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Specifications
Processor Unit
- 8088 16-bit microprocessor
- 128 or 256k bytes RAM (standard)
- 335ns cycle time, 64k Bits Dynamic RAM chips
- Four - Expansion slots (internal) for plug-in card options
- Two - RS232 serial comms ports. Standard 25 female connectors
- One - Centronics parallel printer port
- Two - 8 bit parallel User Ports(50 pin ribbon connector on CPU board
- Memory expansion to 896k bytes
- 8k bytes of ROM (boot and diagnostic)
- 4k bytes of screen (static) RAM
- Self regulating power supply
- Optional 8087 NPX co-processor
Display System
- 25 line x 80 column screen: Characters 2 x 12 pixels in a 10 x 16 cell
- 50 line x 132 column screen mode - software selectable
- 12 inch (30 cm) picture tube with P39 green phospher
- Stabilised display circuit
- Built in 'Sunflex' optical display filter
- Adjustable horizontal viewing angle ( ± 45° swivel)
- Adjustable vertical viewing angle ( 0° to +11° tilt)
Disc Drives
- Single side floppy 5¼ (130mm) Max capacity 620.544kb per side
- Double side floppy Max capacity 121.6512kb (1.2 M byte)
- Internal 10M byte hard disk plus one 1.2M byte floppy
- Internal 30M byte hard disk plus one 1.2M byte floppy
- Single side floppy 80 tracks at 96 TPI (620544Kb)
- Double side floppy 160 tracks at 96 TPI (1216512Kb)
- Floppy's have 512 byte sectors: Using a GCR, 10-bit recording technique
- Floppy disc access times:
- 2 micro-second per bit data transfer rate
- Interleave factor of 3
- Average seek time approx 94 milli-seconds
- Track-to-track step time 3ms: Latency 100ms
- Hard drive access times
- 0.2 micro-second per bit data transfer rate
- Interleave factor of 5
- Average seek time approx 85 mili-seconds
- Head settling time 15 ms: Latency 8.33ms
Keyboard
- Seperate 8048 microprocessor
- Software definable 7 or 10 soft function keys
- Full IBM Selectric II (56 key) keyboard layout
- Type ahead buffering to 32 levels and full n-key rollover
- Capacitive keyswitches rated for 100 million operations
- keyboard contains PCB with on-board drivers
Electrical
- Input voltage 90-137 VAC or 190-270 VAC (Selected by internal jumper)
- Voltage frequency 47-63 Hz
- Output voltage regulated +5 VDC and +12 & -12 VDC
- Output voltage un-regulated +12 VDC
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