2 layers364 × 203 mm
2 layers364 × 203 mm
CPU6S
Meisaka/CenMiniCom8Centurion Minicomputer Schematics
- Size
- 364 × 203 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 240
- Nets
- 661
- Pads
- 2,718
- Tracks, vias
- 12,724, 1,331
- Pours
- 30
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 14 May 2022
- Updated
- 1 Jun 2023
Overview
CPU6S is an open-source printed circuit board by Meisaka, from the Meisaka/CenMiniCom repository on GitHub. It is a 2-layer board of 364 × 203 mm with 240 parts on 661 nets, routed with 12,724 tracks and 1,331 vias.
It is built around the 74LS384N, AM2901CDC and 74LS240DC, with the 74LS373SC, 74LS377PC and 74LS00SC among its other parts. Its parts include 71 capacitors, 21 resistors and 9 connectors.
Main components
1274LS384N
-- Digital Signal Processors (DSP/DSC) ROHSRochester Electronics, LLCDigital Signal Processors (DSP/DSC)AM2901CDC
CDIP-40Others CDIP-40 Microcontrollers (MCU/MPU/SOC)AMDMicrocontrollers (MCU/MPU/SOC)74LS240DC
--55℃~+125℃ 1 15mA 18ns@5V,45pF 24mA 29mA 4.75V~5.25V 74LS Output enable Schmitt trigger Tri-State - Buffers, Drivers, Receivers, TransceiversTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74LS373SC
--55℃~+125℃ 1 2.6mA 24mA 38ns@5V,150pF 4.75V~5.25V 74LS 8 Output enable Tri-State - Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74LS377PC
PDIP-200℃~+70℃ 1 10ns 25ns@5V,15pF 28mA 30MHz 4.75V~5.25V 400uA 5ns 74LS Series 8 8mA D-Type Rising Edge Synchronous PDIP-20 Flip Flops ROHSTexas InstrumentsFlip Flops
74LS00SC
-0℃~+70℃ 15ns@5V,50pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA NAND Gate - Logic Gates ROHSTexas InstrumentsLogic Gates
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
74LS157PC
PDIP-160℃~+70℃ 4.75V~5.25V Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders74LS74PC
DIP-140ns 0℃~+70℃ 1 2 20MHz 3.5pF 35ns@5V,50pF 4.5ns 4.75V~5.25V 400uA 74LS Series 8mA 8mA Asynchronous Complementary D-Type Rising Edge Set and Reset DIP-14 Flip FlopsTexas InstrumentsFlip Flops74LS02PC
DIP-140℃~+70℃ 15ns@5V,15pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA 8mA NOR Gate DIP-14 Logic Gates ROHSonsemiLogic Gates74LS153DC
PDIP-160℃~+70℃ 14ns 4.75V~5.25V 400uA 400uA 6.2mA 74LS Single Supply Tri-state output PDIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
74LS174DC
-0ns 0℃~+70℃ 1 16mA 20ns 30MHz 30ns@5V,15pF 4.75V~5.25V 400uA 6 74LS Series 8mA Asynchronous Push-Pull Reset Rising Edge - Flip Flops ROHSonsemiFlip Flops
README
README.mdVarious Schematics and Utilities for the Centurion Minicomputer
Schematics are reverse engineered from multiple hi-res images of the various cards.
IMPORTANT: Schematics are WIP and may contain mistakes or errors.
Utilities
Useful python3 scripts for investigating disk images
- arcscan.py - scan a raw disk image in the backup format.
- fsscan.py - scan a raw disk image with live file system.
- binstrip.py - clears the MSB of every octet in a file, to make searching for strings easier (outputs to a separate file)
Parts
240| Qty | Value | Footprint | References |
|---|---|---|---|
| 66 | 100nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +50 |
| 9 | 74LS669 | Package_DIP:DIP-16_W7.62mm | U_B1, U_B2, U_B5, U_B6, U_C1, U_C2, U_C5, U_C6, U_C15 |
| 8 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6, R9, R10, R11, R14, R17, RP10, RP11 |
| 8 | 74LS377 | Package_DIP:DIP-20_W7.62mm | U_C9, U_C13, U_F5, U_H5, U_J5, U_K5, U_L5, U_M5 |
| 8 | Fiducial_1.5mm_Mask4.5mm | Fiducial:Fiducial_1.5mm_Mask4.5mm | REF00, REF00, REF02, REF02, REF04, REF04, REF09, REF09 |
| 7 | 27C16/28C256 | Package_DIP_Custom:DIP-28_W15.24mm_Socket_LongPads | U_MWE2, U_MWF2, U_MWH2, U_MWJ2, U_MWK2, U_MWL2, U_MWM2 |
| 7 | 74LS00 | Package_DIP:DIP-14_W7.62mm | U_B12, U_D12, U_F14, U_K6, U_K10, U_L6, U_L14 |
| 7 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U_A3, U_A15, U_C8, U_C10, U_E12, U_E14, U_J6 |
| 7 | 74LS157 | Package_DIP:DIP-16_W7.62mm | U_B3, U_B4, U_C3, U_C4, U_C14, U_D6, U_L11 |
