Kaypro 4 '84 (81-015) - Revision history

FrankRahman at 18:50, 1 January 2026

2026-01-01T18:50:40Z

← Older revision		Revision as of 18:50, 1 January 2026
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	[[File:K4 84 in office.jpg\|400px]]		[[File:K4 84 in office.jpg\|400px]]
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			[[File:K4 81-015 label.jpg\|400px]]

	[[Media:Kaypro 4 84 Welcome Packet.pdf\|Kaypro 4 Welcome Packet]]		[[Media:Kaypro 4 84 Welcome Packet.pdf\|Kaypro 4 Welcome Packet]]

2025-12-26T00:40:56Z

← Older revision		Revision as of 00:40, 26 December 2025
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			Both the Kaypro 2 and 4 received major updates as the New Year came in 1984. The three significant updates for the Kaypro 4:
			* The floppy drives were updated to half height drives, they were still Double Sided Double Density. This required an update to the design of the case for the smaller drives. The new drives were also direct drives and in general were much more reliable than the proceeding full height drives.
			* The mainboard was updated to the universal board that would be shared among the new CPM machines for the rest of Kaypro’s production. This board usually was only populated with the circuitry required for that particular model. It appears that a Kaypro 10 board sometimes was used, likely when they didn’t have the correct board on hand.
			* The screen graphics from the Kaypro 10 became a part of the Kaypro 4. This is implemented as an additional chip on the main board.

			All of these updates made the Kaypro 4 become more like the earlier Kaypro 10 just without the hard drive.


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2025-12-04T23:41:40Z

← Older revision		Revision as of 23:41, 4 December 2025
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	[[Media:Kaypro 4 84 Welcome Packet.pdf\|Kaypro 4 Welcome Packet]]		[[Media:Kaypro 4 84 Welcome Packet.pdf\|Kaypro 4 Welcome Packet]]

			==End of production==
			<blockquote>
			The KAYPRO II is dead, long live KAYPRO.

			The KAYPRO II and the KAYPRO 4 have been discontinued.<br>
			(Kugram, Mar-Apr 1985)
			</blockquote>

2025-10-13T07:57:46Z

← Older revision		Revision as of 07:57, 13 October 2025
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	[[~~File~~:Kaypro 4 84 Welcome Packet.pdf]]		[[Media:Kaypro 4 84 Welcome Packet.pdf\|Kaypro 4 Welcome Packet]]

2025-09-09T23:25:33Z

← Older revision		Revision as of 23:25, 9 September 2025
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			[[File:Kaypro 4 84 Welcome Packet.pdf]]

2025-08-16T04:09:47Z

2025-08-16T03:48:17Z

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