From e1a4f3fbaa19be6e6cc694ff1b116a94bbc47148 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sat, 24 May 2025 08:23:28 +0200
Subject: [PATCH] Forgot the dell_jumper.c.

---
 src/device/dell_jumper.c | 175 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 src/device/dell_jumper.c

diff --git a/src/device/dell_jumper.c b/src/device/dell_jumper.c
new file mode 100644
index 000000000..12fc3d13b
--- /dev/null
+++ b/src/device/dell_jumper.c
@@ -0,0 +1,175 @@
+/*
+ * 86Box    A hypervisor and IBM PC system emulator that specializes in
+ *          running old operating systems and software designed for IBM
+ *          PC systems and compatibles from 1981 through fairly recent
+ *          system designs based on the PCI bus.
+ *
+ *          This file is part of the 86Box distribution.
+ *
+ *          Implementation of the Dell 486 and 586 Jumper Readout.
+ *
+ *          Register 0x02:
+ *              - Bit 0: ATX power: 1 = off, 0 = on.
+ *
+ *          Register 0x05:
+ *              - Appears to be: 0x02 = On-board audio enabled;
+ *                               0x07 = On-board audio disabled.
+ *
+ *          Register 0x07:
+ *              - Bit 0: On-board NIC: 1 = present, 0 = absent;
+ *              - Bit 1: On-board audio: 1 = present, 0 = absent;
+ *              - Bits 4-2:
+ *                  - 0, 0, 0 = GXL;
+ *                  - 0, 0, 1 = GL+;
+ *                  - 0, 1, 0 = GXMT;
+ *                  - 0, 1, 1 = GMT+;
+ *                  - 1, 0, 0 = GXM;
+ *                  - 1, 0, 1 = GM+;
+ *                  - 1, 1, 0 = WS;
+ *                  - 1, 1, 1 = GWS+.
+ *
+ * Authors: Miran Grca, <mgrca8@gmail.com>
+ *
+ *          Copyright 2025 Miran Grca.
+ */
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#define HAVE_STDARG_H
+#include <86box/86box.h>
+#include "cpu.h"
+#include <86box/timer.h>
+#include <86box/io.h>
+#include <86box/device.h>
+#include <86box/machine.h>
+#include <86box/sound.h>
+#include <86box/chipset.h>
+#include <86box/plat.h>
+#include <86box/plat_unused.h>
+
+typedef struct dell_jumper_t {
+    uint8_t index;
+    uint8_t regs[256];
+} dell_jumper_t;
+
+#ifdef ENABLE_DELL_JUMPER_LOG
+int dell_jumper_do_log = ENABLE_DELL_JUMPER_LOG;
+
+static void
+dell_jumper_log(const char *fmt, ...)
+{
+    va_list ap;
+
+    if (dell_jumper_do_log) {
+        va_start(ap, fmt);
+        pclog_ex(fmt, ap);
+        va_end(ap);
+    }
+}
+#else
+#    define dell_jumper_log(fmt, ...)
+#endif
+
+static void
+dell_jumper_write(uint16_t addr, uint8_t val, void *priv)
+{
+    dell_jumper_t *dev = (dell_jumper_t *) priv;
+
+    dell_jumper_log("Dell Jumper: Write %02x\n", val);
+
+    if (addr & 1)  switch (dev->index) {
+        default:
+            dev->regs[dev->index] = val;
+            break;
+        case 0x02:
+            dev->regs[dev->index] = val;
+            if (val & 0x04)
+                /* Soft power off. */
+                plat_power_off();
+            break;
+        case 0x05:
+            dev->regs[dev->index] = (dev->regs[dev->index] & 0x02) | (val & 0xfd);
+            if (machine_snd != NULL)  switch (val & 0x05) {
+                default:
+                case 0x05:
+                    sb_vibra16s_onboard_relocate_base(0x0000, machine_snd);
+                    break;
+                case 0x00:
+                    sb_vibra16s_onboard_relocate_base(0x0220, machine_snd);
+                    break;
+            }
+            break;
+        case 0x07:
+            break;
+    } else
+        dev->index = val;
+}
+
+static uint8_t
+dell_jumper_read(uint16_t addr, void *priv)
+{
+    const dell_jumper_t *dev = (dell_jumper_t *) priv;
+    uint8_t                  ret = 0xff;
+
+    dell_jumper_log("Dell Jumper: Read %02x\n", dev->jumper);
+
+    if (addr & 1)
+        ret = dev->regs[dev->index];
+    else
+        ret = dev->index;
+
+    return ret;
+}
+
+static void
+dell_jumper_reset(void *priv)
+{
+    dell_jumper_t *dev = (dell_jumper_t *) priv;
+
+    dev->index = 0x00;
+    memset(dev->regs, 0x00, 256);
+
+    if (sound_card_current[0] == SOUND_INTERNAL)
+        /* GXL, on-board audio present, on-board NIC absent. */
+        dev->regs[0x07] = 0x02;
+    else
+        /* GXL, on-board audio absent, on-board NIC absent. */
+        dev->regs[0x07] = 0x00;
+}
+
+static void
+dell_jumper_close(void *priv)
+{
+    dell_jumper_t *dev = (dell_jumper_t *) priv;
+
+    free(dev);
+}
+
+static void *
+dell_jumper_init(const device_t *info)
+{
+    dell_jumper_t *dev = (dell_jumper_t *) calloc(1, sizeof(dell_jumper_t));
+
+    dell_jumper_reset(dev);
+
+    io_sethandler(0x00e8, 0x0002, dell_jumper_read, NULL, NULL, dell_jumper_write, NULL, NULL, dev);
+
+    return dev;
+}
+
+const device_t dell_jumper_device = {
+    .name          = "Dell Jumper Readout",
+    .internal_name = "dell_jumper",
+    .flags         = 0,
+    .local         = 0,
+    .init          = dell_jumper_init,
+    .close         = dell_jumper_close,
+    .reset         = dell_jumper_reset,
+    .available     = NULL,
+    .speed_changed = NULL,
+    .force_redraw  = NULL,
+    .config        = NULL
+};