TRS-80-Model-I-Jap50-E1

RetroStack·TRS-80-Model-I-Jap50-E1·KiCAD/TRS80_Model_I_Jap50_E1.kicad_pcb

About the TRS-80-Model-I-Jap50-E1 PCB

TRS-80-Model-I-Jap50-E1 is an open source PCB design by RetroStack, published on GitHub under the MIT license. It is a 2-layer board measuring 407 × 184 mm, with 253 components from 106 distinct parts.

By type, the board carries 80 resistors, 68 capacitors, 10 jumpers, 6 transistors, 6 connectors and 2 switches.

From the project

Hardware Replica of the TRS-80 Model I Revision HE11E011550

This project is a faithful reimplementation of the mainboard of the iconic TRS-80 Model 1 (Revision HE11E011550) computer, redesigned and produced in Japan later in its existance. My own revision is designed to replicate the original system's functionality by using a PCB design 1-to-1 to the original, including components, interfaces, and even traces. The entire project is available under the MIT license.

TRS-80-Model-I-Jap50-E1, from the project README — From the project README

TRS-80-Model-I-Jap50-E1 bill of materials (BOM)

253 components, 106 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	C1815	TRS80_Model_I_Q_Circle_ECB_Jap	Q1
2	A1015	TRS80_Model_I_Q_Circle_ECB_Jap	Q2, Q5
1	TIP29A	TRS80_Model_I_Q_Box_BCE_Jap	Q3
1	2N6594	TRS80_Model_I_Q_Heatsink_Large_BEC_Jap	Q4
1	MJE34	TRS80_Model_I_Q_Heatsink_Small_BCE_Jap	Q6
1	10.6445 MHz	TRS80_Model_I_Crystal_Jap	Y1
1	Connection Mainboard Side	TRS80_Model_I_Keyboard_Connector_Jap	CN1
1	Conn_01x09	TRS80_Model_I_Keyboard_Connector_Small_Jap	CN2
3	Front View	TRS80_Model_I_DIN5_Jap	J1, J2, J3
1	Edge Connector	TRS80_Model_I_Edge_Connector_Jap	J4
1	MDA202	TRS80_Model_I_D_Bridge_Jap	CR1
1	1N4735	TRS80_Model_I_D_Zener_Long_Jap	CR2
1	1N5231	TRS80_Model_I_D_Zener_Jap	CR3
5	1N4148	TRS80_Model_I_D_Jap	CR4, CR5, CR6, CR7, CR8
4	TRS80_Model_I_Jumper_2_Jap	TRS80_Model_I_Jumper_2_Open_Jap	JP1, JP2, JP3, JP9
2	TRS80_Model_I_Jumper_3_Jap	TRS80_Model_I_Jumper_3_Open_Jap	JP4, JP8
1	TRS80_Model_I_Jumper_3_Jap	TRS80_Model_I_Jumper_3_Open_HFlipped_Jap	JP5
2	TRS80_Model_I_Jumper_3_Jap	TRS80_Model_I_Jumper_3_Open_HFlipped_VFlipped_Jap	JP6, JP7
1	TRS80_Model_I_Jumper_3_Jap	TRS80_Model_I_Jumper_3_Open_HFlipped_Big_Jap	JP10
1	Relay_SPDT	TRS80_Model_I_Relay_Jap	K1

