{"id":357,"date":"2011-08-28T18:13:09","date_gmt":"2011-08-28T16:13:09","guid":{"rendered":"http:\/\/lallafa.de\/blog\/?p=357"},"modified":"2011-08-28T18:13:09","modified_gmt":"2011-08-28T16:13:09","slug":"plip2slip-0-1-released","status":"publish","type":"post","link":"https:\/\/lallafa.de\/blog\/2011\/08\/plip2slip-0-1-released\/","title":{"rendered":"plip2slip 0.1 released"},"content":{"rendered":"

\"\"<\/a>While playing with my A500 recently, I had the idea to try out the TCP Stacks available for this platform. Since the little Amiga lacks a decent ethernet card I had to get along with the internal serial port and a SLIP <\/a>connection. With 9600 Baud this is very slooow. So I kept on searching for a faster solution and found a PLIP<\/a> implementation on Aminet<\/a>. PLIP using the parallel port is much faster than SLIP, but you need a peer with a parallel port, too… and that’s the hard part today \ud83d\ude09<\/p>\n

Following\u00c2\u00a0 the same approach as found in my dtv2ser<\/a> project, I just attached an AVR ATmega microcontroller to the parallel lines of my Amiga and implemented the PLIP counterpart there. The ATmega on the popular Arduino 2009<\/a> boards has a fast serial connection that maps to a USB port via a FTDI 232. This is the ideal data channel for transporting the PLIP packets to your host Mac or PC. With baudrates up to 500 kBaud (~50 KiB\/s) and hardware handshaking with RTS\/CTS you can easily transfer the data packets very fast to your PC and encapsulate them again in SLIP.<\/p>\n

With this idea I started to implement the plip2slip firmware. Fortunately, the magPLIP<\/a> driver for the Amiga comes with source and so I could port the code to the AVR. With slight modifications on the Amiga part (patch included) I was able to receive the first packets from the Amiga on the Arduino. Then I implemented a simple Ping mode that receives ICMP Ping Requests transforms them to Replies and returns them to the Amiga: plip2slip soon was a ping machine \ud83d\ude09 I repeated the same thing for the SLIP side and with a patched slattach tool on Ubuntu Linux I was soon able to ping the AVR from this side, too.<\/p>\n

With the basic parts of plip2slip in place and working I finally added the transport\/bridging mode that transfers all received PLIP packets to SLIP and vice versa. With this mode running I could ping the Ubuntu host from my Amiga! After some IP forward configuration on Ubuntu I was able to reach my home network and also the Internet with the A500.<\/p>\n

And its real fast! An FTP download on my Amiga reaches 25 KiB\/s<\/strong> when transferring 10k from Linux! So compared to SLIP with 9600 Baud its a real break through and worth the little hardware effort needed to build the Arduino device…<\/p>\n

There is still lots of potential for tuning and optimizing, but I wanted to share this little project as soon as possible with you. So I crammed up everything you need into a little 0.1 release<\/strong> that is available on my shiny new plip2slip homepage<\/a>. I hope you enjoy it and bring lots of your classic machines back to the net with decent speed…<\/p>\n","protected":false},"excerpt":{"rendered":"

While playing with my A500 recently, I had the idea to try out the TCP Stacks available for this platform. Since the little Amiga lacks a decent ethernet card I had to get along with the internal serial port and … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":314,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[11,8,6],"tags":[],"class_list":["post-357","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amiga","category-hardware","category-mac-stuff"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/lallafa.de\/blog\/wp-content\/uploads\/2011\/08\/plip2slip01a.jpg?fit=480%2C303&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/piBMF-5L","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/posts\/357","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/comments?post=357"}],"version-history":[{"count":5,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/posts\/357\/revisions"}],"predecessor-version":[{"id":362,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/posts\/357\/revisions\/362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/media\/314"}],"wp:attachment":[{"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/media?parent=357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/categories?post=357"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lallafa.de\/blog\/wp-json\/wp\/v2\/tags?post=357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}