IBM manual 4. Performance Specifications for the ThinkPad 560/560E, clock

Specifications

Figure 1-4

to Figure 1-7

on

page 1-10

list the

specifications

for the

computer.

Performance

Specifications

Cycle

Device

Time

(ns)

Microprocessor

(66

MHz–15

ns

clock)

Access

to

RAM:

ñ

Memory

read

Page

hit,

burst

240

ns

Page

miss,

burst

360

ns

Memory

write

Page

miss,

burst

45

ns

Access

to

ROM

:

1000

Refresh

rate

(typically

performed

µeverys)

15.6 750

(minimum)

DMA

controller

(4

MHz–250

µs

clock)

:

1250

Bus

cycles

(AT) :

8 bit

1000

16 bit

625

ñ

The

cycle

times

shown

for

access to

system-board RAM

are

based on 70

ns

EDO

memory.

Cycle

Device

Time

(ns)

Microprocessor (60 MHz–16.5 ns clock)

Memory

read

Page

hit,

burst

216

ns

Page

miss,

burst

350

ns

Memory

write

Page

miss,

burst

50

ns

Figure 1-4. Performance Specifications for the ThinkPad 560/560E

1-8ThinkPad 560/560E System Overview