An Amiga 1000-500-2000-3000 DF0: - External Floppy Drive Swapper
This module can swap an internal DF0: drive with an external DF1: floppy drive in order to boot from an external device, such as a Gotek Floppy Emulator.
First module fits under the MOS 8520 Even CIA.
Second module is inline with the internal DF0: drive.
A small CPU detects two fast consecutive resets (CTRL-A-A twice). This will activate or deactivate the floppy swapping.
A piezo will emit sounds when the swapping is activated or deactivated.
This device will fully support external booting from any 880K disks, while still permitting the use of internal DF0: as DF1: (hardware fix)
- Don't forget to add 2 wires between the two boards! This will feed signal MTRON and READY to and from the main circuit thus enabling the magic with internal drive!
You can have it build at PCBWay under my shared projects.
| Quantity | Designator | Manufacturer Part Number |
|---|---|---|
| 3 | C1,C2,C3 | 0.1uF 0805 AC0805KFX7R9BB104 |
| 2 | J1 | HEADER3x1 61300311121 |
| 2 | J2 | CHIP 17-2444090-5-ND |
| 2 | J3 | SOCKET BHS-120-G-A |
| 1 | J4 | HEADER34M 67997-234HLF |
| 1 | J5 | HEADER34F ESQ-120-34-L-D |
| 2 | J6,J7 | HD2 0022053021 |
| 1 | LS1 | PIEZO CMT-1603-SMT-TR |
| 1 | R1 | 1K 0805 CR0805-JW-102ELF |
| 2 | R6,R7 | 2.2K 0805 RK73H2ATTD4022F |
| 1 | U1 | ATTINY13 ATTINY13-20SSU |
| 1 | U2 | 74LS153 SN74LS153DR |
| 1 | U3 | 74LS38 SN74LS38DR |