# HG changeset patch
# User Mike Pavone <pavone@retrodev.com>
# Date 1367709808 25200
# Node ID 021aeb6df19bde16723287179f2b552740c9f6a9
# Parent  ed7098f717d73f2859b505c1afc1b8179ca976c3
Implement HALT (sort of tested)

diff -r ed7098f717d7 -r 021aeb6df19b z80_to_x86.c
--- a/z80_to_x86.c	Sat May 04 15:58:15 2013 -0700
+++ b/z80_to_x86.c	Sat May 04 16:23:28 2013 -0700
@@ -35,6 +35,7 @@
 void z80_retrans_stub();
 void z80_io_read();
 void z80_io_write();
+void z80_halt();
 
 uint8_t z80_size(z80inst * inst)
 {
@@ -898,7 +899,13 @@
 			dst = zcycles(dst, 4 * inst->immed);
 		}
 		break;
-	//case Z80_HALT:
+	case Z80_HALT:
+		dst = zcycles(dst, 4);
+		dst = mov_ir(dst, address, SCRATCH1, SZ_W);
+		uint8_t * call_inst = dst;
+		dst = call(dst, (uint8_t *)z80_halt);
+		dst = jmp(dst, call_inst);
+		break;
 	case Z80_DI:
 		dst = zcycles(dst, 4);
 		dst = mov_irdisp8(dst, 0, CONTEXT, offsetof(z80_context, iff1), SZ_B);
diff -r ed7098f717d7 -r 021aeb6df19b zruntime.S
--- a/zruntime.S	Sat May 04 15:58:15 2013 -0700
+++ b/zruntime.S	Sat May 04 16:23:28 2013 -0700
@@ -71,6 +71,17 @@
 zskip_sync:
 	ret
 
+	.global z80_halt
+z80_halt:
+	mov %edi, %r14d
+	sub %ebp, %r14d
+	and $0xFFFFFFFC, %r14d
+	add %r14d, %ebp
+	cmp %edi, %ebp
+	jnb z80_handle_cycle_limit_int
+	add $4, %ebp
+	jmp z80_handle_cycle_limit_int
+
 	.global z80_read_byte
 z80_read_byte:
 	call z_inccycles