| 7 | 74LS240 | Package_DIP:DIP-20_W7.62mm_Socket | U_A4, U_A5, U_A6, U_A8, U_A9, U_A10, UB11 |
| 6 | 74LS240 | Package_DIP:DIP-20_W7.62mm | U_A7, U_M6, U_M7, U_M8, U_M14, U_M15 |
| 6 | 74LS74 | Package_DIP:DIP-14_W7.62mm | U_A1, U_B15, U_E15, U_F12, U_L10, U_M9 |
| 5 | 74LS138 | Package_DIP:DIP-16_W7.62mm | U_D3, U_E6, U_E7, U_H11, U_K11 |
| 4 | 2.5mm | MountingHole:MountingHole_2.5mm_Pad_TopBottom | MH1, MH2, MH3, MH4 |
| 4 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12, R13, R18, R19 |
| 4 | 74LS02 | Package_DIP:DIP-14_W7.62mm | U_C7, U_D10, U_E8, U_K12 |
| 4 | 74LS153 | Package_DIP:DIP-16_W7.62mm | U_F6, U_J12, U_J13, U_K13 |
| 4 | 74LS174 | Package_DIP:DIP-16_W7.62mm | U_D4, U_D5, U_E5, U_F13 |
| 4 | 74LS378 | Package_DIP:DIP-16_W7.62mm | U_D9, U_D11, U_J9, U_M12 |
| 4 | AM93L422 | Package_DIP:DIP-22_W10.16mm_Socket | U_B9, U_B10, U_D14, U_D15 |
| 3 | 2x8 Pin Socket | Connector_PinSocket_2.54mm:PinSocket_2x08_P2.54mm_Vertical | P4, P8, P10 |
| 3 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3 |
| 3 | 74LS10 | Package_DIP:DIP-14_W7.62mm | U_B11, U_E10, U_E11 |
| 3 | 74LS151 | Package_DIP:DIP-16_W7.62mm | U_J10, U_J11, U_K9 |
| 2 | 1000uF | Capacitor_THT:CP_Axial_L25.0mm_D10.0mm_P30.00mm_Horizontal | C52, C53 |
| 2 | 220/330 | Resistor_THT:R_Array_SIP10 | R4, RN16 |
| 2 | 22p | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C55, C56 |
| 2 | 2x13 Horizontal IDC Header | Connector_IDC:IDC-Header_2x13_P2.54mm_Horizontal | P2, P3 |
| 2 | 2x25 Pin Header | Connector_PinHeader_2.54mm:PinHeader_2x25_P2.54mm_Vertical | P5, P6 |
| 2 | 74LS20 | Package_DIP:DIP-14_W7.62mm | U_D8, U_H13 |
| 2 | 74LS259 | Package_DIP:DIP-16_W7.62mm | U_F11, U_M13 |
| 2 | 74LS30 | Package_DIP:DIP-14_W7.62mm | U_B7, U_B8 |
| 2 | 74LS37 | Package_DIP:DIP-14_W7.62mm | U_A13, U_M10 |
| 2 | 74LS374 | Package_DIP:DIP-20_W7.62mm | U_C11, U_D13 |
| 2 | 74LS38 | Package_DIP:DIP-14_W7.62mm | U_A2, U_A14 |
| 2 | AM2901 | Package_DIP:DIP-40_W15.24mm_Socket | U_F7, U_F9 |
| 2 | AM2909 | Package_DIP:DIP-28_W15.24mm_Socket | U_J7, U_K7 |
| 2 | SN74120 | Package_DIP:DIP-16_W7.62mm | U_D7, U_H12 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 1 | 15.000MHz | Crystal:Crystal_HC52-U_Horizontal | XTAL1 |
| 1 | 27C16 | Package_DIP:DIP-24_W15.24mm_Socket_LongPads | U_B13 |
| 1 | 2x7 Pin Socket | Connector_PinSocket_2.54mm:PinSocket_2x07_P2.54mm_Vertical | P7 |
| 1 | 4.7k | Resistor_THT:R_Array_SIP10 | R7 |
| 1 | 47 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 470uF | Capacitor_THT:C_Radial_D8.0mm_H7.0mm_P3.50mm | C39 |
| 1 | 74LS109 | Package_DIP:DIP-16_W7.62mm | U_L13 |
| 1 | 74LS139 | Package_DIP:DIP-16_W7.62mm | U_D2 |
| 1 | 74LS240/756 | Package_DIP:DIP-20_W7.62mm_Socket | UA12 |
| 1 | 74LS253 | Package_DIP:DIP-16_W7.62mm | U_H6 |
| 1 | 74LS368 | Package_DIP:DIP-16_W7.62mm | U_H14 |
| 1 | 74LS373 | Package_DIP:DIP-20_W7.62mm_Socket | UA11 |
| 1 | 74LS377 | Package_DIP:DIP-20_W7.62mm_Socket | UB12 |
| 1 | AM2911 | Package_DIP:DIP-20_W7.62mm_Socket | U_L9 |
| 1 | Conn_02x36_Top_Bottom | Connectors_Custom:BUS_EE200 | P1 |
| 1 | D | Diode_THT:D_A-405_P10.16mm_Horizontal | CR1 |
| 1 | Jumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP1 |
| 1 | SW_DIP_x08 | Button_Switch_THT:SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | DSW1 |
| 1 | VPP/4K | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP6 |
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Questions
How big is the CPU6S PCB?
It measures 364 × 203 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CPU6S use?
240 parts, built around the 74LS384N, AM2901CDC, 74LS240DC and 74LS373SC. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the CPU6S KiCad files?
From the Meisaka/CenMiniCom repository on GitHub, at the commit this page was made from: the board is CPU6S/CPU6S.kicad_pcb and its schematic CPU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CPU6S design in my own project?
Its repository states no licence, so its author keeps all rights: ask Meisaka before reusing the design.