9401-P03 - Revision history

PoC: /* Noise */ Typo

2025-10-14T17:35:56Z

Noise: Typo

← Older revision		Revision as of 19:35, 14 October 2025
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	<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>		<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>

	The original fan ~~fas~~ ball bearings but for unknown reasons, the visible bearing emitted an awful rattling noise. Removing the sticker showed dark smear. Using solvent, I finally could identify this as grease-rust mixture. Since I couldn't remove the snap ring keeping the rotating part of the fan in place, I could not access the inner bearing and chose to exchange the 92 mm fan with a newer, high-quality model with also 25 mm thickness. The machine is much quieter now, even without a resistor. Note, this is a major undertaking. It requires time, patience and creativity because of the way the fan has been locked in place through bent parts of the PSU case.		The original fan has ball bearings but for unknown reasons, the visible bearing emitted an awful rattling noise. Removing the sticker showed dark smear. Using solvent, I finally could identify this as grease-rust mixture. Since I couldn't remove the snap ring keeping the rotating part of the fan in place, I could not access the inner bearing and chose to exchange the 92 mm fan with a newer, high-quality model with also 25 mm thickness. The machine is much quieter now, even without a resistor. Note, this is a major undertaking. It requires time, patience and creativity because of the way the fan has been locked in place through bent parts of the PSU case.

	== Weblinks ==		== Weblinks ==

PoC: Memory details

2025-01-23T09:09:26Z

Memory details

← Older revision		Revision as of 11:09, 23 January 2025
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	The available documentation in the ''CISC System Builder'' Redbook might appear a bit confusing.		The available documentation in the ''CISC System Builder'' Redbook might appear a bit confusing.

	There is a table showing different ''Packages'' of the P03 hardware with different amounts of maximum RAM on PDF page 8. The ordinary P03 has 8 MB soldered to the main board, and features four PS/2 SIMM slots. SIMMs must be added in pairs of two equal SIMMs. The table on PDF page 9 shows features #3117 (two 4 MB SIMMs) and #3118 (two 8 MB SIMMs) only for certain packages. Each of them with a maximum of two. All of these Packages have in common to max out below 56 MB.		There is a table showing different ''Packages'' of the P03 hardware with different amounts of maximum RAM on PDF page 8. The ordinary P03 has 8 MB soldered to the main board, and features two or four PS/2 SIMM slots. SIMMs must be added in pairs of two equal (sized) SIMMs. The table on PDF page 9 shows features #3117 (two 4 MB SIMMs) and #3118 (two 8 MB SIMMs) only for certain packages. Each of them with a maximum of two. All of these Packages have in common to max out below 56 MB.

	PDF page 10 shows features #3159 (two 4 MB SIMMs) and #3160 (two 8 MB SIMMs). The latter with a maximum of three. Since the "stock" board only has four SIMM slots, the board accommodating up to 56 MB RAM must be physically different, and has to have two additional SIMM slots.		One of the machines Supervinx has (see [[#Weblinks\|Weblinks]]) sports only two SIMM sockets, and later screen shots show that this particular system processor card has feature code #2114.

			The other machine of Supervinx, as well as mine presented here, has four SIMM slots, and its system processor card has feature code #2115.

			Another machine I saw, which was maxed out with 56 MB, has feature code #2117 for its system processor card.

			PDF page 10 shows features #3159 (two 4 MB SIMMs) and #3160 (two 8 MB SIMMs). The latter with a maximum of three. Since the "stock" board only has four SIMM slots, the board accommodating up to 56 MB RAM must be physically different, and has to have two additional SIMM slots, or support 16 MB SIMMs. Details are yet unknown.

