Apricot QI-300 motherboard Look-over and quick test (YouTube)
Jupiter Planar Rev. C
Jupiter Planar Rev. D
Jupiter Planar Rev. E
Jupiter Planar Rev. F
Switch Settings
RAM Configuration
CMOS Discharge
System Firmware
ROM Images
BIOS Revision Levels
Information sourced from Mitsubishi Electric's Insight CD pages.
Jupiter Planar Rev. C

Planar Revision History.
Jupiter Planar Rev. D

Planar Revision History.
Jupiter Planar Rev. E

Planar Revision History.
Jupiter Planar Rev. F

Planar Revision History.
Switch Settings
CPU Clock
CPU speed MHz |
Switch no ON |
20 (not used) |
1 |
16 |
2 |
12.5 |
3 |
10 |
4 |
Ethernet SW1
All ON |
BNC connector active |
All OFF |
D-type connector active |
RAM Configuration
1 or 2MB of On-Board Memory. To expand this further an expansion card must
be fitted in one of the slots.
On-Board |
Module |
Product Code |
Total |
1MB |
1MB |
XB48036 |
2MB |
1MB |
2MB |
XB48037 |
3MB |
1MB |
4MB |
XB48038 |
5MB |
CMOS Discharge
To drain CMOS remove battery and wait for approximately 20 minutes.
System Firmware (POST & BIOS)
Firmware stored in EPROM (2x 64 KB).
ROM Images
qi310223.zip - Qi 300 ROM BIOS 1.02.23 (LO+HI, zipped)
BIOS Revision Levels
BIOS Revision Summary (ver. 1.01.02 - 1.02.23)
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