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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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 Posted: Sat Jul 31, 2021 1:33 pm Post subject: |
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The HMOS II-E version is available for these Intel 27128A-1 (150ns), 27128A-2 (200ns), and 27128A-3 (300ns). The older 27128-4 has been discontinued which it is intended to replace with 27128A-3 version.
Source: Intel Corporation, "New Product Focus Components: New Addition To HMOS II EPROM Family", Solutions, July/August 1984, Page 13. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Mon Aug 02, 2021 3:48 pm Post subject: |
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The Intel's 8256AH Multifunction Peripheral uses the new HMOS II technology over NMOS 8256A series. It combines from 8251A, 8253, 8255A and 8259A into 40 pins package.
Source: Intel Corporation, "New Product Focus Components: Peripheral Vision: The 8256AH Combines Four Chips In One", Solutions, July/August 1984, Page 13. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Sun Aug 08, 2021 11:23 am Post subject: |
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I found an older article about Intel's ICE-86 machine in related to CPUShack's article from https://www.cpu-world.com/forum/viewtopic.php?t=36359
Source: Intel Corporation, "Microcomputer Systems: The new Intel ICE-86 In-Circut Emulator is here, for interactive development of hardware and software using the 8086 microprocessor. The ICE-86 emulator is the newest member of the growing Intel family of in-circuit emulators.", Intel Preview, March/April 1979, page 7. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Thu Aug 12, 2021 8:47 am Post subject: |
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Here is an article about Intel's newest CHMOS process technology.
Source: Intel Corporation, "CHMOS: Striking The Technological Balance For The Future", Solutions, September/October 1984, Page 2. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Thu Aug 26, 2021 12:58 pm Post subject: |
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The 51C256 Dynamic RAM series uses the new CHMOS technology were available in plastic packaging.
Source: Intel Corporation, "Focus Component: Scaling New Heights With The First 256K CHMOS Dynamic RAM", Solutions, September/October 1984, Page 10. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Sat Sep 04, 2021 8:58 am Post subject: |
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Here are these Intel 27512 and 27513 EPROMs using the HMOS II-E technology process.
Source: Intel Corporation, "Focus Component: Dual EPROMs: 512K Densities That Deliver", Solutions, September/October 1984, Page 11. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Wed Sep 08, 2021 9:33 am Post subject: |
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Here is the military version of M2817A E²PROM available for the market.
Source: Intel Corporation, "Focus Component: The M2817A Reports For Duty", Solutions, September/October 1984, Page 11. |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Wed Sep 08, 2021 12:08 pm Post subject: |
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A reader posted a comment about the 27128A EPROMs ironically just recently
| Quote: | I worked for Intel for a summer in the early 1980s and my job was writing production sort test code (code that tests the function of every die on-wafer and implemented any sparing/repair at the same time). If you have a Intel 27128A EPROM, it was tested and possibly "repaired" with my code. That code was entirely 8085A assembly.
For all such products, there were special test modes that are akin today to JTAG test modes but every vendor and every chip implemented it differently back then. Essentially new "personalities and features" were enabled by these test modes. This is how things like sparing were implemented.
Generally you'd raise voltages on pins normally operating at 5V or 12V to particular higher voltage values and that would cause the mode to appear. The functions of the the rest of the pins would change and you could specify taking out half the array (like the 2708 example) or burning in spare rows or columns to replace bad ones in the main array. I don't remember the specifics for the 27128A - it was too long ago.
The 27128A had 3 spare columns. The 27256A has both spare rows and spare columns (don't remember how many).
The burning of spares or array block-outs was done with either nichrome fuses, poly fuses or "u-prom" fuses - all of which are nominally irreversible when blown. Which type used depends on the particular generation. The 27128A and later used u-prom fuses.
U-prom fuses are EPROM cells that have an extra metal layer above the device so that UV erase can never erase them when you are erasing the main array. Using them simplifies the process (eliminating an odd-ball and quality/reliability harming nichrome deposition and etch sequence). Polysilicon was fully compatible with an NMOS/CMOS process but had quality/reliability problems. U-prom cells were exactly identical to the product array cells with only a metal mask difference so have the best of all worlds.
This kind of sparing and blocking has always been super common and is still used today in pretty much ALL digital parts to this day. The most common example is N-core processors - there is absolutely no difference in the die between these for a particular family-generation: it's ONLY about how many of the maximum core count were blocked out (e.g. an 8-core family's 2-core version is the 8-core with 6 cores blocked either due to failures or due to inventory management). |
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i440bx
Joined: 30 May 2004
Posts: 1349
Location: Germany
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Thu Sep 09, 2021 6:26 am Post subject: |
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| Looks like they put some kind of extra circuit in case one or more circuit did not pass the test! |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Thu Sep 09, 2021 7:21 am Post subject: |
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These are unsung hero chipsets to support the microprocessor.
Source: Gomes, Lee, Intel Corporation, "Unsung and Out of Sight: Support Chips Haul the Heavy Load", Solutions, September/October 1984, Page 18. |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Thu Sep 09, 2021 10:06 am Post subject: |
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"But there is no "stereo sound controller chip" ... and there probably never will be".
I don't know the history of sound cards (I'm deaf in one ear and tone deaf in the other, with tinnitus my constant companion, so never really had much use for the best sound cards), but it can't have been much later that dedicated sound chips had become the norm, albeit originally on cards with other logic.
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My graphics card database can be found at http://www.gpuzoo.com.
I can resist anything except temptation.
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Thu Sep 09, 2021 1:36 pm Post subject: |
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I'm also deaf on my right ear and hard of hearing on my left ear. So, we are in the same boat with the stereo system  |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Wed Sep 15, 2021 8:04 am Post subject: |
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Here are these kits availble for these 80188, 80186 and 80286 microprocessors.
Source: Intel Corporation, "NewsBit: Low-Cost Intel Microprocessor Design Kit Available Through U.S. Distributors", Solutions, November/December 1984, Page 1. |
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cvandijk
Joined: 21 Jul 2016
Posts: 3589
Location: Netherlands
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| Posted: Wed Sep 15, 2021 8:08 am Post subject: |
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| Nice prices for those kits lol |
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