IBM 560E Manual Do Utilizador
Specifications
Figure 1-4 to Figure 1-7 on page 1-10 list the specifications for the
computer.
computer.
Performance Specifications
Figure
1-4. Performance Specifications for the ThinkPad 560/560E
Device
Cycle
Time (ns)
Time (ns)
Microprocessor (66 MHz–15 ns clock)
Access to RAM:
Access to RAM:
ñ
Memory read
Page hit, burst
Page miss, burst
Page miss, burst
240 ns
360 ns
360 ns
Memory write
Page miss, burst
45 ns
Access to ROM:
1000
Refresh rate (typically performed every 15.6
µ
s)
750 (minimum)
DMA controller (4 MHz–250
µ
s clock):
1250
Bus cycles (AT):
8 bit
16 bit
1000
625
ñ
The cycle times shown for access to system-board RAM are based on 70 ns
EDO memory.
EDO memory.
Device
Cycle
Time (ns)
Time (ns)
Microprocessor (60 MHz–16.5 ns clock)
Memory read
Page hit, burst
Page miss, burst
Page miss, burst
216 ns
350 ns
350 ns
Memory write
Page miss, burst
50 ns
1-8
ThinkPad 560/560E System Overview