From 469f4138759b3be6b5608c3823da96e5620f9de2 Mon Sep 17 00:00:00 2001 From: Christopher RYU Date: Tue, 18 Jul 2023 14:44:17 +0900 Subject: [PATCH] Document more changes for v0.2 --- README.md | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index fc654e3..72e3810 100644 --- a/README.md +++ b/README.md @@ -4,7 +4,15 @@ This is a clone of the Micro-SCI / Franklin floppy drive controller. v0.1 is a direct clone, reverse-engineered from a Micro-SCI board. It was cross-checked with a Franklin-branded board, as well as the (belatedly discovered) official Franklin schematic (included in doc/service_and_schematics.pdf) -v0.2 replaces the 2708 EPROM with a more-common 2716/2732 EPROM. +v0.2 has the following enhancements over the original design: + +* the 2708 EPROM has been replaced with a more-common 2716/2732 EPROM +* decoupling capacitors have been added +* footprints for all capacitors and resistors have been modernized +* firmware EPROM bank selection jumpers replaced with a DIP switch +* obsolete MPS-U51 transistor replaced with modern equivalent +* clearly-maked calibration test points have been added +* ground pours used to increase operational stability Firmware images can be built via the Makefile in the firmware subdirectory. The build framework requires cc65.