From 67ce44a53014a3a8835d4d6a9657de65f946cc39 Mon Sep 17 00:00:00 2001 From: Christopher RYU Date: Sun, 30 Jul 2023 05:38:22 +0900 Subject: [PATCH] Revise DIP switch documentation. --- README.md | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/README.md b/README.md index 4fccda3..d41eb4b 100644 --- a/README.md +++ b/README.md @@ -21,14 +21,14 @@ Firmware images can be built via the Makefile in the firmware subdirectory. The ## EPROM bank select switches (J4) -* 1:off 2:off - controller test firmware (0x0000) -* 1:off 2: on - 16-sector firmware (0x0100) -* 1: on 2:off - 13-sector firmware (0x0200) -* 1: on 2: on - firmware "put jumpers here" splash screen (0x0300) +* 1:off 2:off - firmware "put jumpers here" splash screen (0x0300) +* 1:off 2: on - 13-sector firmware (0x0200) +* 1: on 2:off - 16-sector firmware (0x0100) +* 1: on 2: on - controller test firmware (0x0000) ## Calibration procedure -* set J4 to off/off ("controller test firmware") +* set J4 to on/on ("controller test firmware") * connect oscilloscope to TP1 * start machine * execute "call 50688" @@ -43,4 +43,4 @@ Firmware images can be built via the Makefile in the firmware subdirectory. The * J3 can be omitted if this controller is used with a FloppyEmu * All discrete logic ICs (except U15, the 74LS373) can be CMOS (74ACT, 74HCT). As is unfortunately usual with the Apple ][, U15 must be LS due to timing issues. -* if CMOS logic is used, then Q1/R6/R6 can be omitted -- the entire logic array can remain powered up at all times. Connect pads 1 and 3 on the Q1 footprint. +* if CMOS logic is used, then Q1/R6/R7 can be omitted -- the entire logic array can remain powered up at all times. Connect pads 1 and 3 on the Q1 footprint.