga ned [...]

[calu.git] / 2_isa / src / bootrom.s

diff --git a/2_isa/src/bootrom.s b/2_isa/src/bootrom.s
index 3f596c5ca0d54c69307bf6853b7f7a8d5eef2f14..9ff1bf77d26158c56366cccb50566fb1be858a76 100644 (file)
--- a/2_isa/src/bootrom.s
+++ b/2_isa/src/bootrom.s
@@ -158,3 +158,12 @@ bt_J:
        brr r0
 
 tehend:
+       xor r1, r1, r1
+       ldi r1, 0x41 ; 'A'
+       call send_byte
+       xor r1, r1, r1
+       ldi r1, 0x42 ; 'B'
+       call send_byte
+       xor r1, r1, r1
+       ldi r1, 0x43 ; 'C'
+       call send_byte