IBM 560 - Manual (Page 16)

Specifications
Figure 1-4 to Figure 1-7 on page 1-10 list the specifications for the
computer.
Performance Specifications
Figure 1-4. Performance Specifications for the ThinkPad 560/560E
Device Cycle
Time (ns)
Microprocessor (66 MHz–15 ns clock)
Access to RAM:
Memory read Page hit, burst
Page miss, burst 240 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
The cycle times shown for access to system-board RAM are based on 70 ns
EDO memory.
Device Cycle
Time (ns)
Microprocessor (60 MHz–16.5 ns clock)
Memory read Page hit, burst
Page miss, burst 216 ns
350 ns
Memory write Page miss, burst 50 ns
1-8 ThinkPad 560/560E System Overview