3090: Difference between revisions
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The microcode for the CPU is held in two EPROMs, 27256.[[File:3090 microcode Image.png| right|3090 - EPROMs with microcode]] | The microcode for the CPU is held in two EPROMs, 27256.[[File:3090 microcode Image.png| right|3090 - EPROMs with microcode]] | ||
Location: the board has letters for rows (A, B, C, ...) on the left edge, and numbers (1, 2, 3, ...) at the top edge. Location of any given component on the board is given as a single letter and number (for small components) or as a series of letters and numbers (for larger components, covering more than one row and / or column). | |||
Dumps of the chips, made with a EPROM programmer | Dumps of the chips, made with a EPROM programmer | ||
* Left chip: [[File:Microcode 37932A G89.bin.bz2]] | * Left chip: [[File:Microcode 37932A G89.bin.bz2]] Location on board: G-8-9 | ||
* right chip: [[File:Microcode 37933A G67.bin.bz2]] | * right chip: [[File:Microcode 37933A G67.bin.bz2]] Location on board: G-6-7 | ||
This is version 2 of the microcode. | This is version 2 of the microcode. | ||
(From an early CPU card, right after prototyping. Used for training the test team in production in the basement at Skullerud) | |||
==References== | ==References== | ||
Latest revision as of 10:11, 19 March 2023
3090 is the first ND-110 CPU board (referred to as the "old" CPU card). It contains the CPU, bus arbitration logic, memory control, cache memory and other subsystems, including the Real time clock and the I/O for the serial console.
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Introduction
This is the "old" ND-110 CPU card.
Switches and indicators
The following switches and indicators are on the card
Location 29J - potentiometer Location 28J - ALD edge switch Location 26J - baud rate edge switch Location 21J - self test lamp (green) Location 19J - running lamp (red) Location 15J - cache on lamp (red) Location 13J - cache on/off switch
Connectors
The A and B connectors are used for I/O, the C connector is used for the ND-100 Bus.
I/O Devices on the card
See also
3095 new ND-110 CPU board
Microcode
The microcode for the CPU is held in two EPROMs, 27256.
Location: the board has letters for rows (A, B, C, ...) on the left edge, and numbers (1, 2, 3, ...) at the top edge. Location of any given component on the board is given as a single letter and number (for small components) or as a series of letters and numbers (for larger components, covering more than one row and / or column).
Dumps of the chips, made with a EPROM programmer
- Left chip: File:Microcode 37932A G89.bin.bz2 Location on board: G-8-9
- right chip: File:Microcode 37933A G67.bin.bz2 Location on board: G-6-7
This is version 2 of the microcode. (From an early CPU card, right after prototyping. Used for training the test team in production in the basement at Skullerud)
References
- Norsk Data Document ND–06.026.01 ND-110 Functional Description
- Norsk Data Document ND–30.008.3 EN ND-100 Hardware Maintenance , page 232