50/50Z
CPU- 486SLC2/50
Coprocessor Socket 387SX 
Memory
Max on board 16MB
Type 2, 4, or 8MB, 70nS parity
SIMM Sockets  Three
MCA Expansion slots three 16-bit (includes one video extension)
BIOS 128K flash Memory EPROM
Video Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM (2 SOJ)
Video Extension: One
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16: 4 bits/pixel
Parallel/Serial: One enhanced, bi-di with DMA support/one enhanced with DMA support
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 1.44 and 2.88MB floppies
Clock/calendar integrated CMOS battery

55SX
CPU- 486SLC2 25/50
Coprocessor Socket 387SX 
Memory
Max on board 16MB
Type 2, 4, or 8MB, 70nS parity
SIMM Sockets  Three
MCA Expansion slots three 16-bit (includes one video extension)
BIOS 128K flash Memory EPROM
Video Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM (2 SOJ)
Video Extension One
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
Parallel/Serial: One enhanced, bi-di with DMA support/one enhanced with DMA support
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 1.44 and 2.88MB floppies
Clock/calendar integrated CMOS battery

70
CPU- 486SLC2/50
Coprocessor Socket 387SX 
Memory
Max on board 16MB
Type 2, 4, or 8MB, 70nS parity
SIMM Sockets  Three
MCA Expansion slots three 16-bit (includes one video extension)
BIOS 128K flash Memory EPROM
Video Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM (2 SOJ)
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16: 4 bits/pixel
Parallel/Serial: One enhanced, bi-di with DMA support/one enhanced with DMA support
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 1.44 and 2.88MB floppies
Clock/calendar integrated CMOS battery

30-286
CPU- 486SX2/50, 486DX2/66, 486DX4/100
CPU Upgrade Socket Intel Overdrive
Memory
Max on board 32MB
Type 2, 4, 8 or 16MB, 70nS parity
SIMM Sockets  Two
BIOS 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
Parallel/Serial: One bi-di/one
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 720KB and 1.44MB floppy drives
Clock/calendar Lithium Battery
ISA Expansion slots: Three 16-bit

50/50Z
CPU- 486DX2/66, 486DX4/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Four
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One bi-di/one
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 720KB, 1.44 and 2.88MB floppy drives
Clock/calendar Integrated CMOS battery back-up (10 year life)
MCA Expansion slots: Three 32-bit, one 16-bit with video extension

55SX
CPU- 486DX2/66, 486DX4/100, 586/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Four
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One enhanced, bi-di w/DMA support / one enhanced w/DMA support
Pointing Device/KB: PS/2 compatible
HD Support AT/IDE and existing drive
Floppy controller supports 720KB, 1.44 and 2.88MB floppy drives
Clock/calendar Integrated CMOS battery back-up (10 year life)
MCA Expansion slots: Three 32-bit, (one slot has a video extension)

56/57
CPU- 486DX2/66, 486DX4/100, 586/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Four
optional L2 cache 128K write-through
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One enhanced, bi-di w/DMA support / one enhanced w/DMA support
Pointing Device/KB: PS/2 compatible
HD Support SCSI-2 controller with existing drive
Floppy controller supports 720KB, 1.44 and 2.88MB floppy drives
Clock/calendar Integrated CMOS battery back-up (10 year life)
MCA Expansion slots: 
56 uses existing 16-bit three slot riser; optional 32-bit riser
57 uses existing 16-bit five slot riser; optional 32-bit riser
 

60/65/80
CPU- 486DX2/66, 486DX4/100, 586/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Four
optional L2 cache 128K write-through
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One enhanced, bi-di w/DMA support / one enhanced w/DMA support
Pointing Device/KB: PS/2 compatible
HD Support local-bus AT/IDE and existing drive
Floppy controller supports 1.44 and 2.88MB floppy drives
Clock/calendar CMOS battery (10 year life)
MCA Expansion slots: Seven 32-bit, one 16-bit with video extension

70
CPU- 486DX2/66, 486DX4/100, 586/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Three
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One enhanced, bi-di w/DMA support / one enhanced w/DMA support
Pointing Device/KB: PS/2 compatible
HD Support local-bus AT/IDE and existing drive
Floppy controller supports 720KB, 1.44 and 2.88MB floppy drives
Clock/calendar Integrated CMOS battery back-up (10 year life)
MCA Expansion slots: Two 32-bit, one 16-bit with video extension

76/77
CPU- 486DX2/66, 486DX4/100, 586/100
CPU Upgrade Socket Intel Overdrive with automatic voltage detection and switching.
Memory
Max on board 64MB
Type 4, 8, 16 or 32MB, 70nS parity
SIMM Sockets  Four
optional L2 cache 128K write-through
BIOS dual 128K flash Memory EPROM
Video 64-bit Local bus SVGA with GUI accelerator
Video Memory- 1MB DRAM standard, optional 2MB
Video Resolutions supported
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
1,280x1,024, 16; 4 bits/pixel
Video Extension: One
Parallel/Serial: One enhanced, bi-di w/DMA support / one enhanced w/DMA support
Pointing Device/KB: PS/2 compatible
HD Support SCSI-2 controller with existing drive
Floppy controller supports 1.44 and 2.88MB floppy drives
Clock/calendar CMOS battery (10 year life)
MCA Expansion slots:
76 three-slot 32-bit riser included
77 five-slot 32-bit riser included

Technical Questions

32-bit enhanced mode is supposedly not supported.
Hds larger than 1GB are supported if you use logical drives (?)
Some boards allow disabling on-board video
Supposedly the built-in IDE controllers do not support IDE CD ROMs

BIOS Files
TurboBoard
30  1.09  109-30.exe
50/55/70 1.40 140-50.exe
60/65/80 1.31 131-80.exe
70, 32-bit 1.19 119-70.exe

PowerBoard
25/30 1.02 102-30.exe
50/55/60/65/70/80 1.17 117-PB.exe
56/57/76/771.11 111-56.exe
Reply System
32 2.25 225-32.exe
32 w/DX4-100 2.26 T226.dat

Refdisk
Reply Systems 3.46 REF346.EXE
Turbo/Power Boards 3.67 ref367.exe

Diags
TurboBoard 30 1.02 diag1_02.exe
PowerBoard 25/20 1.08 dg108720.exe

ADF
Reply system  16and 32 @6094.adf
Reply MCA Video @8182.adf
Reply MCA Sound w/SCSI @5137.adf wo/SCSI @5138.adf
Windsurfer card with (Reply?) video card present @8FEB.adf