Small compatibility improvements, and added scsi2sd-monitor test program
[SCSI2SD-V6.git] / readme.txt
1 SCSI2SD, The SCSI Hard Drive Emulator for retro computing.
2
3 Traditional hard drives last 5 years*. Maybe, if you're luckly, you'll get 10
4 years of service from a particular drive. The lubricants wear out, the spindles
5 rust. SCSI2SD is a modern replacement for failed drives. It allows the use of
6 vintage computer hardware long after their mechanical drives fail. The use of
7 SD memory cards solves the problem of transferring data between the vintage
8 computer and a modern PC (who still has access to a working floppy drive ?)
9
10 *All statistics are made up.
11
12
13 Features
14
15 In-built active terminator.
16 Emulates up to 4 SCSI devices
17 Supports sector sizes from 64 bytes to 8192 bytes
18 Firmware updatable over USB
19 Highly configurable over USB
20 Selectable SCSI ID
21 Selectable parity support
22 Enable/disable Unit Attention Condition
23 Artificial limits on the SCSI disk size (eg. limit size to 4G to avoid OS bugs)
24 Sector size (can also be set via the SCSI MODE SELECT command, as sent by SCSI format utilities).
25
26
27 Technical Specifications
28
29 SCSI Interface
30 SCSI-2 Narrow 8-bit 50-pin connector. Supports asynchronous transfers only.
31 SD Card Interface
32 Standard SDSC (1GB maximum size)
33 SDHC, SDXC
34 Communication is via the SPI protocol at 25MHz.
35 Power
36 5V via standard molex drive connector.
37 Dimensions
38 10cm x 10cm x 1.5cm
39 Mounting holes to suit standard 2.5" - 3.5" drive bracket.
40
41
42 Performance
43
44 As currently implemented:
45
46 Transfer size: 512 2048 8192 65536
47 -------------------------------------------------------
48 read: 2MB/s 2.1MB/s 2.5MB/s 2.6MB/s
49 write: 125kB/s 441kB/s 1.5MB/s 2.3MB/s
50 -------------------------------------------------------
51
52
53 Tested with a 16GB class 10 SD card, via the commands:
54
55 # WRITE TEST
56 sudo dd bs=${SIZE} count=100 if=/dev/zero of=/dev/sdX oflag=dsync
57
58 # READ TEST
59 sudo dd bs=${SIZE} count=100 if=/dev/sdX of=/dev/null
60
61 Compatibility
62 Computer systems
63
64 Mac LC-III and LC-475
65 Mac II running System 6.0.8
66 Mac SE/30
67 Apple IIgs using Apple II High Speed SCSI controller card (from v3.3)
68 Symbolics Lisp Machine XL1200, using 1280 byte sectors (from v3.4)
69 PDP-11/73 running RSX11M+ V4.6
70 Microvax 3100 Model 80 running VMS 7.3 (needs patch against v3.5.2 firmware)
71 Amiga 500+ with GVP A530
72 Atari TT030 System V
73 Atari MEGA STE
74 needs J3 TERMPWR jumper
75 1GB limit (--blocks=2048000)
76 Sharp X68000
77 SASI models supported. See gamesx.com for information on building a custom cable.
78 needs J3 TERMPWR jumper
79 Set to SCSI ID 3. ID0 will not work.
80 Compaq XP-1000 Professional Workstation
81 Alpha 21264 CPU, 667MHz, with a QLogic SCSI controller in a PCI slot
82 SCSI-based Macintosh Powerbooks (2.5" SCSI2SD)
83 Also reported to work on Thinkpad 860 running Win NT 4.0 PowerPC.
84 Data General MV/2500DC running AOS/VS
85 Vendor: MICROoP
86 Product: 1578-15 UP
87 Revision: DG02
88 Device-type modifier: 0x4c
89
90 Samplers
91
92 Roland JS-30 Sampler
93 Akai S1000, S3200, S3000XL, MPC 2000XL, DPS 12
94 SCSI cable reversed on S3200
95 There are compatibility problems with the Akai MPC3000. It works (slowly) with the alternate Vailixi OS with multi-sector transfers disabled.
96 EMU Emulator E4X with EOS 3.00b and E6400 (classic) with Eos 4.01
97 EMU E6400 w/ EOS2.80f
98 EMU Emax2
99 Ensoniq ASR-X, ASR-10 (from v3.4, 2GB size limit)
100 ASR-20 Requires TERMPWR jumper.
101 ASR-X resets when writing to devices > 2Gb.
102 Kurzweil K2000R
103 See kurzweil.com for size limits which a dependant on the OS version. Older OS versions have a 1GB limit.
104 SCSI cable reversed
105 Casio FZ-20M
106 Requires TERMPWR jumper. The manual shows the pin25 of the DB25 connector is "not connected".
107 May require scsi2sd-config --apple flag
108 Yamaha A5000, A3000, EX5, EX5R
109
110 Other
111
112 HP 16601A, 16700A logic analyzers
113 Fluke 9100 series
114 Reftek RT-72A Seismic datalogger.
115 http://www.iris.iris.edu/passcal/Reftek/72A-R-005-00.1.pdf
116 http://www.iris.iris.edu/passcal/Manual/rtfm.s3a.13.html
117 Konami Simpson's Bowling arcade machine
118 http://forums.arcade-museum.com/showthread.php?p=3027446