From: Toni Wilen <twilen@winuae.net>
Date: Sat, 5 Jan 2019 13:36:26 +0000 (+0200)
Subject: Pacific Peripherals/IVS Overdrive SCSI controller.
X-Git-Tag: 4200~94
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=e7aebbcde8c0f3b2e14d6b3ea55af198c6435857;p=francis%2Fwinuae.git

Pacific Peripherals/IVS Overdrive SCSI controller.
---

diff --git a/expansion.cpp b/expansion.cpp
index 8065d0a1..c29bdfdb 100644
--- a/expansion.cpp
+++ b/expansion.cpp
@@ -5158,6 +5158,15 @@ const struct expansionromtype expansionroms[] = {
 		false, 0, NULL,
 		{ 0xc1, 1, 0x00, 0x00, 0x07, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
 	},
+	{
+		_T("pacificoverdrive"), _T("Overdrive"), _T("Pacific Peripherals/IVS"),
+		NULL, overdrive_init, NULL, overdrive_add_scsi_unit, ROMTYPE_OVERDRIVE, 0, 0, BOARD_AUTOCONFIG_Z2, true,
+		NULL, 0,
+		true, EXPANSIONTYPE_SCSI,
+		0, 0, 0, false, NULL,
+		false, 0, NULL,
+		{ 0xd1, 16, 0x00, 0x00, 0x08, 0x40, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00 }
+	},
 	{
 		_T("fastlane"), _T("Fastlane"), _T("Phase 5"),
 		NULL, ncr_fastlane_autoconfig_init, NULL, fastlane_add_scsi_unit, ROMTYPE_FASTLANE, 0, 0, BOARD_AUTOCONFIG_Z3, false,
diff --git a/include/rommgr.h b/include/rommgr.h
index de240d3a..ed54078a 100644
--- a/include/rommgr.h
+++ b/include/rommgr.h
@@ -179,6 +179,7 @@ extern int decode_cloanto_rom_do (uae_u8 *mem, int size, int real_size);
 #define ROMTYPE_SBISA		0x00100075
 #define ROMTYPE_X86MOUSE	0x00100076
 #define ROMTYPE_ACCESSX		0x00100077
+#define ROMTYPE_OVERDRIVE	0x00100078
 
 #define ROMTYPE_NOT			0x00800000
 #define ROMTYPE_QUAD		0x01000000
diff --git a/include/scsi.h b/include/scsi.h
index ee6e842e..75029c70 100644
--- a/include/scsi.h
+++ b/include/scsi.h
@@ -299,6 +299,9 @@ void profex_add_scsi_unit(int ch, struct uaedev_config_info *ci, struct romconfi
 bool fasttrak_init(struct autoconfig_info *aci);
 void fasttrak_add_scsi_unit(int ch, struct uaedev_config_info *ci, struct romconfig *rc);
 
+bool overdrive_init(struct autoconfig_info *aci);
+void overdrive_add_scsi_unit(int ch, struct uaedev_config_info *ci, struct romconfig *rc);
+
 uae_u8 idescsi_scsi_get(uaecptr addr);
 void idescsi_scsi_put(uaecptr addr, uae_u8 v);
 
diff --git a/rommgr.cpp b/rommgr.cpp
index c68853c6..4d2a1365 100644
--- a/rommgr.cpp
+++ b/rommgr.cpp
@@ -608,6 +608,10 @@ static struct romdata roms[] = {
 	0x039a14a7, 0x1a710b94, 0xcc1bd217, 0xb0c310af, 0x4b0f6d0a, 0x1125b05a, NULL, NULL },
 	{ _T("AccessX 500 v2.1 (descrambled)"), 2, 1, 2, 1, _T("ACCESSX\0"), 32768, 243, 0, 0, ROMTYPE_ACCESSX, 0, 0, NULL,
 	0x415a5cae, 0x15c8c15f, 0x3700e867, 0xd1dbe2ee, 0xcbb7c7cd, 0x245555fa, NULL, NULL },
+	{ _T("Pacific Peripherals Overdrive v1.5"), 1, 5, 1, 5, _T("OVERDRIVE\0"), 8192, 246, 0, 0, ROMTYPE_OVERDRIVE, 0, 0, NULL,
+	0x086e2716b, 0x075b50cb,0x166e00ac,0x4016ef7f,0x02532e86,0xe73b7711, NULL, NULL },
+	{ _T("Pacific Peripherals Overdrive v2.0"), 2, 0, 2, 0, _T("OVERDRIVE\0"), 8192, 247, 0, 0, ROMTYPE_OVERDRIVE, 0, 0, NULL,
+	0xebe42aa6, 0xdff761c2,0x429d0d26,0x2151d831,0x12746f83,0x3b8d36f0, NULL, NULL },
 
 	{ _T("CyberStorm MK I 68040"), 0, 0, 0, 0, _T("CSMKI\0"), 32768, 95, 0, 0, ROMTYPE_CB_CSMK1, 0, 0, NULL,
 	  0, 0, 0, 0, 0, 0, NULL, _T("cyberstormmk1_040.rom") },
diff --git a/scsi.cpp b/scsi.cpp
index 51e6a4e7..033a306e 100644
--- a/scsi.cpp
+++ b/scsi.cpp
@@ -74,7 +74,8 @@
 #define OMTI_PROFEX 39
 #define NCR5380_FASTTRAK 40
 #define NCR5380_12GAUGE 41
-#define NCR_LAST 42
+#define NCR5380_OVERDRIVE 42
+#define NCR_LAST 43
 
 extern int log_scsiemu;
 
