hubble@cae780.UUCP (04/08/87)
I just received my floppies this past weekend. I have a PC/AT Clone built by ATronics which can run either at 6Mhz or 12Mhz with 1 Mbyte memory. Minix came up fine and appeared to have only a few problems. I used the 640K PC version. BTW, I copied my original Minix floppies with Diskcopy and experienced no problems. The copies were used for all further Minix investigations. My graphics device is the Megagraph Plus EGA clone. It should be no surprise that I experienced the same problems others have already reported (After several screens of text, only blanks are printed until the last viewable characters disappear off the top of the screen, then the missing characters magically appear). After a little investigation, it is clear that the EGA clone handles the Video Origin differently than Minix expects. First of all, there appears to be more that 16K bytes of RAM there and the video line being refreshed does not wrap around at the end of RAM. I am in the process of changing the way Minix does it's scrolling (I'll post the changes if there is interest). Since Minix takes over keyboard interrupts, I am unable to get to 12Mhz mode (it takes a CNTL-SHIFT-\). If anyone knows how, let me know. And finally, I have a Seagate ST4906 80 Mbyte hard disk which totally confuses Minix. That will take a considerable revamp of at_wini.c. If anybody has already done it, I would appreciate hearing about it. Thanks in advance. Larry R. Hubble tektronix!hubble@cae780.UUCP
bdale@winfree.UUCP (Bdale Garbee) (04/12/87)
In article <3730@cae780.TEK.COM> hubble@cae780.UUCP (Larry Hubble) writes: >After a little investigation, it is clear that the EGA clone >handles the Video Origin differently than Minix expects. >First of all, there appears to be more that 16K bytes of >RAM there and the video line being refreshed does not wrap >around at the end of RAM. I am in the process of changing >the way Minix does it's scrolling (I'll post the changes if >there is interest). Please post the changes. I'll be very curious to see if this also fixes the same symptoms on my Toshiba T1100+ laptop... in addition to the fact that a friend here has an AT/EGA with the problem. Thanks. -- Bdale Garbee, N3EUA phone: 303/593-9828 h, 303/590-2868 w uucp: {bellcore,crash,hp-lsd,hpcsma,ncc,pitt,usafa,vixie}!winfree!bdale fido: sysop of 128/19 packet: n3eua @ k0hoa, Colorado Springs