From 347b9ee67f25e7ccb2e24721db5c97ed97a3a096 Mon Sep 17 00:00:00 2001
From: Mario Fetka <mario.fetka@gmail.com>
Date: Sat, 23 May 2026 17:14:56 +0200
Subject: [PATCH] tests

---
 kern_wasm.asm |  1 +
 nwtests.c     | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/kern_wasm.asm b/kern_wasm.asm
index 6811abf..e1771ef 100644
--- a/kern_wasm.asm
+++ b/kern_wasm.asm
@@ -21,6 +21,7 @@ public  _IPXlisten
 public  _xmemmove
 public  _Net_Call
 public  _C32_LoadNios_Probe
+public  _C32_Call_ESI_Probe
 public  _Net_Call_VLM_Raw
 
 _IPXinit proc far
diff --git a/nwtests.c b/nwtests.c
index bd004e5..70bc5c1 100644
--- a/nwtests.c
+++ b/nwtests.c
@@ -1182,6 +1182,43 @@ static int tests_c32type(void)
 }
 
 
+static int tests_c32values(void)
+{
+  uint8 out[32];
+  uint16 ax, bx, cx, dx, si, dsreg, esreg;
+  uint32 esi, ecx;
+
+  memset(out, 0, sizeof(out));
+  C32_LoadNios_Probe(0xD8C1, out);
+
+  ax    = tests_get_word_lh(out + 0);
+  esi   = tests_get_dword_lh2(out + 2);
+  ecx   = tests_get_dword_lh2(out + 6);
+  bx    = tests_get_word_lh(out + 10);
+  cx    = tests_get_word_lh(out + 12);
+  dx    = tests_get_word_lh(out + 14);
+  si    = tests_get_word_lh(out + 16);
+  dsreg = tests_get_word_lh(out + 18);
+  esreg = tests_get_word_lh(out + 20);
+
+  fprintf(stdout, "TEST C32VALUES\n");
+  fprintf(stdout, "AX=%04X ESI=%08lX ECX=%08lX\n", ax, esi, ecx);
+  fprintf(stdout, "BX=%04X CX=%04X DX=%04X SI=%04X DS=%04X ES=%04X\n",
+          bx, cx, dx, si, dsreg, esreg);
+
+  fprintf(stdout, "\nPointer interpretation:\n");
+  fprintf(stdout, "ESI as seg:off = %04lX:%04lX\n",
+          (esi >> 16) & 0xffff, esi & 0xffff);
+  fprintf(stdout, "ECX as seg:off = %04lX:%04lX\n",
+          (ecx >> 16) & 0xffff, ecx & 0xffff);
+  fprintf(stdout, "16-bit regs suggest entry offsets: SI=%04X DX=%04X CX=%04X\n",
+          si, dx, cx);
+
+  fprintf(stdout, "\nNext build will call C32BEGINUSE using these pointers.\n");
+  return(0);
+}
+
+
 int func_tests(int argc, char *argv[], int mode)
 {
   if (argc >= 2) {
@@ -1194,6 +1231,9 @@ int func_tests(int argc, char *argv[], int mode)
     if (tests_same_arg(argv[1], "C32TYPE"))
       return tests_c32type();
 
+    if (tests_same_arg(argv[1], "C32VALUES"))
+      return tests_c32values();
+
     if (tests_same_arg(argv[1], "NWREQ87"))
       return tests_nwreq87(argc, argv);