Try long test

sw/bios/boot2.s

@@ -68,9 +68,9 @@ _start:
         ldx #>ptr1
         jsr _SD_readSingleBlock
 
-        lda #<fatbuf
-        ldx #>fatbuf
-        jsr _SD_printBuf
+        ; lda #<fatbuf
+        ; ldx #>fatbuf
+        ; jsr _SD_printBuf
 
         lda #$20       ; Start at first directory entry (first is a disk label)
         sta ptr3
@@ -187,9 +187,9 @@ _start:
         ldx #>ptr1
         jsr _SD_readSingleBlock
 
-        lda userptr
-        ldx userptr + 1
-        jsr _SD_printBuf
+        ; lda userptr
+        ; ldx userptr + 1
+        ; jsr _SD_printBuf
 
         dec filesiz
         bmi @doneload

sw/bios/bootloader.s

@@ -71,9 +71,9 @@ _main:
         ldx #>ptr1
         jsr _SD_readSingleBlock
 
-        lda #<buf
-        ldx #>buf
-        jsr _SD_printBuf
+        ; lda #<buf
+        ; ldx #>buf
+        ; jsr _SD_printBuf
 
 
         lda #$20       ; Start at first directory entry (first is a disk label)

sw/bios/main.c

@@ -33,8 +33,12 @@ int main() {
 
         res[0] = SD_readSingleBlock(addr, buf, &token);
         // if no error, print buffer
-        if((res[0] == 0x00) && (token == SD_START_TOKEN))
+        if((res[0] == 0x00) && (token == SD_START_TOKEN)) {
+#ifndef RTL_SIM
             SD_printBuf(buf);
+#endif
+        }
+
         //else if error token received, print
         else if(!(token & 0xF0))
         {