Technical data
How does it work?
DREM is based on the high performance FPGA platform and does not require the use of a PC for any file encoding operations.
DREM uses DSK disk image files, which contain the raw dump of a disk. The raw image consists of a sector-by-sector binary copy of the source medium. Since DSK files hold no additional data beyond the disk contents, DREM uses an additional CFG file to obtain disk geometry and encoding information.
DREM is equipped with an VGA output, PS/2 keyboard input and file manager software. A user can browse the SD card and insert DSK images into virtual drives. Use of a monitor and keyboard is optional: DREM may load default configuration from file on power up. With an optional VGA monitor and PS/2 keyboard users may access a live transaction log and monitor drive activity in great detail. At any time a user may start or stop capturing log data into file on the SD card, which is very useful for analyzing low level format information.
DREM comes with many CFG files for frequently used host computers. However, if you are not quite sure about the low level format for a particular host, DREM will provide an analysis in a log file captured during low level format (LLF) operations.
Technical Specifications
Dimensions: 170 mm x 125 mm
Fits 3”5 PC drive bay
Power: 5VDC 640mA via one of the following:
3”5 PC MOLEX connector
5”25 PC MOLEX connector
NeXT FDD Interface
JVC 26pin HDD Interface
Computing platform
Xilinx Spartan 6 XC6SLX25
128Mb SDRAM
Microchip PIC24F
RTC
Power up ready time: 7 sec.
Storage:
SD or SDHC Card FAT32 (or miniSD, microSD cards via appropriate adapter)
Most types and sizes are supported. Usable space is limited to 32GB (FAT32 limitation)
SPI 20/40 Mbit/s
Monitor (Optional): VGA 15-pin 640x480 60Hz 31.2KHz
Keyboard and Mouse (Optional): PS/2
Interfaces
FDD:
34-pin (17x2) 2.54mm pitch male IDC pin header
HDD:
34-pin (17x2) 2.54mm pitch male shrouded IDC pin header +
2x 20-pin (10x2) 2.54mm pitch male shrouded IDC pin header
JVC 26pin HDD:
6-pin (13x2) 2.54mm pitch male shrouded IDC pin header
DEC RLV12:
40-pin (20x2) 2.54mm pitch male shrouded IDC pin header
FDD Emulation
Interface Modes: Shugart/IBM-PC/Amiga/NeXT/DEC RX50
Number Of Drives: 4
Encoding: FM, MFM, FM/M2FM(MMFM) Mixed mode
Bitrate, bps: 250K, 310K, 500K, 1M
RPM: 150, 288, 300, 360, 600
Sides: SS or DS. Possible to load two SS images into DS drive.
Pre-compensation: None, Low, Hi
Sectioning: Soft and Hard
Supported devices
AED FLEX0
Agath 840K (DSK and AIM)
AMIGA (drive identification supported)
DEC 8in RX01/RX02 Compatible Controllers (FM and M2FM)
DEC RX50, RX33
DVK MX
Data Systems Design DSD4140
Dilog DQ419
E-Mu Emulator II
Elektronika BK, MC-0511 (aka UKNC)
Heathkit H17
HP-86A (HP 9130A)
HP 9153 A/B/C
ISO, IBM (any possible sector size)
KR1801VP1-128 based: DVK MY
Lvov PK-01 (DSK and special virtual disk modes for LVT files)
Micro Development Associates MDS MXV21
Nemiga MD (DSK and MD)
NeXT
Northstar Advantage
Sigma Information Systems SDC-RXV21 SDC-RXV31
HDD Emulation
Interface: ST-506/ST-412, JVC 26Pin, DEC RLV
Number Of Drives: 4
Encoding: MFM, RLL(2,7), ARLL
Bitrate, bps: 4.1Mbps, 4.34Mbps, 5Mbps, 5.5Mbps, 7.5Mbps, 9Mbps
RPM: 2400, 2597, 3000, 3600
Heads: 1 – 16
Cylinders: 2048 max
Pre-compensation: None, Low
Sectioning: Soft and Hard
Supported devices
Adaptec ACB-4000 (E-Mu Emulator II+HD, Atari SH204)
Adaptec MFM ACB-2010A
Adaptec RLL ACB-2372B
Adaptec RLL ACB-2070A
Adaptec RLL ACB-4070 and compatible (Atari Megafile)
Bostomatic 312 + SPC-II Controller
Compupro Disk 3
Convergent Technologies AWS SA-100
Corvus H Drive
Data General DG/20
DTC WD1010 compatible controllers
DTC WD2010 compatible controllers (i.e. DTC-7180)
DTC-5160 RLL
DEC Pro-3xx RD
DEC RQDX3 (PDP, MicroVAX), RLV
DVK DW
Elektronika MC-0585 (aka Elektronika 85) RD
IBM 1501492 (XEBEC)
IBM 5170 WD1010 , PC JX (WDC1010A) compatible controllers
Intel 8206 and 82062 based controllers (WD2010 compatible)
Heathkit H17
NCL NDC
NEC-16T (PC-9800)
Neve Mixing Console (GML Idris)
Northstar Advantage
Perstor Systems Inc. ADRC9008 (ARRL 9 Mbps)
Poisk-1 B942
SMC HDC9234 based controllers(TI-99/4 Myarc HFDC)
Seagate ST11M MFM, Seagate ST11R, ST-21R, ST-22R RLL
SMS OMTI Series 5510, 5000 and 20 (AMIGOS / PROMIGOS)
SMS FWD8006 HDD+FDD Multubus
Western Digital WD1010 based controllers (any sector size, CRC16)
Western Digital WD2010 based controllers (any sector size, CRC16 and ECC32)
Western Digital WD5010 based controllers (any sector size, CRC16 and ECC32)
Western Digital WD5011 based controllers (any sector size, CRC16 and ECC32, ECC56 RLL)
Western Digital WD50C12 based controllers (any sector size, CRC16 and ECC32, ECC56 RLL)
Xebec
Xerox Rigid Disk
26pin JVC-SMS OMTI hard sectored (EPSON Equity LT)