2 layers81.3 × 53.6 mm
DoubleROM
monotech/ISA-DoubleROM
ISA card to provide up to two writeable option-ROM sockets.
19 parts17GPL-3.0
2 layers100.4 × 96 mm
Xt cf
monotech/XT-CF-RA6Rear-accessible XT-CF Bootable 8-bit ISA CompactFlash - no bracket machining required
- Size
- 100.4 × 96 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 63
- Pads
- 268
- Tracks, vias
- 761, 50
- Pours
- 64
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 6 Jun 2019
- Updated
- 6 Jun 2019
Overview
Xt cf is an open-source printed circuit board by monotech, from the monotech/XT-CF-RA repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 100.4 × 96 mm with 34 parts on 63 nets, routed with 761 tracks and 50 vias.
It is built around the 74LS04PC, 74LS32SC and 74LS33PC. Its parts include 8 capacitors, 6 ICs, 5 switches, 3 resistors and 2 connectors. It belongs with the retro computing and games boards of this library.
Main components
3README
README.mdMonotech XT-CF Rev1.0 ReadMe
8-bit ISA CompactFlash interface + Boot ROM (two separate functions that can be used individually).
Documentation for the switches can be found on the rear silkscreen.
Credit:
Design uses schematic from Sergey Kiselev, with a few small changes to switches, 32K ROM support, and PCB from scratch to suit my brackets.
www.malinov.com/Home/sergeys-projects/xt-cf-lite
XT-IDE Universal BIOS
www.xtideuniversalbios.org
www.xtideuniversalbios.org/binaries
Use the latest working binary that includes XTIDECFG.COM (config utility), ide_xt.bin (8086/8088), ide_xtp.bin (80186/V20/V30 and up).
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C4, C5 |
| 4 | 3.2mm | MountingHole:MountingHole_3.2mm_M3_Pad | HOLE1, HOLE2, HOLE3, HOLE4 |
| 2 | 10K | Resistor_THT:R_Array_SIP8 | RN1, RN2 |
| 2 | 10uF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C7, C8 |
| 2 | 74LS688 | Custom KiCad Library:DIP-20_W7.62mm | U3, U4 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C9 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1 |
| 1 | 28C256 | Custom KiCad Library:DIP-28_W15.24mm_Socket | U5 |
| 1 | 5.6K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3 |
| 1 | 74LS04 | Custom KiCad Library:DIP-14_W7.62mm | U1 |
| 1 | 74LS32 | Custom KiCad Library:DIP-14_W7.62mm | U2 |
| 1 | 74LS33 | Custom KiCad Library:SOIC-14_3.9x8.7mm_P1.27mm | U6 |
| 1 | Activity LED | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | D1 |
| 1 | BUSPC_DEV | Custom:ISA-8BIT-XT-CF | BUS1 |
| 1 | CF Address | Button_Switch_THT:SW_DIP_SPSTx03_Slide_9.78x9.8mm_W7.62mm_P2.54mm | SW1 |
| 1 | IDE | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | Logo_Open_Hardware_Large | Custom:Monotech Logo 12.7mm | LOGO1 |
| 1 | Power | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J2 |
| 1 | ROM Address | Button_Switch_THT:SW_DIP_SPSTx04_Slide_9.78x12.34mm_W7.62mm_P2.54mm | SW2 |
| 1 | ROM Enable | Button_Switch_THT:SW_CuK_OS102011MA1QN1_SPDT_Angled | SW4 |
| 1 | ROM Size | Custom:SW_MS-22D18G2 | SW3 |
| 1 | ROM Write Protect | Button_Switch_THT:SW_CuK_OS102011MA1QN1_SPDT_Angled | SW5 |
| 1 | Slot-8 Mode | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
Questions
How big is the Xt cf PCB?
It measures 100.4 × 96 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Xt cf use?
34 parts, built around the 74LS04PC, 74LS32SC and 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 Xt cf KiCad files?
From the monotech/XT-CF-RA repository on GitHub, at the commit this page was made from: the board is xt-cf.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Xt cf 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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