From nobody Tue Feb 10 20:09:08 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1634160235726783.1029669449016; Wed, 13 Oct 2021 14:23:55 -0700 (PDT) Received: from localhost ([::1]:40736 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1malj8-0005RD-0o for importer@patchew.org; Wed, 13 Oct 2021 17:23:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42550) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1malh8-0002my-4K for qemu-devel@nongnu.org; Wed, 13 Oct 2021 17:21:50 -0400 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:48402 helo=mail.default.ilande.bv.iomart.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1malh3-0006kC-Uh for qemu-devel@nongnu.org; Wed, 13 Oct 2021 17:21:49 -0400 Received: from [2a00:23c4:8b9d:d300:c17b:cf83:be43:9708] (helo=kentang.home) by mail.default.ilande.bv.iomart.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1malgm-0000Dh-Hk; Wed, 13 Oct 2021 22:21:32 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, laurent@vivier.eu Date: Wed, 13 Oct 2021 22:21:25 +0100 Message-Id: <20211013212132.31519-2-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20211013212132.31519-1-mark.cave-ayland@ilande.co.uk> References: <20211013212132.31519-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 2a00:23c4:8b9d:d300:c17b:cf83:be43:9708 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH 1/8] mac_via: update comment for VIA1B_vMystery bit X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.bv.iomart.io) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.default.ilande.bv.iomart.io X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1634160237931100001 Content-Type: text/plain; charset="utf-8" According to both Linux and NetBSD, port B bit 6 is used on the Quadra 800 = to configure the GLUE logic in A/UX mode. Whilst the name VIA1B_vMystery isn't particularly descriptive, the patch leaves this to ensure that the constants in mac_via.c remain in sync with Linux's mac_via.h. Signed-off-by: Mark Cave-Ayland Reviewed-by: Laurent Vivier --- hw/misc/mac_via.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index 993bac017d..7a53a8b4c0 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -130,6 +130,10 @@ * On SE/30, vertical sync interrupt enable. * 0=3Denabled. This vSync interrupt shows = up * as a slot $E interrupt. + * On Quadra 800 this bit toggles A/UX mode= which + * configures the glue logic to deliver som= e IRQs + * at different levels compared to a classic + * Mac. */ #define VIA1B_vADBS2 0x20 /* ADB state input bit 1 (unused on IIfx) */ #define VIA1B_vADBS1 0x10 /* ADB state input bit 0 (unused on IIfx) */ --=20 2.20.1