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POWER Gt1 P/N 10G8658, FRU number 10G8659
J1 80-pin connector
J2 HDD15 video connector
JP1 Video mode select header
U1 Toshiba 10G8654
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U2-9,11,12 VRAM
U10 Toshiba 10G8656
U14 IBM 51F1819
Y1 4.00000 MHz osc
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Original image courtesy of Rick Ekblaw.
VRAM is Toshiba TC524258BZ-80 video RAM
Mono (2x in U11,U12 for 256KB) monochrome graphics only.
Greyscale (4x in U2-5 for 768KB) 16 gray shades or colors
Color (4x in U6-9 for 1280KB) 8-bit graphics (256 colors), max 1280x1024.
Video Connector Card P/N 10G8624, FRU unknown
This card connects between the planar and the POWER Gt1 video adapter
in the 7011-220. It has no components besides the unlabeled connectors.
GT1 and GT1B Video Card Settings
Note: The GT1B is the same
as the GT1, but the GT1B has only two display jumpers (0 and 1) which limits
the upper pixel frequency to 111 MHz. Display jumper 2 is permanently set
to 1.
JP1 Jumpers
Gt1/ Gt1B
______________________________________________________________________________
DISPLAY | JMP | SCREEN | Refresh | Hor Freq | Pixel Freq
TYPE | 0 1 2 | RESOLUTION | Freq (HZ) | (KHz) | (MHz)
__________________|_______|_____________|___________|__________|______________
8507 Mono | 1 1 1 | 1024 x 768 | 43.5 | 35.5 | 44.9
8508 Mono | 1 1 1 | 1280 x 1024 | 67 | 70.8 | 128
8514 Color | 1 1 1 | 1024 x 768 | 43.5 | 35.5 | 44.9
8515 Color | 1 1 1 | 1024 x 768 | 43.5 | 35.5 | 44.9
8517 Color | 1 1 1 | 1024 x 768 | 69.96 | 57.0 | 78
| 0 1 1 | 1280 x 1024 | 51.48 | 56.5 | 103
__________________|_______|_____________|___________|__________|______________
1091-51 Color | 1 1 1 | 1280 x 1024 | 72 | 75.8 | 128
5081-16 Color | 1 1 1 | 1280 x 1024 | 60 | 63.4 | 111
6091-16 Color | 1 1 1 | 1280 x 1024 | 60 | 63.4 | 111
| 0 1 1 | 1024 x 768 | 75.8 | 61.1 | 86
6091-19 Color | 1 1 1 | 1280 x 1024 | 60 | 63.4 | 111
| 1 1 0 | 1280 x 1024 | 67 | 70.8 | 120
6091-23 Color | 1 1 1 | 1280 x 1024 | 60 | 63.4 | 111
__________________|_______|_____________|___________|__________|______________
Other Display | 1 0 1 | 1280 x 1024 | 60 | 63.34 | 108
| 0 0 1 | 1024 x 768 | 60 | 48.8 | 64
| 0 0 0 | 1024 x 768 | 70.4 | 56.8 | 75
__________________|_______|_____________|___________|__________|______________
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