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3540st.exe 8535/8540 Starter Disk v1.03 (zipped image)
953540st.exe 9535/9540 Starter Disk v1.00 (zipped image)
25sxstr.exe Models 25 SX, 35, 40 Advanced Diagnostics v1.30 (zipped image)
253540dg.exe Models 25 SX, 35, 40 Advanced Diagnostics v1.20 (zipped image)
40sxdiag.tg0 Model 40SX Advanced Diagnostics v1.02 (zipped image)
191-075 IBM PS/2 Model 35 SX (8535-040, 043), IBM PS/2 Model 35 LS (8535-24X)
191-199 IBM PS/2 Model 35 LS (8535-14X)
191-076 IBM PS/2 Model 40 SX (8540-040, 043, 045)
SHS84F9845 IBM PS/2 Model 35 SX, 35 LS, 35 SLC HMR
SHS84F9846 IBM PS/2 Model 35 SX, 35 LS, 35 SLC HMS
SHS84F7767 IBM PS/2 Model 40 SX and 40 SLC HMS
SHS84F7768 IBM PS/2 Model 40 SX and 40 SLC HMR
8535/8540 Planar
Riser Card
System Firmware
ROM Images
8535/8540 Planar FRU P/N 92F0140, P/N 10G3804
![[P]](/other/img/photo.gif "Front")
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FRU P/N 85F0077, P/N 10G3804
F3 Keyboard / Mouse fuse
J1 Mouse port
J2 Keyboard port
J3 Parallel port
J4 DB25 serial port
J5 HDD15 video connector
J6-8 72-pin SIMM socket
J9 Bus riser slot
J10 IRQ5/IRQ7 jumper
J11 Power-supply connector P1
J12 Control-assembly connector
J13 Power-supply connector P2
J14 Password-override jumper
J15 40-pin floppy connector
J16 40-pin IDE connector
LN1 Pads for filter
OS1 25 MHz osc
OS2 Pads for osc "Spare"
OS3 41.5390 MHz osc (VGA)
OS4 28.322 MHz osc (VGA)
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OS5 40.0000 MHz osc
OS6 48.0000 MHz osc
U6,13,39,42,54 "Spare"
U7 VLSI VL16C451A-QC Parallel/UART
U10 Intel P8042AH K/B controller
U11 VLSI VL82C300-FCP
U12,34 VLSI VL82C304-QC
U16 Inmos IMSG171P-50 RAMDAC
U17 Dallas DS1287 RTC/CMOS
U18 84F7985 SVGA
U19 Even ROM BIOS
U28,30 64Kx16? DRAM (video)
U29 i387SX co-pro socket
U31 Odd ROM BIOS
U35,36 Pads for additional DRAM (video)
U38 84F9287 OKI M7U100-019
U40 64F3110 TI CF61533FN
U50 i80386SX-20 (or IBM 386SLC-20?) CPU
U52 82077AA Floppy controller
Y1 14.3 MHz xtal
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Riser Card
Three (8535) or five (8540) 16-bit ISA slots.
No other significant components on the riser aside from some passives.
(U1?)
System Firmware (POST & BIOS)
Firmware stored in EPROM.
ROM Images
92F1502 / 92F1503 - 04 Apr 1991, rev. 6, 2x 27C512 (U19 / U31)
04G2022 / 04G2021 - 25 Sep 1991, rev. 10, 2x 27C512 (U19 / U31)
| ![[P]](Planar_Photo_Front.jpg "Front"){kind=small}
![[P]](Planar_Photo_Back.jpg "Back"){kind=small}
![[P]](Riser_Photo_Front.jpg "Front"){kind=small}
![[P]](Riser_Photo_Back.jpg "Back"){kind=small}