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--- boards:sbc:tiny68k:tiny68k_kit2 [2025/02/14 08:37] – Revision from 2025-02-14
+++ boards:sbc:tiny68k:tiny68k_kit2 [2026/06/15 12:54] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+/* Imported from Wayback Machine
+   Original URL : https://www.retrobrewcomputers.org/doku.php?id=boards:sbc:tiny68k:tiny68k_kit2
+   Snapshot date: 2020-08-12
+   Generator    : wayback-archiver
+*/
+====== Build procedure for Tiny68K Kit#2 ======
+Kit #2 contains a [[boards:sbc:tiny68k:tiny68k_partial_bd|partially assembled pc board]] where SMT resistors and capacitors are assembled and Altera EPM7128 is assembled and programmed. Included with Kit #2 are also bags of resistors, capacitors, hardware, and active components as shown in the photo below.
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=24fdbf&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/kit2parts.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/kit2parts.jpg?600x400|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_kit2parts.jpg}}]]
+A high-resolution photo of the partial assembled board is below for reference
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=f10d2c&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/partial_assembly_comp.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/partial_assembly_comp.jpg?600x592|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_partial_assembly_comp.jpg}}]]
+Do not populate R11 and R15
+Install 5 bypass capacitors, C4-C8
+Install 3.6864MHz crystal, Y1
+The kit includes 2pcs 40-pin breakaway female socket strips. Break each 40-pin strip into a 32-pin strip and two 4-pin strips.
+Use four 4-pin strips as sockets for U5 and U7.
+Install a 4-pin socket for the 8MHz oscillator, U4
+Solder two terminals of T1 with a jumper wire. This is the write protect line for serial EEPROM, U5. Without the jumper U5 is writable.
+Install SIP 4.7K ohm resistor packs, R1 & R2. Observe the polarity of the resistor pack: pin 1 of the resistor pack is a square pad on the pc board that should match with pin 1 of the resistor pack (marked with a dot).
+Install the 7-segment LED display, D1. The decimal point is nearest to the pcb corner
+Install push button for reset, S1. The pc board footprint is slightly too wide, so the legs of the push button need to spread a tiny bit to accommodate the wide footprint.
+MCP130 voltage supervisor, U6. Line up the flat side of the package with the flat side of the silk screen.
+×5 header for Altera programming header, P2
+.5mm power jack, J1. The jack fits loosely on the pc board, so position the part in the desired orientation before soldering.
+(Optional step) Connect USB blaster to programming header, P2 (the stripe of programming ribbon line up with pin 2 of P2), apply 5V via the 2.5mm power jack (center is +5V, barrel is ground), verify the CPLD is programmed correctly.
+Install 2-terminal headers at T18/19, T20/21. This selects which serial EEPROM is the boot flash.
+Install two 32-pin socket strips as socket for 68000, U1.
+Install 40-pin socket for 68681, U3.
+Install SIMM72 socket, P1. Observe the polarity of the SIMM socket: The pin 1 index key of the socket must line up with pin 1 of silkscreen. Refer to the photo below for index key of the socket.
+-pin header for the console serial port. Two type of headers are included in the kit. One is 6-pin male-to-male wire-wrap strip, the other is 6-pin male-to-female wire-wrap strip. Select the header best fit your setup.
+Install a 24C256 in U5 and install a shorting block between T18/19. This is the default boot flash. The second boot flash in U7 is optional.
+Install 44-pin IDE-CF module, keep the module at the same level (another word, in the same plane) as the board before soldering. The assembly of Tiny68K is completed!
+completed Tiny68K board with empty sockets
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=c4f518&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_socketed_copy.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_socketed_copy.jpg?600x439|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_tiny68k_socketed_copy.jpg}}]]
+Photo shows the proper orientation of the SIMM socket
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=ce2a99&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_simm_socket_copy.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_simm_socket_copy.jpg?600x361|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_tiny68k_simm_socket_copy.jpg}}]]
+Completed board with components, component side
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=af384b&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_assembled_front.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68k_assembled_front.jpg?600x456|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_tiny68k_assembled_front.jpg}}]]
+Completed board with components, solder side
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=5e647e&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68kassembled_back.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/tiny68k/tiny68kassembled_back.jpg?600x450|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_tiny68k_tiny68kassembled_back.jpg}}]]