2 layers100.4 × 96 mm
Xt cf
monotech/XT-CF-RA
Rear-accessible XT-CF Bootable 8-bit ISA CompactFlash - no bracket machining required
34 parts6GPL-3.0
2 layers81.3 × 53.6 mm
DoubleROM
monotech/ISA-DoubleROM17ISA card to provide up to two writeable option-ROM sockets.
- Size
- 81.3 × 53.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 55
- Pads
- 214
- Tracks, vias
- 738, 25
- Pours
- 35
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Sep 2019
- Updated
- 21 Sep 2019
Overview
DoubleROM is an open-source printed circuit board by monotech, from the monotech/ISA-DoubleROM repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 81.3 × 53.6 mm with 19 parts on 55 nets, routed with 738 tracks and 25 vias.
It is built around the 74LS33PC. Its parts include 5 ICs, 4 capacitors, 4 switches and 1 connector.
Main components
1Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C2, C3, C4 |
| 3 | 10K | Resistor_THT:R_Array_SIP7 | RN1, RN2, RN3 |
| 2 | 74LS688 | Custom KiCad Library:DIP-20_W7.62mm | U3, U4 |
| 2 | Size | Monotech Obscure KiCad Library:SW_MS-22D18G2 | SW3, SW4 |
| 1 | 10uF | Capacitor_THT:CP_Radial_Tantal_D4.5mm_P5.00mm | C1 |
| 1 | 74LS33 | Custom KiCad Library:SOIC-14_3.9x8.7mm_P1.27mm | U5 |
| 1 | Bus_ISA_8bit | Custom:Conn_Bus_ISA8 | J1 |
| 1 | LOGO | Custom KiCad Library:Monotech Logo 18mm | G*** |
| 1 | ROM 1 | Custom KiCad Library:DIP-28_W15.24mm_Socket | U1 |
| 1 | ROM 1 Config | Button_Switch_THT:SW_DIP_SPSTx06_Slide_9.78x17.42mm_W7.62mm_P2.54mm | SW1 |
| 1 | ROM 2 | Custom KiCad Library:DIP-28_W15.24mm_Socket | U2 |
| 1 | ROM 2 Config | Button_Switch_THT:SW_DIP_SPSTx06_Slide_9.78x17.42mm_W7.62mm_P2.54mm | SW2 |
| 1 | Slot-8 Mode | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1 |
Questions
How big is the DoubleROM PCB?
It measures 81.3 × 53.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DoubleROM use?
19 parts, built around the 74LS33PC. 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 DoubleROM KiCad files?
From the monotech/ISA-DoubleROM repository on GitHub, at the commit this page was made from: the board is DoubleROM.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the DoubleROM design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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