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Picture of a Model 50Z

"Jimmy and Johnny"
Model 50Zs (8550-031/061)

The most elegantly engineered Personal Computer ever!

Machine types: 8550-031 & 061
Announce Date: June 2, 1988
Purchase price: $ (Australian)
Warranty Period: 1 (stinking) year
Australian flag (patriotism is the...)
Manufactured: , Wangaratta, VIC, Australia
Microprocessor: Intel 80286 (16-bit)
Clock speed: 10MHz, 0 wait state
Coprocessor: i80287
Instruction Set: 16-bit
Addressing: 24-bit
I/O Channel Width: 16/8-bit
Type of BUS: 16-bit MCA (Micro Channel)
Interrupt levels: 16
Type (MCA): Level-sensitive, shareable
Max. Burst Transfer Mode: 20 MB/sec
Bus Data/Address Parity Checking: Yes
DMA Channels: 15
DMA Burst Mode Supported: Yes
Bus Masters Supported: 15
Total number of expansion slots: 4              (Only 1 has direct video access)
Ports: PS/2 keyboard, PS/2 mouse, serial, parallel, VGA
System Unit: F80C
On system board: 1MB (1x 1MB)
RAM: DRAM (PS/2 72-pin MMK, 1 socket) 85ns or 120ns parity checked
ROM: 128KB
ROM shadowing: No
Standard Graphics: VGA
Video Controller: 8-bit
Video Bus Master: No
Video Memory: 256K (DRAM)
RS232C Serial Ports: 1
UART Chip used: NS16550
Speed (bits/sec): 19,200               (limited by software)
FIFO Mode Enabled: No
Supports DMA Data Transfer: No
Max. Ports supported: 8
Pointing Device Ports: 1
Parallel Printer Ports: 1
Bi-directional: Yes
Supports DMA Data Transfer: No
Maximum Ports Supported: 8
CMOS Clock: Yes
Power supply: 94W, 110-220VAC auto sense
Weight: 9.55 Kg
Dimensions: H140 x W360 x D420mm
Drive bays: 3 3.5" ½ height
Floppy Disk Size: 3.5" ½ height
Capacity: 1.44MB
Media Sensing: No
Hard disk Size: 3.5" ½height
Capacity: 30MB & 60MB
Type: ST-506 (30MB)/ ESDI (60MB) (Model 50 connector)
P/N: 15F7528 (60MB)
MLC: A07254 (60MB)
IBM FRU P/N: 90X8627 (60MB)
Model: FC/04/03
Average Access time (ms): 39ms (30MB)/ 27ms (60MB)
Sector Buffer Size: ?
Encoding Method: ?
Data Transfer Rate/Second: ?MB
Revolutions Per Minute: ?
Number of Heads: ?
Number of Platters: ?
Sectors Per Track: ?
Cylinders: ?
Shock (Gs): Operating: ?
Shock (Gs): Non-operating: ?
MTBF (Hours): ?
Interleave Factor: ?
Autopark: No (30MB)/Yes (60MB)
Diskette Drive Support: yes
Date Withdrawn: 23 July, 1991 More information to come...

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