jhood@biar.UUCP (John Hood) (09/24/89)
I have a Tandy 4000, with a rev C1 motherboard. When I bought this machine, about a year ago, Tandy was not supporting 80387s in this machine. In the new catalog, I see that they are now. Is this because they came out with yet another motherboard or because of the D-step 386s they're getting now? Does the C1 motherboard have the fix for using '387s with the B-step CPU? On another note, what's the current BIOS revision for the T4K? --jh -- John Hood, Biar Games snail: 10 Spruce Lane, Ithaca NY 14850 domain: jhood@biar.uu.net bang: anywhere!uunet!biar!jhood Looking for a OS hacking programming job in the Ithaca area...
root@gak.UUCP (09/25/89)
/* Written 6:57 pm Sep 23, 1989 by biar.UUCP!jhood in gak:comp.sys.tandy */ /* ---------- "Tandy 4000 revisions" ---------- */ I have a Tandy 4000, with a rev C1 motherboard. When I bought this machine, about a year ago, Tandy was not supporting 80387s in this machine. In the new catalog, I see that they are now. Is this because they came out with yet another motherboard or because of the D-step 386s they're getting now? Does the C1 motherboard have the fix for using '387s with the B-step CPU? On another note, what's the current BIOS revision for the T4K? --jh John Hood, Biar Games snail: 10 Spruce Lane, Ithaca NY 14850 domain: jhood@biar.uu.net bang: anywhere!uunet!biar!jhood /* End of text from gak:comp.sys.tandy */ The rev C boards are in the 25-5000A Tandy 4000s. This version should NOT have a 287 socket & will only have a functional 387 socket. D step CPUs are labeled 80387DX on the CPU. Rev C boards require a BIOS of 1.3.3 or greater. Rev A boards were only used in the Tandy 4000. Rev C & later were used in the 4000 & the 4000LX. As a note, Rev As had both sockets, but only the 287 socket properly functioned. Also, Tandy tried very hard to make the manuals match the mother boards. If you have a C board in a 25-5000A, the manual should say it will only take a 80387. Gary Kueck