
Cisc-8
nailed-barnacle/Cisc-8-ttl-processor
A cut-down version of the 8080 processor using HCTTL and including a discrete ALU and instruction decoder

A simple computer on M68k
Motherboard is an open-source printed circuit board by aversey, from the aversey/suen repository on GitHub. It is a 2-layer board of 194.3 × 174 mm with 99 parts on 204 nets, routed with 4,427 tracks and 870 vias.
It is built around the 74HCT245, 74HC245D and 74HC08D, with the 74HC27D, 74HC10D and 74HC00D among its other parts. Its parts include 40 capacitors, 28 ICs, 10 resistors, 10 connectors and 2 diodes. It belongs with the computers and single-board computers boards of this library.
This board is the first implementation of SUEN architecture.
SUEN archictecture was created by Nikita Orlov and Aleksey Veresov for research and educational purposes.
Board schematic was created with KiCad program complex.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 36 | 0.1uF | Capacitor_THT:C_Rect_L7.0mm_W4.5mm_P5.00mm | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +20 |
| 7 | 4.7KOhm | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R1, R2, R3, R4, R5, R7, R8 |
| 6 | 74HCT245 | Package_DIP:DIP-20_W7.62mm_Socket | U5, U6, U14, U15, U20, U24 |
| 4 | 4.7KOhm | Resistor_THT:R_Array_SIP9 | RN1, RN2, RN3, RN4 |
| 4 | Conn_01x01 | plugins:HOLE_SUEN | HOLE1, HOLE2, HOLE3, HOLE4 |
| 4 | Conn_02x24_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x24_P2.54mm_Vertical | J2, J3, J4, J5 |
| 3 | 74HC08 | Package_DIP:DIP-14_W7.62mm_Socket | U17, U18, U19 |
| 3 | 74HC27 | Package_DIP:DIP-14_W7.62mm_Socket | U11, U12, U13 |
| 2 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C36, C37 |
| 2 | 10uF | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C34, C40 |
| 2 | 28C256 | Package_DIP:DIP-28_W15.24mm_Socket | U10, U16 |
| 2 | 74HC10 | Package_DIP:DIP-14_W7.62mm_Socket | U8, U9 |
| 2 | 74HC245 | Package_DIP:DIP-20_W7.62mm_Socket | U21, U25 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J9, J10 |
| 1 | 10KOhm | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R9 |
| 1 | 1KOhm | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R6 |
| 1 | 470Ohm | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R10 |
| 1 | 68000D | Package_DIP:DIP-64_W22.86mm_Socket | U1 |
| 1 | 74HC00 | Package_DIP:DIP-14_W7.62mm_Socket | U3 |
| 1 | 74HC02 | Package_DIP:DIP-14_W7.62mm_Socket | U2 |
| 1 | 74HC04 | Package_DIP:DIP-14_W7.62mm_Socket | U7 |
| 1 | 74HC05 | Package_DIP:DIP-14_W7.62mm_Socket | U22 |
| 1 | 74HC138 | Package_DIP:DIP-16_W7.62mm_Socket | U23 |
| 1 | 74HC164 | Package_DIP:DIP-14_W7.62mm_Socket | U26 |
| 1 | 74HC32 | Package_DIP:DIP-14_W7.62mm_Socket | U4 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_Horizontal | J8 |
| 1 | CXO_DIP8 | Oscillator:Oscillator_DIP-8 | X1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | Conn_02x08_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J6 |
| 1 | Conn_02x26_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x26_P2.54mm_Vertical | J1 |
| 1 | D | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U28 |
| 1 | LED | LED_THT:LED_D5.0mm | D2 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm_Socket | U27 |
It measures 194.3 × 174 mm and has 2 copper layers, 1.6 mm thick.
99 parts, built around the 74HCT245, 74HC245D, 74HC08D and 74HC27D. 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.
From the aversey/suen repository on GitHub, at the commit this page was made from: the board is motherboard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask aversey before reusing the design.

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