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DASD Storage Interface Specification MCA (REV 2.2)
DBA-ESDI drive pinout - page 52-53 physical (8570 TR, identifies generic pinout!)
Onsite 9552 IDE Controller Kit
IBM 240MB Upgrade Flex Electronics
H12326 New 9552 FRUs For Upgrade Options
Onsite 9552 IDE Controller Kit
Compatible with TP 700, 700c, 720, or 720c, replaces existing cable.
Supports 32-bit access in W95 (all others use 'compatibility mode').
Uses any 8-12mm IDE drive >/=540MB; BIOS rounds down to 2GB,1GB or 540MB.
Requires new BIOS chip, refdisk ver 1.20.
About 2x as fast as original ESDI drives.
These interfaces were designed by the Swedish company Onsite in about 1995.
There seems to be some interest in these, and there are about 500 unpopulated
flex PCB's left, so they may put back into production (the remaining 500 only)
at some point. These were used in replacement plug-in drives sold to corporate
customers (@$1200+ in 1995!).
The strange 'round-down' scenario is a function of the controller chip
passing specific hard-coded geometry parameters to the BIOS. It was easier to
modify the BIOS than re-do the chip as drive sizes increased. They all use the
same cyl/sector count, but the head no. is 16, 32 or 64 for the 540MB, 1GB and
2GB sizes respectively. IBM never made any DBA-ESDI drives bigger than 160 MB,
and their 240 and 340 MB drives used a similar interface translation chip.
IBM 240MB Upgrade Flex Electronics
G32
38
JC |
62G8285
IBM 98
19335 |
14.318 MHz
KDK
3G |
G245A
34
JF |
Major Tom fell from the Sky:
About the main (QFP) chip... it will be a proprietary thing, so
unless we can find a patent or technical disclosure bulletin that discusses it,
we are out of luck (reverse engineering the chip is not worth the effort
probably).
Not sure why they need a local oscillator either.
The rest is just some glue logic. G32 is your standard 74LS32 4xOR. G245A is
a bus transceiver (74LS245), as Louis pointed out already, and it's probably
being used for the top 8 data bits. The other 8 bits are going through the ASIC
it seems. Would have to check where exactly it all goes on the IDE
connector...
62G8285 date 19335 mfd 93, 35th week?
G32 - 74LS32 Quadruple 2-Input Positive-OR Gate
G245A - 74ALS245 Octal Bus Transceivers With 3-State Outputs
These octal bus transceivers are designed for asynchronous two-way
communication between data buses. The control-function implementation minimizes
external timing requirements.
The devices allow data transmission from the A bus to the B bus or from the
B bus to the A bus, depending upon the logic level at the direction-control
(DIR) input. The output-enable (OE) input can be used to disable the device so
that the buses are effectively isolated.
H12326 NEW 9552 FRUS FOR UPGRADE OPTIONS
The 9552 has two options that require FRU upgrades when they are installed.
The options are the processor upgrade from 25 MHz to 50 MHz and the 240 / 340 MB
fixed disk upgrade. When either of these options are installed a PLCC is
replaced on the system board along with a new system board FRU number which is
placed over the old FRU number. The 240Mb and 340Mb fixed disk option also
comes with a new HDD door, FRU P/N 53G9172. The new door is needed to allow for
the longer fixed disk drive. It is identical from the outside, but spacers are
removed on the inside to allow for the longer length of the drive. It replaces
the existing door FRU P/N 44G3777.
Note: When replacing a Fixed disk drive door on a
700 or 700C system the 720 door, FRU P/N 53G9172, must be used, if a 240Mb or
340Mb fixed disk is installed.
Note: The BIOS ROM part numbers listed in the
matrix below can be used to identify the system board, if the system board FRU
label was not installed during an upgrade. These can not be ordered as FRUs.
The BIOS ROM module is located on the system board in a 3/4" by 5/8" socket. If
the system board fails because of the upgrade installation a system board FRU
must be ordered.
The IBM ThinkPad 700/700C/720/720C Ref/Diagnostic Diskette must be at
version 1.20 or later to support the 240Mb disk upgrade.
The 486 processor upgrade option for the 700 and 700C 9552 systems upgrades
the system speed from 25 to 50 MHz. The option allows the customer to choose
battery saver, 25 or 50 MHz speeds. If the option is installed the new power
management screen will look like this:
"AUTO(LONG BATTERY LIFE)"
|
V
"MAX(HIGH PERFORMANCE)"
|
V
"DOUBLE(50 MHz)"
Note: Only systems with the upgrade will have
"Double (50 MHz)"
The following chart documents the correct system board and processor FRU
based on model and options.
To use this chart find the system model on the top line and the option in
question under the "MODEL Speed" column. The vertical and horizontal
intersection of these columns contains the appropriate option, FRU and BIOS
part numbers. Note: Option part numbers and BIOS numbers can not be ordered as
replacement parts. The FRU contains the correct BIOS level.