@@ -1492,6 +1493,22 @@ static void xebec_do_dma(struct soft_scsi *ncr)
 	}
 }
 
+static void overdrive_do_dma(struct soft_scsi *ncr)
+{
+	struct raw_scsi *rs = &ncr->rscsi;
+	while ((rs->bus_phase == SCSI_SIGNAL_PHASE_DATA_OUT || rs->bus_phase == SCSI_SIGNAL_PHASE_DATA_IN) && ncr->dmac_length > 0) {
+		if (rs->bus_phase == SCSI_SIGNAL_PHASE_DATA_IN) {
+			x_put_byte(ncr->dmac_address, ncr5380_bget(ncr, 8));
+			ncr->dmac_address++;
+			ncr->dmac_length--;
+		} else if (rs->bus_phase == SCSI_SIGNAL_PHASE_DATA_OUT) {
+			ncr5380_bput(ncr, 8, x_get_byte(ncr->dmac_address));
+			ncr->dmac_address++;
+			ncr->dmac_length--;
+		}
+	}
+}
+
 
 static void dma_check(struct soft_scsi *ncr)
 {
@@ -1520,6 +1537,12 @@ static void dma_check(struct soft_scsi *ncr)
 
 		}
 
+		if (ncr->type == NCR5380_OVERDRIVE) {
+
+			overdrive_do_dma(ncr);
+
+		}
+
 		ncr->dmac_active = 0;
 	}
 }
@@ -2710,6 +2733,21 @@ static int twelvegauge_reg(struct soft_scsi *ncr, uaecptr addr)
 	return (addr >> 4) & 7;
 }
 
+static int overdrive_reg(struct soft_scsi *ncr, uaecptr addr)
+{
+	if (addr & 0x8000)
+		return -1;
+	if ((addr & 0x7000) == 0x4000)
+		return 0x100 + (addr & 0x3f);
+	if (addr & 1)
+		return -1;
+	if ((addr & 0x7000) == 0x2000)
+		return (addr >> 1) & 7;
+	if ((addr & 0x7000) == 0x6000)
+		return 8;
+	return -1;
+}
+
 static uae_u8 read_684xx_dma(struct soft_scsi *ncr, uaecptr addr)
 {
 	uae_u8 val = 0;
@@ -2744,6 +2782,7 @@ static void write_684xx_dma(struct soft_scsi *ncr, uaecptr addr, uae_u8 val)
 		break;
 		case 7:
 		ncr->dmac_active = (val & 0x80) != 0;
+		dma_check(ncr);
 		break;
 		case 10: // MTCR
 		ncr->dmac_length &= 0x000000ff;
@@ -3416,10 +3455,22 @@ static uae_u32 ncr80_bget2(struct soft_scsi *ncr, uaecptr addr, int size)
 		reg = twelvegauge_reg(ncr, addr);
 		if (reg >= 0) {
 			v = ncr5380_bget(ncr, reg);
-	} else {
+		} else {
 			v = ncr->rom[addr & 0x7fff];
 		}
 
+	} else if (ncr->type == NCR5380_OVERDRIVE) {
+
+		reg = overdrive_reg(ncr, addr);
+		if (reg >= 0) {
+			if (reg >= 0x100)
+				v = read_684xx_dma(ncr, reg);
+			else
+				v = ncr5380_bget(ncr, reg);
+		} else {
+			v = ncr->rom[addr & 0x3fff];
+		}
+
 	}
 
 #if NCR5380_DEBUG > 1
@@ -3821,6 +3872,16 @@ static void ncr80_bput2(struct soft_scsi *ncr, uaecptr addr, uae_u32 val, int si
 		reg = twelvegauge_reg(ncr, addr);
 		if (reg >= 0)
 			ncr5380_bput(ncr, reg, val);
+
+	} else if (ncr->type == NCR5380_OVERDRIVE) {
+
+		reg = overdrive_reg(ncr, addr);
+		if (reg >= 0) {
+			if (reg >= 0x100)
+				write_684xx_dma(ncr, reg, val);
+			else
+				ncr5380_bput(ncr, reg, val);
+		}
 	}
 
 #if NCR5380_DEBUG > 1
@@ -5191,6 +5252,38 @@ void fasttrak_add_scsi_unit(int ch, struct uaedev_config_info *ci, struct romcon
 	generic_soft_scsi_add(ch, ci, rc, NCR5380_FASTTRAK, 65536, 65536, ROMTYPE_FASTTRAK);
 }
 
+bool overdrive_init(struct autoconfig_info *aci)
+{
+	const struct expansionromtype *ert = get_device_expansion_rom(ROMTYPE_OVERDRIVE);
+	if (!aci->doinit) {
+		aci->autoconfigp = ert->autoconfig;
+		return true;
+	}
+
+	struct soft_scsi *scsi = getscsi(aci->rc);
+	if (!scsi)
+		return false;
+
+	load_rom_rc(aci->rc, ROMTYPE_OVERDRIVE, 8192, 0, scsi->rom, 32768, LOADROM_EVENONLY_ODDONE);
+	for (int i = 0; i < 16; i++) {
+		uae_u8 b = ert->autoconfig[i];
+		if (aci->rc->autoboot_disabled) {
+			if (i == 0)
+				b = 0xc1;
+			if (i == 10)
+				b = 0;
+		}
+		ew(scsi, i * 4, b);
+	}
+	aci->addrbank = scsi->bank;
+	return true;
+}
+
+void overdrive_add_scsi_unit(int ch, struct uaedev_config_info *ci, struct romconfig *rc)
+{
+	generic_soft_scsi_add(ch, ci, rc, NCR5380_OVERDRIVE, 65536, 32768, ROMTYPE_OVERDRIVE);
+}
+
 // x86 bridge scsi rancho rt1000
 void x86_rt1000_bput(int portnum, uae_u8 v)
 {