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protocol-notes.txt
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protocol-notes.txt
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NA<->NPC serial capture, captured by Zbigniew Stachniak Nov 24, 2022
Curator
York University Computer Museum
Department of Electrical Engineering and Computer Science
York University
Toronto, Ontario, M3J 1P3
Canada
message nr device hex code
[1] NPC $83
NA $10 $06 $e4
[2] NPC $82
NA $10 $06
[3] NPC $01
NA $9f $10 $e1
[4] NPC $83
NA $10 $06 $e4
[5] NPC $82
NA $10 $06
[6] NPC $01
NA $9f $10 $e1
; typing channel code
[7] NPC $85
NA $10 $06
[8] NPC $00 $00 channel code
NA $e4
[9] NPC $81
NA $10 $06
[10] NPC $8f $05
NA $e4
; segment load request
[11] NPC $84
NA $10 06
[12] NPC $00 $01 $00 $00 pocket number byte (0)
followed by segment number (lsb first)
NA $e4 $91
[13] NPC $10 $06
NA sends a packet bytes + $10 $e1 at the end
[14] NPC $84
NA sendes the next segment + $10 $06
[15] NPC $01 $01 $00 $00 (the first byte beinng packet nr)
NA $e4 $91
[16] NPC $10 $06
NA packet bytes + $10 $e1 at the end
............. and so on ..................
; last packet
[175] NPC $10 $06
NA packet bytes + $10 $e1 at the end
[176] NPC $81
NA $10 $06
[177] NPC $0f $05
NA e4