O/N = OPTION PART NUMBER
SYSTEM BOARD / PROCESSOR FRUS
________________________________________________________________
MODEL | 700 | 700C | 720 | 720C
Speed | 25 MHz | 25 MHz | 50 MHz | 50 MHz
----------|-----------------------------------------------------
NO OPTION | | | |
SYSBRD FRU| P/N44G3780 | P/N49G1975 | P/N53G9204 | P/N53G9205
PROC FRU | P/N44G3781 | P/N44G3781 | P/N54G1045 | P/N54G1045
----------|-----------------------------------------------------
PROC UPGRD| O/N54G1032 | O/N54G0935 |N/A No Proc |N/A No Proc
SYSBRD FRU| P/N54G1046 | P/N54G1047 |Upgrade is |Upgrade is
BIOS ROM | 59G3301 | 39G9998 |available |available
50 MHz FRU| P/N54G1045 | P/N54G1045 |on the 720. |on the 720C
----------|-----------------------------------------------------
240 UPGRAD| O/N66G3219 | O/N66G3220 | O/N53G9263 | O/N53G9275
SYSBRD FRU| P/N53G7822 | P/N53G7823 | P/N53G7826 | P/N53G7827
BIOS ROM | 59G3655 | 59G3656 | 59G3653 | 59G3654
PROC FRU | P/N44G3781 | P/N44G3781 | P/N54G1045 | P/N54G1045
SYSTEM BOARD / PROCESSOR FRUS
_______________________________________________________________
MODEL | 700 | 700C | 720 | 720C
Speed | 25 MHz | 25 MHz | 50 MHz | 50 MHz
----------|----------------------------------------------------
240MB & | | | N/A No Proc |N/A No Proc
PROC UPGRD| O/N66G3221 | O/N66G3222 | Upgrade is |Upgrade is
SYSBRD | P/N53G7824 | P/N53G7825 | available |available
BIOS ROM | 59G3657 | 59G3658 | on the 720. |on the 720C
50 MHz FRU| P/N54G1045 | P/N54G1045 | |
----------|-----------------------------------------------------
340 UPGRAD| O/N53G7858 | O/N53G7859 | O/N53G7856 | O/N53G7857
SYSBRD FRU| P/N53G7822 | P/N53G7823 | P/N53G7826 | P/N53G7827
BIOS ROM | 59G3655 | 59G3656 | 59G3653 | 59G3654
PROC FRU | P/N44G3781 | P/N44G3781 | P/N54G1045 | P/N54G1045
----------|----------------------------------------------------
340MB & | | | N/A No Proc |N/A No Proc
PROC UPGRD| O/N53G7860 | O/N53G7861 | Upgrade is |Upgrade is
SYSBRD | P/N53G7824 | P/N53G7825 | available |available
BIOS ROM | 59G3657 | 59G3658 | on the 720. |on the 720C
50 MHz FRU| P/N54G1045 | P/N54G1045 | |
----------------------------------------------------------------
240MB HDD FRU P/N 66G3200 (Requires 720 door P/N53G9172 on 700)
340MB HDD FRU P/N 53G7862
THINKPAD 700/720 OPTIONS AND ACCESSORIES
.--------+----------------+-----+-----+-----+-----+---------------.
|Part # |Description | 700 | 700C| 720 | 720C|Comments |
|--------+----------------+-----+-----+-----+-----+---------------|
|54G0132 |160MB HDD | Y | Y | Y | Y |New 700/700C |
|53G9263 |240MB HDD Kit | N | N | Y | N |720 only |
|53G9275 |240MB HDD Kit | N | N | N | Y |720C only |
|66G3219 |240MB HDD Kit | Y | N | N | N |700 only |
|66G3220 |240MB HDD Kit | N | Y | N | N |700C only |
|66G3221 |240MB HDD Kit | | | | | |
| | SLC2 | Y | N | N | N |700/SLC2 only |
|66G3222 |240MB HDD Kit | | | | | |
| | SLC2 | N | Y | N | N |700C/SLC2 only |
'--------+----------------+-----+-----+-----+-----+---------------'
.--------------------------------------------------------------.
|EXISTING OPTIONS |
|--------+----------------+-----+-----+-----+-----+------------|
|49G2173 |Security | | | | | |
| | Diskette | Y | Y | Y | Y | |
|54G0133 |120MB HDD | Y | Y | Y | Y | |
'--------+----------------+-----+-----+-----+-----+------------'
.--------------------------------------------------------------.
|240MB INTERCHANGEABILITY |
|---------------------+--------+----------+---------+----------|
| | 80MB | 120MB | 160MB | 240MB |
|System Unit + Option | HDD | HDD | HDD | HDD |
|720C + 240MB HDD | SYS | SYS | SYS | OK |
|720 + 240MB HDD | SYS | SYS | SYS | OK |
|720C | OK | OK | OK | UPG |
|720 | OK | OK | OK | UPG |
|700C + 240MB HDD | SYS | SYS | SYS | OK |
|700 + 240MB HDD | SYS | SYS | SYS | OK |
|700C + DC + 240MB HDD| SYS | SYS | SYS | OK |
|700 + DC + 240MB HDD | SYS | SYS | SYS | OK |
|700C | OK | OK | OK | UPG |
|700 | OK | OK | OK | UPG |
|700C + DC | OK | OK | OK | UPG |
|700 + DC | OK | OK | OK | UPG |
|---------------------+--------+----------+---------+----------|
|DC -- Double clock upgrade installed
|SYS -- System partition must be updated with reference diskette
|UPG -- Upgrade kit installation is required
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