RAMROM Board v3
About the RAMROM Board v3
RAMROM Board v3 is an open source PCB design by roberto314, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 38 components from 17 distinct parts.
Other key parts include the SN74LVC245ANSR, 74HC14, IS61C5128AL-10TLI, IS63WV1288DBLL-10xLI and 74LVC253. By type, the board carries 10 ICs, 9 connectors, 9 capacitors, 8 resistors, 1 battery holder and 1 diode.
It belongs with the retro computing designs in this gallery.
From the project
A modular 8-bit Computer able to recreate (nearly) every Retro computer of the late 70s to mid 80s.
A modular 8-bit Computer able to recreate (nearly) every microcomputer of the mid 70s to early 80s in Hardware without FPGAs (although an FPGA can be added). Can also be used as a teaching tool for:
VHDL or Verilog C RTOS (STM32F401 runs ChibiOS Link: https://www.chibios.org) Python bash and linux in general (Olimex board runs linux with fbterm and tmux) Harwaredesign Timing of CPUs maybe Assembler SPI and I2C Interfaces CPLDs and FPGAs
Main components on the RAMROM Board v3
RAMROM Board v3 bill of materials (BOM)
38 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SN74LVC245ANSR | SO-20_5.3x12.6mm_P1.27mm | U1 |
| 1 | 74HC14 | DIP-14_W7.62mm_Socket | U2 |
| 2 | IS61C5128AL-10TLI | TSOP-II-44_10.16x18.41mm_P0.8mm | U3, U4 |
| 1 | IS63WV1288DBLL-10xLI | TSOP-II-32_21.0x10.2mm_P1.27mm | U5 |
| 1 | 74LVC253 | SO-16_3.9x9.9mm_P1.27mm | U6 |
| 1 | 74LVC595 | SO-16_3.9x9.9mm_P1.27mm | U7 |
| 2 | 74AHC1G14 | SOT-23-5 | U8, U11 |
| 1 | 74LS08 | SOIC-14_3.9x8.7mm_P1.27mm | U21 |
| 4 | BUS | PinSocket_2x20_P2.54mm_Vertical | J1, J2, J3, J4 |
| 1 | . | PinHeader_1x01_P2.00mm_Vertical | J8 |
| 2 | . | PinHeader_1x06_P2.54mm_Vertical | J10, J11 |
| 2 | Conn_01x12 | PinHeader_1x12_P2.54mm_Vertical | J20, J21 |
| 1 | Battery_Cell | BatteryHolder_Keystone_103_1x20mm | BT1 |
| 1 | BAT54C | SOT-23 | D2 |
| 9 | 100n | C_1206_3216Metric | C1, C2, C3, C4, C5, C7, C8, C9 +1 |
| 5 | 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R7, R8, R9, R10 |
| 3 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3, R4 |
RAMROM Board v3 design files
The KiCad project lives in the roberto314/Unicomp2 repository on GitHub; these links point at the commit this page was built from.
RAMROM Board v3: common questions
How big is the RAMROM Board v3?
The RAMROM Board v3 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RAMROM Board v3?
38 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the RAMROM Board v3 design files?
From the roberto314/Unicomp2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the RAMROM Board v3 design in my own project?
The repository has no license, so all rights stay with roberto314. Use it as a reference, and ask the author before reusing the design.
More boards in Unicomp2
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STM32RAMROM 512k board
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100 × 100 mm52 parts2LNo license1
UC2 synertek KTM2
100 × 100 mm48 parts2LNo license1
STM32Cpld board max2
100 × 100 mm46 parts2LNo license1
Zilog MultiSerial
100 × 100 mm42 parts2LNo license1
STM32RAMROM CPLD board
100 × 100 mm42 parts2LNo license1
STM32RAMROM 128k board
100 × 100 mm42 parts2LNo license1
STM32Fill Memory Board
100 × 100 mm39 parts2LNo license1
Empty board w mapping ram2
100 × 100 mm23 parts2LNo license1
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