Una soluzione al problema del “Unauthorized network card” sui thinkpad recenti.
\nGrazie a Tisheng Chen (tishengchen@yahoo.com).<\/p>\n
In recent IBM thinkpad systems, there is a limit to allowed MiniPCI wireless cards.
\nWhen an unauthorized card is plugged in, the system doesn’t boot and halt with an error message like:<\/p>\n
I met this 1802 error problem several months ago, and since then my wifi card was used in a very clumsy and inconvenient way. I used to boot to LILO menu or Windows system first, then suspend and plug in the card. After that, when the system is awake, the card is working.<\/p>\n Recently, I learned two solutions to attack this problem. One is to crack the BIOS by modifying the PCI_ID list of allowed cards in the BIOS, as suggested by Paul Sladen and Matthew Garrett. The other way is unbelievably simple. There is a byte in CMOS which controls whether an “unauthorized” card is allowed or not. That’s 0x6a, actually only the bit 0x80. The program to unlock the authorization mechanism is like (asm):<\/p>\n The program can be downloaded from: http:\/\/jcnp.pku.edu.cn\/~shadow\/1802\/no-1802.com<\/a> The CMOS solution is safe, but I’m not sure that it works for all recent thinkpads and all cards. The BIOS crack sure does, however it is difficult and dangerous.<\/p>\n","protected":false},"excerpt":{"rendered":" Una soluzione al problema del “Unauthorized network card” sui thinkpad recenti. Grazie a Tisheng Chen (tishengchen@yahoo.com). In recent IBM thinkpad systems, there is a limit to allowed MiniPCI wireless cards. When an unauthorized card is plugged in, the system doesn’t boot and halt with an error message like: ERROR 1802: Unauthorized network card is plugged … Continue reading “Minipci su ThinkPad T30 (Unauthorized network card)”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,3,5],"tags":[],"class_list":["post-7","post","type-post","status-publish","format-standard","hentry","category-english","category-geek","category-italiano"],"_links":{"self":[{"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/posts\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=7"}],"version-history":[{"count":0,"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/posts\/7\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kill-9.it\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}ERROR
\n1802: Unauthorized network card is plugged in
\nPower off and remove the miniPCI network card.
\n<\/code><\/p>\n
\n(Reference: http:\/\/www.paul.sladen.org\/thinkpad-r31\/wifi-card-pci-ids.html<\/a>)<\/p>\nMOV DX,0070
\nMOV AL,6A
\nOUT DX,AL
\nMOV DX,0071
\nIN AL,DX
\nOR AL,80
\nOUT DX,AL
\nMOV AX,4C00
\nINT 21
\n<\/code><\/p>\n
\nTo use this program, you need to boot to DOS.<\/p>\n