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S100 80386 SRAM V6

CatspersCoffee·S100-Boards·x86-Memory-Adapter/adapter/s100_80386 SRAM V6.kicad_pcb

S100 80386 SRAM V6 PCB layout, top view — open source board by CatspersCoffee

About the S100 80386 SRAM V6 PCB

S100 80386 SRAM V6 is an open source PCB design by CatspersCoffee, published on GitHub under the Custom license license. It is a board measuring 254 × 134.6 mm, with 98 components from 42 distinct parts.

Other key parts include the LDO_REG_7805, 74LVC573, LM1086CS_TO252_DPAK, 74F14 and 74LVX3245. By type, the board carries 34 capacitors, 19 resistors, 18 ICs, 16 connectors, 5 diodes and 3 jumpers.

It belongs with the retro computing designs in this gallery.

From the project

S-100 bus boards designed and built: Z80 and 80386 CPU cards, SRAM/DRAM memory, CPLD/FPGA I/O and SPI boards, an 18-slot backplane and bus terminator. KiCad designs with Xilinx XC9500 CPLD and Spartan-6 FPGA logic, with the original design history replayed in git.

Two boards from 2015–2016: - "x86 32bit Memory Adapter Board": an S-100-size card that connects the 80386 CPU board to a 32-bit, 3.3 V memory mezzanine. - "4Mbit (128K x 32)": an SRAM module for that mezzanine slot.

- Size: 254.00 × 134.62 mm, 2 layers. - Jumpers and headers (silkscreen names): - LT3081 Output Voltage Selector (P13): 5.0 / 3.3 / 2.5 / 1.8 / 1.5 / 1.2 V. - 3.3V (K1): takes 3.3 V from the LM1086 or the LT3081. - 5.0V (K2): takes 5 V from the LM7805 or the LT3081. - JTAG Chain (P12): "2-4 CPLD only, 1-2 & 3-4 CPLD + FPGA". The second setting adds the mezzanine's device to the…

S100 80386 SRAM V6, from the project README
From the project README

Main components on the S100 80386 SRAM V6

LDO_REG_780574LVC573LM1086CS_TO252_DPAK74F1474LVX3245XC9572XL-VQ44ZZZZ174F04LM2596LT3081

S100 80386 SRAM V6 bill of materials (BOM)

98 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LDO_REG_7805
U1
5
74LVC573
U2, U3, U4, U5, U6
1
LM1086CS_TO252_DPAK
U7
1
74F14
U8
5
74LVX3245
U9, U10, U11, U12, U13
1
XC9572XL-VQ44
U14
1
ZZZZ1
U15
1
74F04
U17
1
LM2596
U19
1
LT3081
U20
6
CONN_1
P1, P2, P3, P4, P34, P35
3
CONN_20X2
P5, P8, P9
1
CONN_25X2
P6
1
XILINX CABLE2
P7
1
CPLD Spare
P10
1
CONN_2X2
P11
1
JTAG CHAIN
P12
1
LT Output select
P13
1
S100_MALE
P20
3
JUMPER
JP5, JP6, JP7
Show 22 more
QtyPartRefs
1
3.3V
K1
1
5V
K2
1
POWER
D1
3
LED
D2, D5, D6
1
SMALL_DIODE_SCHOTTKY
D3
1
SMALL_INDUCTANCE
L1
19
0.1 uF
C1, C3, C4, C6, C7, C8, C9, C10 +11
15
10 uF
C12, C15, C16, C18, C20, C21, C23, C24 +7
4
330
R1, R5, R6, R8
3
100
R2, R3, R4
1
4.53k
R7
1
500
R10
1
24.3K
R11
1
36.5K
R12
1
66.5K
R13
1
1K
R14
1
30.1K
R15
1
49.9K
R16
1
100K
R17
1
300
R18
1
470
R24
1
VR1
VR1

S100 80386 SRAM V6 design files

The KiCad project lives in the CatspersCoffee/S100-Boards repository on GitHub; these links point at the commit this page was built from.

S100 80386 SRAM V6: common questions

How big is the S100 80386 SRAM V6 PCB?

The S100 80386 SRAM V6 measures 254 × 134.6 mm and is 1.6002 mm thick.

How many components are on the S100 80386 SRAM V6?

98 components, from 42 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the S100 80386 SRAM V6 design files?

From the CatspersCoffee/S100-Boards repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the S100 80386 SRAM V6 design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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