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Reply 55 Turboboard
Also called Model 55 486SLC2 System Board Upgrade
193-313
IBM Planar Upgrades For PS/2 Models 50, 50Z, 55 SX And
LS
rf5055pu.exe
PS/2 8550/50Z/55 planar upgrade refdisk v1.01
Please tell
me of repressed memories about this planar!
"CD-ROM connector" is errata, that is the normal 55 bus
riser.
Reply 55 Turboboard Image
(thanks to nyce-distribution)
I need to review the image and pull out chip IDs.
F1
Fuse
J1 Mouse
J2 Keyboard
J3 Parallel
J4 Serial
J5 Video
J7 Solder pads
J9 Solder pads
J8 12 pin
header
J10 Solder
pads
J11 Password
Override
J12 4 pin
power
J14 IDE
J15 floppy
J17 solder
pads
M1,2,3 SIMM
sockets
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U3 22.1184 MHz osc
U7 LT1141CS
U9 14.3181 MHz
osc
U11
CL-GD5426-80QC
U12 10G4672
U18 Dallas
DS1387
U19, 20
KM416C256AJ-7
U21, 22 solder
pads
U29 N82077SL
U47 PLCC
02N3251 G1.04
U48 96F7690
U49 50G6950
IBM 486SLC2
U61 50.0000MHz
osc
U63 PLCC
socket upgrade cpu?
Y1 ? xtal
0
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CPU- 486SLC2 25/50 Copro 387SX
Max Memory on board 16MB 2, 4, or 8MB, 70nS
parity
Three SIMM Sockets, 70ns, 80ns and 85ns memory SIMMs
Three 16-bit MCA slots (includes one AVE)
Video Controller CL-GD5426-80QC
Video Memory- 1MB DRAM (2 SOJ)
640x480, 16M: 24 bits/pixel
800x600, 64K: 16 bits/pixel
1,024x768, 256: 8 bits/pixel
Parallel: One enhanced, bi-di with DMA support/
Serial - one enhanced with DMA support
HD Support AT/IDE and existing drive
Floppy controller supports 1.44 and 2.88MB
floppies
Clock/calendar integrated CMOS battery
9595 Main
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