Commit Diff

Commit:
aa10ea0fbd7e99568897e47d0396839b45e8b18c
From:
Sven M. Hallberg <pesco@khjk.org>
Date:
Message:
test writing to A in a jump instruction An instruction such as A=0;JMP should branch to the address active at the start of the clock cycle rather than the new value of A which does not update until the next cycle.
Actions:
Patch | Tree
commit - 5c25183eee499db2e6d43608b70a853650e91381
commit + aa10ea0fbd7e99568897e47d0396839b45e8b18c
blob - 64351d9b25df70f863b5384491982b952458d081
blob + 26042cc3083a517e72af98385884ed1343d7b766
--- Makefile
+++ Makefile
@@ -1,7 +1,7 @@
 CFLAGS += -Wall
 
 PROGS = hackem rom
-ROMS = add.rom max.rom term0.rom term1.rom term2.rom hello.rom atoi.rom
+ROMS = add.rom max.rom term0.rom term1.rom term2.rom dest.rom hello.rom atoi.rom
 
 .PHONY: all test clean
 all: ${PROGS} ${ROMS}
blob - /dev/null
blob + ff6041636ec5612f960b702afa2604868bbbfca4 (mode 644)
--- /dev/null
+++ dest.hack
@@ -0,0 +1,10 @@
+			# writing to A in a jump does not affect the destination
+0 000000000000110 	# 0: @Y
+1 11 0 110000 010 000 	# 1: D=A;
+0 000000000000101	# 2: @X
+1 11 0 001100 100 111	# 3: A=D;JMP	// should go to X (5) with A=D=Y (6)
+1 11 0 101010 100 000	# 4: A=0;	// not reached (infinite loop)
+			# 5: (X)
+1 11 0 101010 010 000	#    D=0;
+			# 6: (Y)	// only reached with A=6 D=0
+1 11 0 101010 000 111	#    0;JMP	// terminates
blob - /dev/null
blob + c69443edc234b5d184d216c0d37e01f80363627b (mode 644)
--- /dev/null
+++ dest.tsv
@@ -0,0 +1,7 @@
+T	PC	instr.	A	D	R0/SP	R1/LCL	R2/ARG	R3/THIS	R4/THAT
+0	0	000006	0	0	0	0	0	0	0
+1	1	166020	6	0	0	0	0	0	0
+2	2	000005	6	6	0	0	0	0	0
+3	3	161447	5	6	0	0	0	0	0
+4	5	165220	6	6	0	0	0	0	0
+5	6	165207	6	0	0	0	0	0	0