Show 86 more

Qty	Part	Footprint	Refs
2	4.7K 4.7k	TRS80_Model_I_R_Array_09_Jap	RP1, RP2
1	~	TRS80_Model_I_Sw_Large_Jap	S1
1	Reset	TRS80_Model_I_Sw_Small_Jap	S2
1	~	TRS80_Model_I_TestPoints	TP1
2	LM723C	TRS80_Model_I_DIP14_Jap	Z1, Z2
1	75452	TRS80_Model_I_DIP8_Jap	Z3
2	74LS175	TRS80_Model_I_DIP16_Jap	Z4, Z56
1	74LS10	TRS80_Model_I_DIP14_Jap	Z5
2	74LS92	TRS80_Model_I_DIP14_Jap	Z6, Z65
4	74LS93	TRS80_Model_I_DIP14_Jap	Z7, Z28, Z34, Z35
6	74LS157	TRS80_Model_I_DIP16_Jap	Z8, Z13, Z14, Z27, Z29, Z36
2	2114 SRAM_2114	TRS80_Model_I_DIP18_Jap	Z9, Z10
1	74LS174	TRS80_Model_I_DIP16_Jap	Z11
2	74LS245	TRS80_Model_I_DIP20_Jap	Z12, Z23
8	4116 DRAM_4116	TRS80_Model_I_DIP16_Jap	Z15, Z16, Z17, Z18, Z19, Z20, Z21, Z22
4	74LS367	TRS80_Model_I_DIP16_Jap	Z24, Z30, Z59, Z66
1	LM3900	TRS80_Model_I_DIP14_Jap	Z25
1	74LS14	TRS80_Model_I_DIP14_Jap	Z26
2	74LS132	TRS80_Model_I_DIP14_Jap	Z31, Z47
1	74C00	TRS80_Model_I_DIP14_Jap	Z32
2	74LS04	TRS80_Model_I_DIP14_Jap	Z33, Z46
2	MCM6670	TRS80_Model_I_DIP18_Jap	Z37, Z38
1	74LS153	TRS80_Model_I_DIP16_Jap	Z39
3	74LS32	TRS80_Model_I_DIP14_Jap	Z40, Z64, Z67
1	74LS30	TRS80_Model_I_DIP14_Jap	Z41
1	2364_20L	TRS80_Model_I_DIP24_Jap	Z42
1	2332_20L_21L	TRS80_Model_I_DIP24_Jap	Z43
1	74LS00	TRS80_Model_I_DIP14_Jap	Z44
2	74LS02	TRS80_Model_I_DIP14_Jap	Z45, Z54
1	Z80CPU	TRS80_Model_I_DIP40_Jap	Z48
2	74LS244	TRS80_Model_I_DIP20_Jap	Z49, Z68
1	7404	TRS80_Model_I_DIP14_Jap	Z50
2	74LS08	TRS80_Model_I_DIP14_Jap	Z51, Z52
3	74LS74	TRS80_Model_I_DIP14_Jap	Z53, Z62, Z63
1	74LS20	TRS80_Model_I_DIP14_Jap	Z55
2	74LS166	TRS80_Model_I_DIP16_Jap	Z57, Z58
1	74LS11	TRS80_Model_I_DIP14_Jap	Z60
1	74LS139	TRS80_Model_I_DIP16_Jap	Z61
6	10uF 16V	TRS80_Model_I_C_Pol_Radial_5D_2.5P_Jap	C1, C4, C6, C12, C14, C40
40	0.1uF 12V	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C2, C8, C20, C22, C23, C24, C25, C26 +32
4	0.01uF 24V	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C3, C7, C13, C15
1	220uF 16V	TRS80_Model_I_C_Pol_Radial_10D_5P_Jap	C5
1	2200uF 35V	TRS80_Model_I_C_Pol_Axial_41L_19W_48P_Jap	C9
1	10000uF 16V	TRS80_Model_I_C_Pol_Axial_63L_25W_71P_Jap	C10
3	1NF 1nF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Small_Jap	C11, C16, C57
2	220PF 220pF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C17, C18
1	100uF 16V	TRS80_Model_I_C_Pol_Radial_10D_5P_Jap	C19
4	0.1uF 25V	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C27, C30, C33, C36
1	100PF 100pF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Small_Jap	C43
1	1NF 1nF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C48
