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micro-sci-a2-controller
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Revise DIP switch documentation.

This commit is contained in:
Christopher RYU 2023-07-30 05:38:22 +09:00
parent c473345ca5
commit 67ce44a530
1 changed files with 6 additions and 6 deletions
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README.md
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@ -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.