2 layers234 × 100 mm
V2b
KITTY-6502/hardware
the KITTY is a 65c02 homebrew kit microcomputer designed around text mode graphics and cartridge media. It is fully open source, and uses exclusively in-production parts.
147 parts
2 layers234 × 87.3 mm
the KITTY is a 65c02 homebrew kit microcomputer designed around text mode graphics and cartridge media. It is fully open source, and uses exclusively in-production parts.
- Size
- 234 × 87.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 123
- Nets
- 216
- Pads
- 862
- Tracks, vias
- 4,368, 350
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Jan 2024
- Updated
- 18 Jan 2025
Overview
V0c is an open-source printed circuit board by KITTY-6502, from the KITTY-6502/hardware repository on GitHub. It is a 2-layer board of 234 × 87.3 mm with 123 parts on 216 nets, routed with 4,368 tracks and 350 vias.
It is built around the 74HC541D, 74HC574D and 74HC138, with the 74HC590ADW, 74HC670P-E and 74HC00D among its other parts. Its parts include 47 resistors, 32 capacitors, 25 ICs, 8 connectors and 2 diodes.
Main components
12
74HC541D
SO-20-300mil-40℃~+125℃ 1 12ns@4.5V,50pF 160uA 2V~6V 7.8mA 7.8mA 74HC 8 Output enable Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers74HC574D
SOP-20L-40℃~+125℃ 1 13ns 15ns@6V,50pF 2.7V~6V 20uA 28MHz 5ns 6.5pF 7.8mA 7.8mA 74HC Series 8 D-Type Enable Rising Edge Tri-State SOP-20L Flip Flops ROHSMDDFlip Flops
74HC138
SOP-160℃~+70℃ 24ns@5.0V,16pF 2V~6V 3/8 5.2mA 5.2mA 5uA 74HC Decoder Reverse function Single Supply SOP-16 Signal Switches, Multiplexers, Decoders ROHSGRSignal Switches, Multiplexers, Decoders
74HC590ADW
SOIC-16-300milSOIC-16-300mil Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
74HC670P-E
DIP-16-40℃~+125℃ 16 21ns@4.5V,50pF 2V~6V 35mA 35mA 74HC Output enable Tri-State DIP-16 Shift Registers ROHSRenesas ElectronicsShift Registers
74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC14
SOP-14-40℃~+85℃ 1.9V、3.98V、4.4V、5.48V、5.9V 100mV、260mV、260mV 20uA 25ns@4.5V,50pF 2V~6V 6 74HC Noise suppression function Schmitt trigger SOP-14 Inverters ROHSJSMSEMIInverters
74HC157D
SO-16-40℃~+125℃ 10ns@6.0V,50pF 160uA 2V~6V 5.2mA 5.2mA 74HC 8/4 Multiplexer Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches / Encoders & Decoders / Multiplexers74HC166D
SOP-16LSOP-16L Shift Registers ROHSMDDShift Registers74HC273D
SOIC-20-300mil-40℃~+125℃ 1 12ns 15ns@4.5V,50pF 2V~6V 3.5pF 30MHz 3ns 74HC Series 8 8uA D-Type Reset Rising Edge SO-20-300mil Flip Flops ROHSNexperiaFlip Flops74HC4040D
SOIC-16-40℃~+125℃ 1 14ns 2V~6V 98MHz Asynchronous Divide-by-2 Falling Edge Up Counter SOIC-16 Counters, Dividers ROHSNexperiaCounters, Dividers74HC4520D
SO-16-40℃~+125℃ 2 28ns 2V~6V 4 58MHz Asynchronous Binary Counter Falling Edge、Rising Edge Synchronous SO-16 Counters, Dividers ROHSNexperiaCounters, Dividers
README
README.mdKITTY Computer
the KITTY is a 65c02 homebrew kit microcomputer designed around text mode graphics and cartridge media. It is fully open source, and uses exclusively in-production parts.
Quick Specs:
- Bus Speed: 3Mhz
- CPU:* w65c02s @~2.2Mhz (average)
- RAM: 28Kb SRAM
- Video: Custom, 256x256pixels, a text mode display using a preset font, 32x32 8x8 pixel characters, 16 color palette
- Sound: Custom, 8x1 Wavetable Audio, 3 melodic + 1 percussive channels, all with 4bit+4bit stereo volume control.
- Input: 40-Key Mechanical Keyboard
- Media/Expansion: 2 Cartridge Slots, each with up to 128x32Kb banks.
- Interrupts: /IRQ triggered when the video circuit has drawn the last visible pixels on the frame.