	== Tweaks ==		== Tweaks ==

PoC: /* Weblinks */ Linkfix

2023-05-21T12:07:22Z

Weblinks: Linkfix

← Older revision		Revision as of 14:07, 21 May 2023
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	== Weblinks ==		== Weblinks ==
	* [https://www.ibm.com/resources/publications/OutputPubsDetails?PubID=REDP004200 AS/400 CISC System Builder], ~~PDF~~		* [https://www.ibm.com/resources/publications/OutputPubsDetails?PubID=REDP004200 AS/400 CISC System Builder], REDP-0042-00
	* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM		* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM
	* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com		* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com

PoC: /* Weblinks */ Link to IBM

2023-05-21T11:48:29Z

Weblinks: Link to IBM

← Older revision		Revision as of 13:48, 21 May 2023
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	== Weblinks ==		== Weblinks ==
	* [https://~~ibmdocs~~.~~pocnet~~.~~net~~/~~REDP-0042-00.pdf~~ AS/400 CISC System Builder], PDF		* [https://www.ibm.com/resources/publications/OutputPubsDetails?PubID=REDP004200 AS/400 CISC System Builder], PDF
	* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM		* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM
	* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com		* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com

PoC: Added memory, reworked

2023-01-02T14:41:59Z

Added memory, reworked

← Older revision		Revision as of 16:41, 2 January 2023
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	[[File:9401-P03-Board-2.jpg\|thumb\|right\|Second (IOP?) board — note the 68EC020-16 processor in the lower right, and the 80286-10 processor in the lower left corner]]		[[File:9401-P03-Board-2.jpg\|thumb\|right\|Second (IOP?) board — note the 68EC020-16 processor in the lower right, and the 80286-10 processor in the lower left corner]]
	The IBM AS/400 '''9401 Model P03''' is a comparatively tiny model. It's still a CISC processor machine, despite having a black case.		The IBM AS/400 '''9401 Model P03''' is a comparatively tiny model. It's still a CISC processor machine, despite having a black case.

			=== Maximum Memory ===
			The available documentation in the ''CISC System Builder'' Redbook might appear a bit confusing.

			There is a table showing different ''Packages'' of the P03 hardware with different amounts of maximum RAM on PDF page 8. The ordinary P03 has 8 MB soldered to the main board, and features four PS/2 SIMM slots. SIMMs must be added in pairs of two equal SIMMs. The table on PDF page 9 shows features #3117 (two 4 MB SIMMs) and #3118 (two 8 MB SIMMs) only for certain packages. Each of them with a maximum of two. All of these Packages have in common to max out below 56 MB.

			PDF page 10 shows features #3159 (two 4 MB SIMMs) and #3160 (two 8 MB SIMMs). The latter with a maximum of three. Since the "stock" board only has four SIMM slots, the board accommodating up to 56 MB RAM must be physically different, and has to have two additional SIMM slots.

	== Tweaks ==		== Tweaks ==
			Things not originally intended by IBM.

			=== Noise ===
	There's not much physical space to lessen its noise emissions by applying dampening pads to the case, or stuffing with noise absorbing material. A little relief can be achieved by disassembling it completely to extract the PSU. You need to drill out the rivets and search for some matching screws in your collection. The fan can be made a bit less noisy with a 27 Ω resistor put in series. Don't expect wonders, though.		There's not much physical space to lessen its noise emissions by applying dampening pads to the case, or stuffing with noise absorbing material. A little relief can be achieved by disassembling it completely to extract the PSU. You need to drill out the rivets and search for some matching screws in your collection. The fan can be made a bit less noisy with a 27 Ω resistor put in series. Don't expect wonders, though.

Line 11:		Line 21:

	== Weblinks ==		== Weblinks ==
			* [https://ibmdocs.pocnet.net/REDP-0042-00.pdf AS/400 CISC System Builder], PDF
	* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM		* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM
	* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com		* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com

PoC: New fan

2022-08-13T11:58:27Z

New fan

← Older revision		Revision as of 13:58, 13 August 2022
Line 7:		Line 7:

	<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>		<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>

			The original fan fas ball bearings but for unknown reasons, the visible bearing emitted an awful rattling noise. Removing the sticker showed dark smear. Using solvent, I finally could identify this as grease-rust mixture. Since I couldn't remove the snap ring keeping the rotating part of the fan in place, I could not access the inner bearing and chose to exchange the 92 mm fan with a newer, high-quality model with also 25 mm thickness. The machine is much quieter now, even without a resistor. Note, this is a major undertaking. It requires time, patience and creativity because of the way the fan has been locked in place through bent parts of the PSU case.

