I installed Cutemouse for a mouse driver, which is also much smaller than the MS driver, although I had to use the /R2 switch otherwise mouse acceleration was ridiculously high. I also used their IDE CDROM driver, UIDEJR.SYS which should work with any IDE CDROM and only takes up 768 bytes of memory when loaded- much better than the 27kb or so that OAKCDROM.SYS off with Win98 boot disk was using. I'd say that for the average ISA/VLB games box most people won't have any issues. In certain cases this might not be stable but if you have problems just hit F5 when 'Starting MS-DOS' appears and remove the offending lines. So to use this you'd probably want to disable adapter ROM shadowing in your BIOS (usually its disabled by default anyway). The main thing here seems to be using the adapter ROM shadow region, C800-EFFF for the EMS page frame. This instantly allowed UNIVBE to load high, freeing up a bit of conventional memory. The first thing I tried was using their EMM386 parameters:ĭEVICEHIGH=C:\DOS\EMM386.EXE AUTO RAM M3 A=64 H=128 D=256 HIGHSCAN X=B800-C7FF I=C800-EFFF I=B000-B7FF NOTR One of the guys at the Dosbox forums pointed me to this excellent site: Normally I would have set up a boot menu in CONFIG.SYS to choose from different setups- one for EMS memory, one for XMS, with or without network etc - but this time I decided that I'd rather have a 'one size fits all' config- so I wouldn't have to reboot and choose the correct config each time I wanted to play a different game. I am also planning to install a network card in this box in the future which will further eat into conventional memory when its drivers/protocol stack are loaded. I tried MemMaker but it didn't really help because I was already loading everything high- it just said that my configuration was already optimal. The problem I was having with this box, was that Scitech Display Doctor (UNIVBE) wouldn't load into upper memory when EMS was enabled, thus eating into the lower 640kb of conventional memory. DOS memory management used to be a bit of a black art, but I knew a few tricks to get things running reasonably well. I've built plenty of DOS boxes before although its been a while since I last fiddled around with them. I'm currently building a 486DX2/66 games box with 16MB RAM and DOS 6.22
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February 2023
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