VT78 - lots of questions

From: Jeff Hellige <jhellige_at_earthlink.net>
Date: Sun Dec 31 13:34:01 2000

>With such machines, having more than 640K RAM is not that uncommon. I
>have an Apricot with 960K RAM (the remaining 64K in the 1Mbyte address
>space of the 8088 is the video RAM and BIOS EPROMs). And yes, MS-DOS on
>that machine uses all the available RAM.

        TRS-80 Model 2000's can easily be expanded up to 768k, though
I no longer remember exactly how it's version of MS-DOS 2.XX used the
additional memory other than as a RAM disk. On a standard Tandy
machine with Tandy parts, you could have 256k on the mainboard and
two 256k expansion cards in the card chasis. I believe Envision
Designs had a modification that allowed 896k total (256k on the
mainboard and one modified RAM expansion card with 640k on it). The
graphics card didn't share any of the system RAM.

       Collector of Classic Microcomputers and Video Game Systems:
                      Home of the TRS-80 Model 2000 FAQ File
Received on Sun Dec 31 2000 - 13:34:01 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:32:51 BST