Epson Progression 4 - Manual (Page 7)

Processor Chips
EPSON Progression 4
Hard Disk Drive Types
If you have the 4SX/33 system, you can install an Intel
OverDrive processor or a
microprocessor (with built-in math coprocessor) on the main
system board. Installing an OverDrive processor effectively
doubles the internal clock speed of the computer’s
microprocessor; future OverDrive processors may be
available for the 4DX2 /50 and 4DX2 /66 systems.
The table below lists types of hard disk drives you can use in
the computer. Check this table and your hard disk manual to
find the correct type number(s) for the hard disk drive(s)
installed in the computer. You need to enter the type
number(s) when you set the hard disk drive configuration in
the SETUP program.
Hard Disk Drive Types
SIMM Installation
There are two SIMM sockets on the main system board. To
increase the amount of memory in the computer up to
128MB, you can install 36-bit, fast-page mode SIMMs that
operate at an access speed of 70 ns or faster, with a capacity
of 1MB, 4MB, 16MB, or 64MB.
The following table shows the possible SIMM configurations;
do not install memory in any other configuration. Make sure
that both SIMMs operate at the same speed. There is 4MB of
memory soldered onto the main system board.
SIMM Configurations
SIMM 1 Total memory
4MB *
5MB
l * 128MB I
Standard soldered memory
‘*When SIMM is available
This memory configuration disables the 4MB of soldered memory
Type Landing Sectors Size’
no. ( ) m e ( S E C ) ( I n
1
2
3 615 6 615 17
4 940 512 940 17
5 6 512 940 17 46
6 615 4 615 17 20
ST-325A
7 462 a 256 511 17
a 733 5 17
9
1112 I
la20 la20 I
a 33
26
27
7 300 40
976 5 466 977 17 40
29
30
36
a
547 al
761
a
none 760 39 115
40 Qao IO 979 17 al
41 1022 5 1022 34
42 1022 5 1022 36
43 1024 a 512 17
44 none 34 137
45 1024 5 512 1023 17 42
46 615
a
17 40
l
Actual size when formatted may be slightly different than the size listed
on the drive label.
Hard disk drive supported in translate mode
Epson drives
5/3/93 EPSON Progression 4-7