27 Commits

Author	SHA1	Message	Date
Christopher RYU	18d1a7b7c7	Checkpoint.	2023-08-25 10:28:46 +09:00
Christopher RYU	802157185e	Major rework, watch for falling orcs.	2023-08-24 22:22:38 +09:00
Christopher RYU	870c2c5e87	Checkpoint.	2023-08-24 14:04:22 +09:00
Christopher RYU	b0007be8e8	First attempt at interposing a 74LS245, so that we can use a no-slot clock.	2023-08-24 11:55:52 +09:00
Christopher RYU	ea7c90dfce	Add pull-up resistors where appropriate.	2023-07-30 19:53:06 +09:00
Christopher RYU	819d7f47a0	Oops, flip transistor around.	2023-07-29 17:37:44 +09:00
Christopher RYU	c458ee9cb5	Use CMOS parts where appropriate (verified!)	2023-07-29 17:33:56 +09:00
Christopher RYU	ee1dc4359b	Add jumper for single-connector FloppyEmu support.	2023-07-19 11:59:51 +09:00
Christopher RYU	40e086a8a8	Align U7 with rest of row, add decoupling cap, add calibration information.	2023-07-18 16:13:17 +09:00
Christopher RYU	245af989b8	Align resistor and tighten tracks.	2023-07-18 15:22:26 +09:00
Christopher RYU	95c12f20e5	Move capacitor in case we want to reposition the transistor.	2023-07-18 09:46:53 +09:00
Christopher RYU	e53156d86b	Switch to TO-220 for better clearance.	2023-07-18 09:31:36 +09:00
Christopher RYU	268c33ffeb	Clean up schematic a bit.	2023-07-18 09:24:27 +09:00
Christopher RYU	c3c98ea406	Add all missing bypass capacitors.	2023-07-18 09:21:48 +09:00
Christopher RYU	8deda74495	Replace jumpers with DIP switch.	2023-07-18 08:44:13 +09:00
Christopher RYU	99844496bf	Reduce resistor footprint length.	2023-07-18 08:35:39 +09:00
Christopher RYU	1621afa43a	Switch from axial to radial capacitors.	2023-07-18 08:24:04 +09:00
Christopher RYU	5459bf5336	Add test points, reduce size of bypass caps and move to better location.	2023-07-18 08:11:47 +09:00
Christopher RYU	0caadf74e9	Add additional ripple-filtering capacitor per Franklin schematic.	2023-07-18 07:15:58 +09:00
Christopher RYU	44d1fb3650	Most capacitors are non-polarized.	2023-07-17 08:59:32 +09:00
Christopher RYU	2c0104d331	Clean up and modularize schematic.	2023-07-17 08:34:51 +09:00
Christopher RYU	22aa75f0b7	Add jumpers to select Micro-SCI / Franklin timing behavior.	2023-07-16 13:34:42 +09:00
Christopher RYU	151b864303	Clean up schematic.	2023-07-16 12:21:38 +09:00
Christopher RYU	c1569ee8c9	Remove obsolete comment.	2023-07-16 11:59:01 +09:00
Christopher RYU	1b3356bba9	Switch to 2716/2732.	2023-07-16 11:48:36 +09:00
Christopher RYU	4dc2dcec35	Board verified working (change C2/C3 values, note Franklin board difference)	2023-07-16 11:19:59 +09:00
Christopher RYU	59aa7096e0	Initial commit.	2023-07-10 05:40:39 +09:00