From f3e6ae038abaf2240757bb2c8e85198efb9ba212 Mon Sep 17 00:00:00 2001 From: Eugene Lozovoy Date: Mon, 18 Sep 2023 12:30:39 +0300 Subject: [PATCH] update errata for pcb rev.A and rev.A1 --- README.md | 2 +- pcb/rev.A/ERRATA.txt | 3 +++ pcb/rev.A1/ERRATA.txt | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) create mode 100644 pcb/rev.A1/ERRATA.txt diff --git a/README.md b/README.md index 60ad664..2c537ab 100644 --- a/README.md +++ b/README.md @@ -12,7 +12,7 @@ Extension board for [Sizif-512](https://github.com/UzixLS/zx-sizif-512). ### Changelog & current status * Rev.A - first release. Please note the [errata](pcb/rev.A/ERRATA.txt). -* Rev.A1 - fixed all known issues of rev.A. +* Rev.A1 - fixed all known issues of rev.A. Please note the [errata](pcb/rev.A1/ERRATA.txt). ### Related projects * Turbo Sound FM ([link](http://www.nedopc.com/TURBOSOUND/ts-fm.php)) diff --git a/pcb/rev.A/ERRATA.txt b/pcb/rev.A/ERRATA.txt index 921243b..2ec7518 100644 --- a/pcb/rev.A/ERRATA.txt +++ b/pcb/rev.A/ERRATA.txt @@ -1,3 +1,6 @@ - MIDI_IN is connected to U4/pin13, should be U4/pin14 - Incorrect ZX BUS pinout. Following signal pairs should be swapped: NMI/MIX_R, MIX_L/RST, CLKCPU/A1 - Incorrect connection between U5/pin4, U10/pin4 and U7/pin28. Should be cutted. + +UPD. 2023-09-18: +- R1 and R34 should be 10kOhm diff --git a/pcb/rev.A1/ERRATA.txt b/pcb/rev.A1/ERRATA.txt new file mode 100644 index 0000000..589cb7f --- /dev/null +++ b/pcb/rev.A1/ERRATA.txt @@ -0,0 +1 @@ +- R1 and R34 should be 10kOhm