Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83 based; site houem.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!houem!marty1 From: marty1@houem.UUCP (M.BRILLIANT) Newsgroups: net.micro.trs-80 Subject: What makes the Model 4 work? Message-ID: <405@houem.UUCP> Date: Fri, 1-Nov-85 15:53:29 EST Article-I.D.: houem.405 Posted: Fri Nov 1 15:53:29 1985 Date-Received: Sun, 3-Nov-85 05:00:27 EST Organization: AT&T Bell Labs, Holmdel NJ Lines: 21 I am using a Model III and a Model 4, both cassette systems. As such, the Model 4 runs only in Model III mode. The Model III is being used as an intelligent terminal, but I would like a bigger display if I could get it cheap. With disk drives and the right DOS, the Model 4 would do certain things the Model III can not do, such as display 24 lines of 80 columns each, and address 64K of RAM. I do not know how this is done. I don't think it really depends on having disks; more likely, it depends on sending the right flags to the right ports. Can anybody tell me what the trick is? Alternatively, there is a diskware product called Supermod4, for a Model 4 running a Model III DOS, that enables the 80x24 screen but still allows ROM+48KRAM addressing. Can this product be adapted to cassette use? M. B. Brilliant houem!marty1 39 McCampbell Road Holmdel, NJ 07733 (201)-946-8147 AT&T-BL Holmdel, NJ (201)-949-1858