	== Weblinks ==		== Weblinks ==

PoC: Don't know what else to say

2022-06-09T18:42:29Z

Don't know what else to say

← Older revision		Revision as of 20:42, 9 June 2022
Line 1:		Line 1:
	~~{{FIXME\|Add more information}}~~
	[[File:9401-P03-Board-1.jpg\|thumb\|right\|First (main CPU?) board]]		[[File:9401-P03-Board-1.jpg\|thumb\|right\|First (main CPU?) board]]
	[[File:9401-P03-Board-2.jpg\|thumb\|right\|Second (IOP?) board — note the 68EC020-16 processor in the lower right, and the 80286-10 processor in the lower left corner]]		[[File:9401-P03-Board-2.jpg\|thumb\|right\|Second (IOP?) board — note the 68EC020-16 processor in the lower right, and the 80286-10 processor in the lower left corner]]

PoC: More precise.

2022-02-10T17:53:38Z

More precise.

← Older revision		Revision as of 19:53, 10 February 2022
Line 5:		Line 5:

	== Tweaks ==		== Tweaks ==
	There's not much physical space to lessen its noise emissions by applying dampening pads to the case, or stuffing with noise absorbing material. A little relief can be achieved by disassembling it completely to extract the PSU. You need to drill out the rivets and search for some matching screws in your collection. The fan can be made a bit less noisy with a 27 Ω resistor put in series.		There's not much physical space to lessen its noise emissions by applying dampening pads to the case, or stuffing with noise absorbing material. A little relief can be achieved by disassembling it completely to extract the PSU. You need to drill out the rivets and search for some matching screws in your collection. The fan can be made a bit less noisy with a 27 Ω resistor put in series. Don't expect wonders, though.

	<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>		<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>

PoC: New

2022-02-10T17:44:22Z

New

New page

{{FIXME|Add more information}}
[[File:9401-P03-Board-1.jpg|thumb|right|First (main CPU?) board]]
[[File:9401-P03-Board-2.jpg|thumb|right|Second (IOP?) board — note the 68EC020-16 processor in the lower right, and the 80286-10 processor in the lower left corner]]
The IBM AS/400 '''9401 Model P03''' is a comparatively tiny model. It's still a CISC processor machine, despite having a black case.

== Tweaks ==
There's not much physical space to lessen its noise emissions by applying dampening pads to the case, or stuffing with noise absorbing material. A little relief can be achieved by disassembling it completely to extract the PSU. You need to drill out the rivets and search for some matching screws in your collection. The fan can be made a bit less noisy with a 27 Ω resistor put in series.

<blockquote>'''Note!''' 33 Ω or higher values trigger some fan observing circuitry on the PSU board. If it triggers, you'll get the amber LED on front and a SRC 00000003 in the display, after the PSU shut down. This happens within the first few seconds of power on.</blockquote>

== Weblinks ==
* [https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS195-015&infotype=AN&mhq=IBM%20Network%20Station%208361%20Series%20100&mhsrc=ibmsearch_a&subtype=CA IBM Application System/400 Advanced Portable Models] Sales Manual, IBM
* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/01/index.html IBM AS/400 9401 Portable (Model P03)], supervinx.com
* [http://www.supervinx.com/OnlineMuseum/IBM/AS400/9401/P03/02/index.html IBM AS/400 9401 Portable (Model P03) with InfoWindow II], supervinx.com

[[Category: System Internals‏‎]]