1	2.7NF 2.7nF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C50
1	47PF 47pF	TRS80_Model_I_C_Disc_9.5L_4W_6P_Jap	C60
1	22uF 16V	TRS80_Model_I_C_Pol_Radial_5D_2.5P_Jap	C70
2	100	TRS80_Model_I_R_0.25W_Jap	R1, R32
4	1.2K 1.2k	TRS80_Model_I_R_0.25W_Jap	R2, R18, R19, R28
2	7.5K 7.5k	TRS80_Model_I_R_0.25W_Jap	R3, R4
1	220K 220k	TRS80_Model_I_R_0.25W_Jap	R5
1	75	TRS80_Model_I_R_0.25W_Jap	R6
1	47	TRS80_Model_I_R_0.25W_Jap	R7
12	330	TRS80_Model_I_R_0.25W_Jap	R8, R75, R101, R102, R103, R104, R105, R106 +4
1	120	TRS80_Model_I_R_0.25W_Jap	R9
1	270	TRS80_Model_I_R_0.25W_Jap	R10
4	10K 10k	TRS80_Model_I_R_0.25W_Jap	R11, R31, R34, R49
2	220	TRS80_Model_I_R_0.5W_Jap	R12, R37
1	68	TRS80_Model_I_R_0.5W_Jap	R13
1	2.7K 2.7k	TRS80_Model_I_R_0.25W_Jap	R14
1	750	TRS80_Model_I_R_0.25W_Jap	R15
1	0.33	TRS80_Model_I_R_2W_Jap	R16
2	1k	TRS80_Model_I_R_Pot_Jap	R17, R23
1	100K 100k	TRS80_Model_I_R_0.25W_Jap	R20
3	3.3K 3.3k	TRS80_Model_I_R_0.25W_Jap	R21, R24, R25
1	1.5K 1.5k	TRS80_Model_I_R_0.25W_Jap	R22
1	2.2K 2.2k	TRS80_Model_I_R_0.25W_Jap	R26
1	12K 12k	TRS80_Model_I_R_0.25W_Jap	R27
1	2k	TRS80_Model_I_R_0.25W_Jap	R29
1	5.6	TRS80_Model_I_R_3W_Jap	R30
2	1M	TRS80_Model_I_R_0.25W_Jap	R33, R51
1	680K 680k	TRS80_Model_I_R_0.25W_Jap	R35
1	1.8M	TRS80_Model_I_R_0.25W_Jap	R36
2	360K 360k	TRS80_Model_I_R_0.25W_Jap	R38, R42
1	10	TRS80_Model_I_R_0.25W_Jap	R39
17	4.7K 4.7k	TRS80_Model_I_R_0.25W_Jap	R40, R41, R48, R54, R55, R64, R65, R66 +9
1	560K 560k	TRS80_Model_I_R_0.25W_Jap	R43
5	470K 470k	TRS80_Model_I_R_0.25W_Jap	R44, R45, R46, R47, R50
2	8.2K 8.2k	TRS80_Model_I_R_0.25W_Jap	R52, R53
2	910	TRS80_Model_I_R_0.25W_Jap	R56, R57

TRS-80-Model-I-Jap50-E1 design files

The KiCad project lives in the RetroStack/TRS-80-Model-I-Jap50-E1 repository on GitHub; these links point at the commit this page was built from.

LayoutKiCAD/TRS80_Model_I_Jap50_E1.kicad_pcb
SchematicKiCAD/TRS80_Model_I_Jap50_E1.kicad_sch
BOMLatest/TRS80_Model_I_Jap50_E1_BOM.csv

TRS-80-Model-I-Jap50-E1: common questions

How big is the TRS-80-Model-I-Jap50-E1 PCB?

The TRS-80-Model-I-Jap50-E1 measures 407 × 184 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TRS-80-Model-I-Jap50-E1?

253 components, from 106 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 TRS-80-Model-I-Jap50-E1 design files?

From the RetroStack/TRS-80-Model-I-Jap50-E1 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the TRS-80-Model-I-Jap50-E1 design in my own project?

Yes, under the terms of its MIT license, which RetroStack chose for the repository.