Cleaned up IRQ handling, added support for DL11 overrun errors, and fixed buffered message output (although a better solution is needed longer term)

apps/pdp11/boot/monitor/BOOTMON.mac

@@ -3,13 +3,17 @@
 ; REBASE HIGHER LINK/BOT:140000
 ; WANT PERFORMANCE COUNTER - CLOCK TICKS TO DO SOMETHING?
 
-PSW		=	177776
-DL11XCSR	=	177564
-DL11VEC		=	64
-
 KW11LKS		=	177546
 KW11VEC		=	100
 
+DL11RCSR	=	177560
+DL11RBUF	=	177562
+DL11XCSR	=	177564
+DL11XBUF	=	177566
+DL11VEC		=	64
+
+PSW		=	177776
+
 	.ASECT
 	.=140000
 START:	RESET
@@ -46,7 +50,7 @@ CLKAST:
 ONECHR:
 	TSTB	@#DL11XCSR
 	BPL	ONECHR
-	MOVB	R0,@#177566
+	MOVB	R0,@#DL11XBUF
 	RTS	PC
 
 PRTPTR:	.WORD 0
@@ -63,10 +67,10 @@ PRINT:
 PRTAST:
 	TSTB	@PRTPTR
 	BEQ	2$
-	MOVB	@PRTPTR,@#177566
+	MOVB	@PRTPTR,@#DL11XBUF
 	INC	PRTPTR
 	RTI
-2$:	CLRB	@#177564
+2$:	CLRB	@#DL11XCSR
 	RTI
 
 BUFFER:	.WORD	0			; INPUT BUFFER POINTER
@@ -77,12 +81,12 @@ INPUT:
 	CLR	LENGTH
 	MOV	#INPAST,@#60
 	MOV	#200,@#62
-	BISB	#100,@#177560
+	BISB	#100,@#DL11RCSR
 	RTS	PC
 
 INPAST:
 	MOV	R0,-(SP)
-	MOVB	@#177562,R0
+	MOVB	@#DL11RBUF,R0
 	CMPB	R0,#15
 	BEQ	7$			; CARRIAGE RETURN
 	CMPB	R0,#127.
@@ -132,7 +136,7 @@ CMD:
 	MOV	R4,-(SP)
 	MOV	#EOL,R0
 	JSR	PC,PRINT
-1$:	BITB	#100,@#177564
+1$:	BITB	#100,@#DL11XCSR
 	BNE	1$
 	CLR	R4
 	MOV	#CMDLST,R3		; CMD LIST