From e6f5018d51d002f28625d8c5aaa768006f3ffa22 Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Tue, 1 Mar 2022 14:20:11 +0100
Subject: [PATCH] Added the Corel LS2000 53c400-based card.

---
 src/include/86box/scsi_ncr5380.h |  1 +
 src/scsi/scsi.c                  |  1 +
 src/scsi/scsi_ncr5380.c          | 39 ++++++++++++++++++++++++++++----
 3 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/src/include/86box/scsi_ncr5380.h b/src/include/86box/scsi_ncr5380.h
index 380f379e6..6053e0275 100644
--- a/src/include/86box/scsi_ncr5380.h
+++ b/src/include/86box/scsi_ncr5380.h
@@ -28,6 +28,7 @@ extern const device_t scsi_lcs6821n_device;
 extern const device_t scsi_rt1000b_device;
 extern const device_t scsi_t128_device;
 extern const device_t scsi_t130b_device;
+extern const device_t scsi_ls2000_device;
 #if defined(DEV_BRANCH) && defined(USE_SUMO)
 extern const device_t scsi_scsiat_device;
 #endif
diff --git a/src/scsi/scsi.c b/src/scsi/scsi.c
index 638c0bfaa..b898f9de8 100644
--- a/src/scsi/scsi.c
+++ b/src/scsi/scsi.c
@@ -77,6 +77,7 @@ static SCSI_CARD scsi_cards[] = {
     { &buslogic_542bh_device,		},
     { &buslogic_545s_device,		},
     { &buslogic_545c_device,		},
+    { &scsi_ls2000_device,		},
     { &scsi_lcs6821n_device,		},
     { &scsi_rt1000b_device,		},
     { &scsi_t128_device,		},
diff --git a/src/scsi/scsi_ncr5380.c b/src/scsi/scsi_ncr5380.c
index 60f4632e3..083efabe4 100644
--- a/src/scsi/scsi_ncr5380.c
+++ b/src/scsi/scsi_ncr5380.c
@@ -48,6 +48,7 @@
 #define RT1000B_820R_ROM	"roms/scsi/ncr5380/RTBIOS82.ROM"
 #define T130B_ROM	"roms/scsi/ncr5380/trantor_t130b_bios_v2.14.bin"
 #define T128_ROM	"roms/scsi/ncr5380/trantor_t128_bios_v1.12.bin"
+#define COREL_LS2000_ROM "roms/scsi/ncr5380/Corel LS2000 - BIOS ROM - Ver 1.65.bin"
 
 
 #define NCR_CURDATA	0		/* current SCSI data (read only) */
@@ -712,7 +713,7 @@ ncr_write(uint16_t port, uint8_t val, void *priv)
 		break;
     }
 
-    if (ncr->dma_mode == DMA_IDLE || ncr_dev->type == 0 || ncr_dev->type == 3) {
+    if (ncr->dma_mode == DMA_IDLE || ncr_dev->type == 0 || ncr_dev->type >= 3) {
 	bus_host = get_bus_host(ncr);
 	ncr_bus_update(priv, bus_host);
     }
@@ -1079,9 +1080,9 @@ ncr_dma_send(ncr5380_t *ncr_dev, ncr_t *ncr, scsi_device_t *dev)
     }
 
     /* Data ready. */
-    if (ncr_dev->type == 3) {
+    if (ncr_dev->type == 3)
 		data = ncr_dev->t128.buffer[ncr_dev->t128.pos];
-	} else
+	else
 		data = ncr_dev->buffer[ncr_dev->buffer_pos];
     bus = get_bus_host(ncr) & ~BUS_DATAMASK;
     bus |= BUS_SETDATA(data);
@@ -1506,6 +1507,18 @@ ncr_init(const device_t *info)
 				t128_write, NULL, NULL,
 				ncr_dev->bios_rom.rom, MEM_MAPPING_EXTERNAL, ncr_dev);
 		break;
+
+	case 4:		/* Corel LS2000 */
+		ncr_dev->rom_addr = device_get_config_hex20("bios_addr");
+		ncr_dev->irq = device_get_config_int("irq");
+		rom_init(&ncr_dev->bios_rom, COREL_LS2000_ROM,
+			 ncr_dev->rom_addr, 0x4000, 0x3fff, 0, MEM_MAPPING_EXTERNAL);
+
+		mem_mapping_add(&ncr_dev->mapping, ncr_dev->rom_addr, 0x4000,
+				memio_read, NULL, NULL,
+				memio_write, NULL, NULL,
+				ncr_dev->bios_rom.rom, MEM_MAPPING_EXTERNAL, ncr_dev);
+		break;
     }
 
     sprintf(temp, "%s: BIOS=%05X", ncr_dev->name, ncr_dev->rom_addr);
@@ -1516,7 +1529,7 @@ ncr_init(const device_t *info)
     ncr_log("%s\n", temp);
 
     ncr_reset(ncr_dev, &ncr_dev->ncr);
-	if (ncr_dev->type < 3) {
+	if (ncr_dev->type < 3 || ncr_dev->type == 4) {
 		ncr_dev->status_ctrl = STATUS_BUFFER_NOT_READY;
 		ncr_dev->buffer_host_pos = 128;
 	} else {
@@ -1572,6 +1585,12 @@ t128_available(void)
     return(rom_present(T128_ROM));
 }
 
+static int
+corel_ls2000_available(void)
+{
+    return(rom_present(COREL_LS2000_ROM));
+}
+
 // clang-format off
 static const device_config_t ncr5380_mmio_config[] = {
     {
@@ -1735,3 +1754,15 @@ const device_t scsi_t128_device =
     NULL, NULL,
     t128_config
 };
+
+const device_t scsi_ls2000_device =
+{
+    "Corel LS2000",
+    "ls2000",
+    DEVICE_ISA,
+    4,
+    ncr_init, ncr_close, NULL,
+    { corel_ls2000_available },
+    NULL, NULL,
+    ncr5380_mmio_config
+};