2 layers85.4 × 64 mm
DaewooBackslotRAMExpansion
RBSC/Daewoo_CPC400_Upgrade
Upgrading Daewoo CPC-400/400S into MSX2/MSX2+
29 parts4
2 layers85.4 × 64 mm
DaewooBackslotFMPAC
RBSC/Daewoo_CPC400_Upgrade4Upgrading Daewoo CPC-400/400S into MSX2/MSX2+
- Size
- 85.4 × 64 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 55
- Nets
- 83
- Pads
- 243
- Tracks, vias
- 584, 106
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Apr 2026
- Updated
- 24 Apr 2026
Overview
DaewooBackslotFMPAC is an open-source printed circuit board by RBSC, from the RBSC/Daewoo_CPC400_Upgrade repository on GitHub. It is a 2-layer board of 85.4 × 64 mm with 55 parts on 83 nets, routed with 584 tracks and 106 vias.
It is built around the LM4558N and 78L05. Its parts include 19 capacitors, 19 resistors, 6 ICs and 1 connector.
Main components
2
LM4558N
DIP-8-22V~22V 0℃~+70℃ 15V~22V 1MHz 2 3.5mA 30mA 500nA 5nA 6mV 90dB DIP-8 Operational Amplifier ROHSHGSEMIOperational Amplifier
78L05
SOT-89-3-20℃~+120℃@(Tj) 1 1.7V 100mA 2mA 30V 40uV 49dB@(120Hz) 5V Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUMWVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric | C5, C7, C15, C16 |
| 4 | 170k | Resistor_SMD:R_0805_2012Metric | R1, R3, R16, R18 |
| 4 | 2.2k | Resistor_SMD:R_0805_2012Metric | R5, R6, R7, R8 |
| 4 | 2.2uF25v | Capacitor_SMD:C_1210_3225Metric | C3, C4, C14, C19 |
| 4 | 22k | Resistor_SMD:R_0805_2012Metric | R2, R9, R10, R17 |
| 4 | 470pF | Capacitor_SMD:C_0805_2012Metric | C10, C13, C17, C18 |
| 4 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2, JP4, JP5, JP6 |
| 2 | 10 | Resistor_SMD:R_0805_2012Metric | R12, R13 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric | R14, R15 |
| 2 | 1uF 25v | Capacitor_SMD:C_1210_3225Metric | C1, C2 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C8, C9 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric | R4, R19 |
| 2 | 47uF 16v | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C11, C12 |
| 2 | LM4558N | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | IC4, IC5 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP1, JP3 |
| 1 | 100uF 16V | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | 27C512 | Package_DIP:DIP-28_W15.24mm | IC6 |
| 1 | 68 | Resistor_SMD:R_0805_2012Metric | R11 |
| 1 | 74LS04D | Package_SO:SO-14_3.9x8.65mm_P1.27mm | IC3 |
| 1 | 74LS30D | Package_SO:SO-14_3.9x8.65mm_P1.27mm | IC2 |
| 1 | 78L05 | Package_TO_SOT_THT:TO-92 | VREG1 |
| 1 | Line Out | Connector_Audio:Jack_3.5mm_CUI_SJ1-3525N_Horizontal | J1 |
| 1 | YM2413 | Package_DIP:DIP-18_W7.62mm_LongPads | IC1 |
| 1 | my_components_MSX_SLOT_HOST | Library:DaewooBackSlotConnector | BUS_Expansion1 |
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Questions
How big is the DaewooBackslotFMPAC PCB?
It measures 85.4 × 64 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DaewooBackslotFMPAC use?
55 parts, built around the LM4558N and 78L05. 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 DaewooBackslotFMPAC KiCad files?
From the RBSC/Daewoo_CPC400_Upgrade repository on GitHub, at the commit this page was made from: the board is Boards/FMPAC/Board/DaewooBackslotFMPAC.kicad_pcb and its schematic Boards/FMPAC/Board/DaewooBackslotFMPAC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DaewooBackslotFMPAC design in my own project?
Its repository states no licence, so its author keeps all rights: ask RBSC before reusing the design.