From 16f586b65e0c55d0ae27ddc6aec09cb5ceb8dedd Mon Sep 17 00:00:00 2001
From: Giles Atkinson <“gatk555@gmail.com”>
Date: Wed, 26 Jan 2022 19:07:12 +0000
Subject: [PATCH] Respect the "tstart" parameter when saving event node data
 (XSPICE). Fixes Support Request #47: "XSpice memory usage (TRAN TSTART
 effect)".

---
 src/xspice/evt/evtaccept.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/xspice/evt/evtaccept.c b/src/xspice/evt/evtaccept.c
index b3226efdb..1d031d7ed 100644
--- a/src/xspice/evt/evtaccept.c
+++ b/src/xspice/evt/evtaccept.c
@@ -164,7 +164,14 @@ void EVTaccept(
         /* Reset the modified flag */
         node_data->modified[index] = MIF_FALSE;
 
-        if (node_table[index]->save) {
+        /* Optionally store node values for later examination.
+         * The test of CKTtime here is copied from dctran.c.
+         * CKTinitTime is from the tstart parameter of the "tran"
+         * command or card.
+         */
+
+        if (node_table[index]->save && ckt->CKTtime >= ckt->CKTinitTime &&
+            (ckt->CKTtime > 0 || !(ckt->CKTmode & MODEUIC))) {
             /* Update last_step for this index */
             node_data->last_step[index] = node_data->tail[index];
         } else {