I took a look just in the Peripherals dir in m100sig Most of these *seem* to be more about saving 5k than compatibility.
https://computerarchive.org/files/mirror/web8201.com/web8201files/M100SIG/Lib-09-Periferals/ 09-dx.txt says: BOOT.BA Text, Bytes: 465, Count: 238, 26-Oct-86 Title : Keywords: BASIC 100 DVI DISK DRIVE VIDEO INTERFACE BOOT RESET This neat utility allows you folks with Disk/Video Interfaces to load or unload your disk operating system with no loss of files that are in memory. Now when you hit the road with your Model 100 you can gain a quick extra 5K of memory by unloading DOS and then you can re-load it on your return. Checksum: 5,258 ... [70210,445] D100.BA Text, Bytes: 1290, Count: 361, 24-Dec-84 Title : Keywords: BASIC 100 DVI DISK DRIVE SWITCH CHOICE This program allows your to switch DVI Disk BASIC on or off, in the Model 100. An update of the previous program, CHOICE.BA. See the instructions in the file D100.DOC. Checksum = 72,284 [70210,445] D100.DOC Text, Bytes: 825, Count: 325, 24-Dec-84 Title : Keywords: BASIC 100 DVI DISK DRIVE SWITCH CHOICE Documentation file for D100.BA PA=106 ... [71056,613] Neil Wick DISABL.DVI Text, Bytes: 50, Count: 106, 28-Oct-86 Title : Keywords: BASIC 100 CALL DISABLE DVI DOS OS MAXRAM Ultra-small no-frills program to disable DVI operating system in Model 100. Switch to LCD screen before running. "RUN40" to reload Disk Basic. Tested with View80 on UR2 and works fine. Checksum=2540 ... [70506,1473] DVI.100 Text, Bytes: 85, Count: 174, 29-Mar-86 Title : Keywords: BASIC 100 KILL BOOT DVI DISK OPERATING SYSTEM UTILITY RELOAD DVI.100 kills the DVI operating system when the DVI is not available and frees the 4697 bytes of RAM for other uses. If it is run again when the DVI is available, it will boot (re-load) the DVI operating system provided that sufficient RAM is free. DVI.100 leaves all RAM: files intact! Notes: (1) After booting the DVI operating system reset the M100's clock/calendar. (2) If the M100 seems to lockup, press RESET and try again. Checksum 5,129 ... (These next two together essentially do what I thought I remembered reading about. One disables ts-dos and enables dvidos, the other does the opposite.) [70235,232] Woods Martin L-DVI.100 Text, Bytes: 1445, Count: 281, 26-May-86 Title : Keywords: BASIC 100 PDD TDD TANDY PORTABLE DISK DRIVE POWR-DISK TS-DOS Selectively enables and disables D/VI software, preserving date and time during conversion. On enable, first disables POWR-DISK or TS-DOS software for the Tandy Portable Disk Drive should it be in use. Defaults to 80 x 24 display--see line 48. On enable, at first Menu display, select L-DVI AGAIN to automatically preserve date and time. Checksum 95,123 PA=79 /\ /\ /'`\ /'`\ ')(`woods')(` . L-TSD.100 Text, Bytes: 100, Count: 124, 26-May-86 Title : Keywords: TDD DISK BASIC TS-DOS DVI UTILITY 100 Short program to load TS-DOS. First it disables D/VI DOS if it is in use and then does a RUNM of TS-DOS.CO which in turn loads and runs DOS100.CO from disk. Checksum 5,843 (this also looks important wrt dvi compatibility, though it's not strictly about switching between dosses...) [70506,1473] MAXRAM.DVI Text, Bytes: 350, Count: 100, 24-Apr-86 Title : Keywords: BASIC 100 DISK DRIVE DVI MAXRAM SET POKES MAXRAM.DVI pokes a new MAXRAM value into the DVI operating system. Useful for protecting permanently installed machine code form being inadvertently clobbered by a CLEAR statement. <<mike safonov>> Checksum 24,019 (and this too, looks like it hints at something, as though dvidos were incompatible with 0menu or something...) [75735,176] PG64K.DVI Text, Bytes: 750, Count: 95, 06-Aug-85 Title : Keywords: DVI PG-DESIGNS SCREEN SWITCHER This is designed to keep you from going nuts when using the D/VI with PG Designs 64K RAM module. (AHA!) [75735,176] SWITCH.DSK Text, Bytes: 1660, Count: 185, 20-Jul-86 Title : Keywords: BASIC 100 TDD DVI POWR-DISK PGD SUPER TANDY DISK DRIVE This is a utility to switch both TDD and D/VI drivers in and out with a minimum of fuss. Provision for P.G. expansion RAM. Documentation included herein. Checksum: 125,308 -- bkw On Tue, Feb 19, 2019 at 4:00 PM Josh Malone <[email protected]> wrote: > On Tue, Feb 19, 2019 at 3:21 PM Greg Swallow <[email protected]> wrote: > > > > All: > > > > A bit premature in claiming compatibility between TS-DOS and DVI-DOS. I > was able to load a file (SPREAD.BA) from mComm via TS-DOS as expected. > After saving the DO to BA I started the DVI boot process. I was then able > to save the BA to 1: without a single hick up. Unfortunately when I went > back to TS-DOS from MENU it was not and returned to the menu with REXMGR > back. Not as compatible as I hoped, but better than others. > > > > Thanks for the test! So, it seems that both DOSes cannot co-exist. > There's probably a reasonable way to switch between them > non-destructively, though. > -- bkw