- Output: RGB PAL (50hz), via a SCART connector.
Parts
123| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 100nF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 +12 |
| 12 | R_Small | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R32, R33, R34, R35, R36, R37, R38, R39, R40, R41, R42, R43 |
| 10 | R2 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R4, R5, R7, R8, R10, R11, R14, R15, R18, R19 |
| 7 | 3.3kΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R20, R21, R22, R23, R24, R25, R29 |
| 6 | R1 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R6, R9, R12, R13, R16, R17 |
| 4 | 74HC574 | PCM_Package_DIP_AKL:DIP-20_W7.62mm_Socket_LongPads | U5, U10, U13, U16 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO14580 | H1, H2, H3, H4 |
| 2 | 1kΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R30, R31 |
| 2 | 33pF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C2, C3 |
| 2 | 74HC138 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U9, U24 |
| 2 | 74HC590A | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U11, U12 |
| 2 | 74HC670 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U18, U19 |
| 2 | 75Ω | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R26, R28 |
| 2 | Conn_01x22 | Connector_PinHeader_2.54mm:PinHeader_1x22_P2.54mm_Vertical | J5, J9 |
| 2 | Conn_02x22_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x22_P2.54mm_Vertical | J4, J8 |
| 2 | R_Small | PCM_Resistor_THT_US_AKL:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R46, R47 |
| 2 | SST39F | PCM_Package_LCC_AKL:PLCC-32_THT-Socket | U4, U23 |
| 1 | 1.2kΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R27 |
| 1 | 10kΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 12 Mhz | Crystal:Crystal_HC52-8mm_Vertical | Y1 |
| 1 | 1MΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2 |
| 1 | 1µF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C1 |
| 1 | 3.3kΩ | Resistor_THT:R_Array_SIP9 | RN2 |
| 1 | 390Ω | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3 |
| 1 | 47kΩ | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R45 |
| 1 | 62256 | PCM_Package_DIP_AKL:DIP-28_W15.24mm_Socket_LongPads | U21 |
| 1 | 65c02 | PCM_Package_LCC_AKL:PLCC-44_THT-Socket | U6 |
| 1 | 680Ω | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R44 |
| 1 | 74HC00 | PCM_Package_DIP_AKL:DIP-14_W7.62mm_Socket_LongPads | U7 |
| 1 | 74HC14 | PCM_Package_DIP_AKL:DIP-14_W7.62mm_Socket_LongPads | U2 |
| 1 | 74HC157 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U15 |
| 1 | 74HC166 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U14 |
| 1 | 74HC273 | PCM_Package_DIP_AKL:DIP-20_W7.62mm_Socket_LongPads | U26 |
| 1 | 74HC4040 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U3 |
| 1 | 74HC4520 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U1 |
| 1 | 74HC541 | PCM_Package_DIP_AKL:DIP-20_W7.62mm_Socket_LongPads | U25 |
| 1 | 74HC85 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U8 |
| 1 | 74HCT153 | PCM_Package_DIP_AKL:DIP-16_W7.62mm_Socket_LongPads | U20 |
| 1 | 82c54 | PCM_Package_DIP_AKL:DIP-24_W15.24mm_Socket_LongPads | U17 |
| 1 | Barrel_Jack_MountingPin | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | C_Polarized | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C30 |
| 1 | Conn_01x05_Socket | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J6 |
| 1 | Conn_01x09_Socket | Connector_PinSocket_2.54mm:PinSocket_1x09_P2.54mm_Vertical | J7 |
| 1 | D_Small | Diode_THT:D_A-405_P2.54mm_Vertical_KathodeUp | D1 |
| 1 | NPN | PCM_Package_TO_SOT_THT_AKL:TO-92L_HandSolder | Q1 |
| 1 | Power | LED_THT:LED_D5.0mm | D2 |
| 1 | RESET | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | SCART-F | Video:SCART | J2 |
| 1 | SW_DPDT_x2 | Button_Switch_THT:SW_CuK_JS202011AQN_DPDT_Angled | SW1 |
Questions
How big is the V0c PCB?
It measures 234 × 87.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the V0c use?
123 parts, built around the 74HC541D, 74HC574D, 74HC138 and 74HC590ADW. 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 V0c KiCad files?
From the KITTY-6502/hardware repository on GitHub, at the commit this page was made from: the board is Kicad/mainboard/v0c/v0c.kicad_pcb and its schematic Kicad/case/back/back.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the V0c design in my own project?
Its repository states no licence, so its author keeps all rights: ask KITTY-6502 before reusing the design.
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