+ // check ISR state debug
+ if (ibmpc_isr_debug) {
+ xprintf("\nISR:%04X\n", ibmpc_isr_debug);
+ ibmpc_isr_debug = 0;
+ }
+
+ // check protocol AT/XT
+ if (ibmpc_protocol != current_protocol) {
+ xprintf("\nPROTO:%02X\n", ibmpc_protocol);
+ current_protocol = ibmpc_protocol;
+ }
+