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Qi 900 Scorpion Planar
CMOS Discharge
FTs Scorpion Planar
CMOS Discharge
Switch Settings
CMOS Discharge
System Firmware
ROM Images
BIOS Revision Levels
Information sourced from Mitsubishi Electric's Insight CD page.
Qi 900 Scorpion Planar
Planar Revision History.
CMOS Discharge
To drain CMOS remove the battery and wait approx. 20 minutes to drain.
FTs Scorpion Planar
Planar Revision History.
CMOS Discharge
To remove settings in CMOS the ribbon cable running from the Front Panel to
the I/O Board should be disconnected and then left for approx. 20 minutes.
Switch Settings
SW1
| Pos. |
Second Floppy |
| A |
5.25" |
| B |
3.5" |
SW2
| Pos. |
Second Floppy |
| A |
Present |
| B |
Not present |
SW3
| Pos. |
On |
Off |
| 1 |
Pipeline 386 enable |
Pipeline 386 disable |
| 2 |
Pipeline 385 enable |
Pipeline 385 disable |
| 3 |
ROM's disabled |
ROM's enabled |
| 4 |
Refresh enabled |
Refresh disabled |
SW4
| Pos. |
On |
Off |
| 1 |
RAM configuration |
| 2 |
RAM configuration |
| 3 |
RAM configuration |
| 4 |
CPU speed select |
| 5 |
CPU speed select |
| 6 |
Not currently used |
| 7 |
Weitek present * |
Weitek not present |
| 8 |
Titan backplane |
No Titan |
* PAL required to enable
RAM Configuration
| Memory Fitted |
SW4 Position |
SIMM Capacity |
| 1 |
2 |
3 |
Bank 0 |
Bank 1 |
| 1 MByte |
Off |
Off |
Off |
256k |
- |
| 1 MByte |
On |
Off |
Off |
256k |
- |
| 2 MByte |
Off |
On |
Off |
256k |
256k |
| 4 MByte |
Off |
Off |
On |
1 M |
- |
| 5 MByte |
On |
On |
Off |
256k |
1 M |
| 8 MByte |
On |
Off |
On |
1 M |
1 M |
| 12 MByte |
Off |
On |
On |
2 M |
1 M |
| 16 MByte |
On |
On |
On |
2 M |
2 M |
Clock Speed
| CPU speed MHz |
SW4 Position |
| 4 |
5 |
| 25 |
Off |
On |
SW5
System Firmware (POST & BIOS)
Firmware stored in EPROM (2x 64 KB).
ROM Images
qi910224.zip - Qi 900 ROM BIOS 1.02.24 (LO+HI, zipped)
fts10226.zip - FTs Scorpion 1.02.26 (LO+HI, zipped)
BIOS Revision Levels
Qi 900 BIOS Revision Summary (ver. 1.02.18 - 1.02.25I)
FTs BIOS Revision Summary (ver. 1.02.23 - 1.02.26)
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