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Sun, 18 Apr 2021 03:04:31 +0000 Received: by kubenode506.mail-prod1.omega.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 6e488f6310892f4b816c43efcdc44358; Sun, 18 Apr 2021 03:04:27 +0000 (UTC) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.60.0.2.21\)) Subject: Re: RPi4B 2711ZPKFSB06C0T parts seen in the wild, 13.0-RELEASE fails to boot on them From: Mark Millard In-Reply-To: Date: Sat, 17 Apr 2021 20:04:26 -0700 Cc: freebsd-arm@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <39AB95E8-AC86-465C-94E6-C2B8040EB45D@yahoo.com> References: <05740E83-5A45-4944-AC87-629D21D7F579.ref@yahoo.com> <05740E83-5A45-4944-AC87-629D21D7F579@yahoo.com> To: tech-lists X-Mailer: Apple Mail (2.3654.60.0.2.21) X-Rspamd-Queue-Id: 4FNFD06fc3z3tTs X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.50 / 15.00]; RBL_SENDERSCORE_FAIL(0.00)[98.137.68.204:server fail]; TO_DN_SOME(0.00)[]; FREEMAIL_FROM(0.00)[yahoo.com]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; DKIM_TRACE(0.00)[yahoo.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US]; RBL_DBL_DONT_QUERY_IPS(0.00)[98.137.68.204:from]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; SPAMHAUS_ZRD(0.00)[98.137.68.204:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[98.137.68.204:from]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.68.204:from]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-arm] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Porting FreeBSD to ARM processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Apr 2021 03:04:33 -0000 On 2021-Apr-17, at 19:43, tech-lists wrote: > On Sat, Apr 17, 2021 at 11:08:31AM -0700, Mark Millard via freebsd-arm = wrote: >> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255080 >>=20 >> comment #5 reports a comparison/contrast of 4 GiByte >> RPi4B's with: >>=20 >> BROADCOM >> 2711ZPKFSB06BOT >> TE1919 >> 045-23 B3 W >=20 > Is there a way, on both linux and freebsd, of reading this information > other than looking at the writing on the chip directly? I've never noticed a reference to a way to do that directly. In some cases you can infer from the RPi revision code's "TTTTTTTT Type" field that it should have C0T (or later?) parts: The 14: CM4 and 13: 400. But, for this new example, the type field is far from sufficient and we can not be sure that even the whole revision code would be sufficient. Some B0T parts might have a b03114 revision code for all I know. =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)