Dynamac

 | 

Early Mac Clones

 | 

Low End Mac

 | 

Tech Specs

Dynamac IIsf and IIsf/30

Daniel Knight - 1991.01.14

I found this one mentioned in the July 1991 MacUser magazine, although the Dynamac IIsf had been announced in January 1991. Where the original Dynamac (1987) was essentially a portable Mac Plus, and the short-lived Dynamac SE/30 (1988) was an Mac SE/30 with a 640 x 480 8-bit video card that also supported the 1152 x 870 pixel Apple Two-Page Display in 2-bit mode, the Dynamac IIsf was built around a Mac LC motherboard and weighed about 4 lb. less than the Mac Portable.

“The Dynamac IIsf is a leather-cased portable with an LC motherboard and a 640 x 480 pixel, 16-gray backlit, flat-panel display. It includes a touch pad, has a battery life of three hours,and comes with 2 megabytes of RAM and a 40 megabyte hard-disk drive. The IIsf can drive Apple’s 12-inch RGB and monochrome displays.”

Note that the Dynamac IIsf/30 predates the 1992 Mac LC II, which was Apple’s update to the original LC that moved to a 68030 CPU.

Details, Dynamac IIsf

  • introduced early 1991 at $4,995
  • Gestalt ID: 19

Mac OS

Core System

  • CPU: 16 MHz 68020
  • FPU: 68881 (optional, uses LC PDS slot)
  • ROM: 512 KB
  • RAM: 2 MB on motherboard, expandable to 10 MB using a pair of 100ns 30-pin SIMMs; can use 1 MB, 2 MB, and 4 MB SIMMs
  • L2 cache: none

Performance

  • 1.8, relative to SE (compare to 2.4 for Mac II)
  • 0.87, MacBench 2.0 CPU
  • 3.31, Speedometer 3.06
  • 0.22, Speedometer 4
  • 2.6 MIPS

Graphics

  • video: 256 KB VRAM SIMM, expandable to 512 KB; supports 512 x 384 and 640 x 480 resolutions (must have 512 KB VRAM for 8 bits at 640 x 480, 16 bits at 512 x 384)
  • VRAM: accepts one 100ns VRAM SIMM, 256 KB standard, can be upgraded with single 512 KB VRAM SIMM, other specs unknown, VRAM SIMM appears to be specific to early Macs.
  • video port: DA-15

Drives

  • Hard drive: 40 MB SCSI
  • floppy drive: 1.4 MB double-sided

Expansion

  • ADB ports: 1
  • serial ports: 2 DIN-8 RS-422 on back of computer
  • SCSI ports: DB-25 connector on back of computer
  • sound: 8-bit mono
  • audio in: 8-bit mono
  • expansion slot: LC PDS slot

Physical

  • size (HxWxD): unknown
  • Weight: about 12 lb.
  • PRAM battery: 3.6V half-AA

Differences, Dynamac IIsf/30

  • Price: $6,995
  • CPU: 16 MHz 68030
  • FPU: 16 MHz 68882
  • RAM: 4 MB
  • 2400 bps data modem
  • 9600 bps fax modem
  • 6 hour battery life

Further Reading

Keywords: #dynamaciisf #dynamaciisf30

Short link: http://goo.gl/lJg0G4