Michael G

Reverse-engineering the ModR/M addressing microcode in the Intel 8086 processor

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One interesting aspect of a computer’s instruction set is its addressing modes, how the computer determines the address for a memory access. The Intel 8086 (1978) used the ModR/M byte, a special byte following the opcode, to select the addressing mode. The ModR/M byte has persisted into the modern x86 architecture, so it’s interesting to look at its roots and original implementation. In this post, I look at the hardware and microcode in the 8086 that implements ModR/M and how the 8086 designers fit multiple addressing modes into the 8086’s limited microcode ROM. One technique was a hybrid approach that combined generic microcode with hardware logic that filled in the details for a particular instruction. A second technique was modular microcode, with subroutines for various parts of the task. This is way above my pay grade, but I know quite a few of you love this kind of writing. Very in-depth.

Anwar mungkin dikenang sebagai ‘bapa saman negara’, kata Ahli Parlimen PAS

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Video by via Dailymotion Source Ahli Parlimen Pendang, Awang Hashim berkata tidak mustahil Perdana Menteri, Anwar Ibrahim digelar ‘bapa saman negara’ jika tidak boleh menerima kritikan daripada pembangkang Laporan Lanjut: https://www.freemalaysiatoday.com/category/bahasa/tempatan/2023/02/27/anwar-mungkin-dikenang-sebagai-bapa-saman-negara-kata-ahli-parlimen-pas/ Free Malaysia Today is an independent, bi-lingual news portal with a focus on Malaysian current affairs. Subscribe to our channel – http://bit.ly/2Qo08ry ——————————————————————————————————————————————————Check us … Read more

How to make pink rose with crepe paper(part-I) | How to make rose with crepe paper | Unique…

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Video by via Dailymotion Source Hello friends! Today I am sharing with you how to make beautiful crepe paper rose & bud 2)how to make rose with crepe paper 3)how to make rose bud with crepe paper easy4)how to make rose with crepe paper step by step5)crepe paper roses6)crepe paper roses tutorial7)crepe paper flowers8)rose flower9)rose … Read more

Know The Significance Of Omm Namah Shivaya

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Video by via Dailymotion Source Know The Significance Of Omm Namah Shivaya. Argus News is Odisha’s fastest-growing news channel having its presence on satellite TV and various web platforms. Watch the latest news updates LIVE on matters related to education & employment, health & wellness, politics, sports, business, entertainment, and more. Argus News is setting … Read more