jim@wheaton.UUCP (Jim Mann) (03/23/89)
Is there a way to force an ibm clone to boot into turbo mode (10 MH)? I would like to have a program to put in the autoexec.bat file that entered <ctl><alt><+>. The language I prefer is TURBO C but assembler would be ok. Thanks. Jim Mann Wheaton College Illinois
garnett@killer.Dallas.TX.US (John Garnett) (03/27/89)
in article <969@wheaton.UUCP>, jim@wheaton.UUCP (Jim Mann) says: > > Is there a way to force an ibm clone to boot into turbo > mode (10 MH)? I would like to have a program to put in > the autoexec.bat file that entered <ctl><alt><+>. The > language I prefer is TURBO C but assembler would be ok. > Thanks. Jim Mann The following 3 short .com programs work on my XT clone. slow.com: switch to normal speed (4.77?) 228, 97, 36, 251, 230, 97, 195 fast.com: switch to turbo speed (10?) 228, 97, 12, 4, 230, 97, 195 switchsp.com: toggle between normal and fast 228, 97, 52, 4, 230, 97, 195 to create .com files from these descriptions you will need to write a short program to write these values to disk. Do not hold me responsible if these program do strange things to your computer. I do not claim that these programs will work on all XT turbo clones. (I did not write these programs - they came from one of the PC mags). -- John Garnett
psb@eecea.eece.ksu.edu (Phil Buckland) (07/04/89)
In article <46200003@attcc.UUCP> you write: > >I am having trouble getting the turbo mode on my XT clone to work now that >I have added 384K on a Zuckerboard to complete the 640K. >Turbo worked fine before the expansion. (It has an actual turbo switch to >select the speed.) Have you made sure that the DRAMs which you added are fast enough? There is a suffix on the part number which specifies the guaranteed access time of the DRAM. The lower the number, the faster the access time. In particular, the DRAMs you added to the Zuckerboard should be at least as fast as the DRAMs already on the motherboard. 4164-15: 150ns 64K X 1 DRAM 4164-12: 120ns 64K X 1 DRAM >The motherboard is a Super K. I had to experiment with the jumpers first to >allow access to the added memory. Got that finally, but no Turbo. >Should I have added the 384K to the motherboard first? (It is full of 64K >chips.) I've tried software switches to no avail. They either do nothing or >lock up the system. If the motherboard is fully populated (eg, no room for any more chips), then you have no worries. If there *is* room on the motherboard for more memory chips, it is a good idea to fill those empty sockets before putting chips on an expansion card. >HELP!! Ask, and you shall receive. Phil Buckland Computer Engineer Kansas State University psb@eecea.UUCP psb@eecea.eece.ksu.edu P.S. Sorry to have had to post. My E-mail to you bounced.
mbb@cbnewsh.ATT.COM (martin.b.brilliant) (07/04/89)
From article <667@eecea.eece.ksu.edu>, by psb@eecea.eece.ksu.edu (Phil Buckland): > In article <46200003@attcc.UUCP> you write: [ the identity of "you" is unknown at this point ] >> >>I am having trouble getting the turbo mode on my XT clone to work now that >>I have added 384K on a Zuckerboard to complete the 640K..... >>The motherboard is a Super K.... My XT clone has a DTK motherboard. Unlike the Super K that "you" has, it is socketed for two banks of 41256 and two of 4164, so it will take a full 640K on the mainboard. A note in the User's Manual says: Do not use RAM memory on the interface card because its original design may not be compatible with the 10 Mhz CPU at access time. Use memory on the mainboard and use 4164 and 41256 access time within 120 ns. The question may be: is the Zuckerboard certified for 10 Mhz? >>..... I had to experiment with the jumpers.... Get the User's Manual and RTFM (Read The Field Manual?). It might help. M. B. Brilliant Marty AT&T-BL HO 3D-520 (201) 949-1858 Holmdel, NJ 07733 att!hounx!marty1 or marty1@hounx.ATT.COM Disclaimer: Opinions stated herein are mine unless and until my employer explicitly claims them; then I lose all rights to them.
mbb@cbnewsh.ATT.COM (martin.b.brilliant) (07/06/89)
From article <46200003@attcc.UUCP>, by dlm@attcc.UUCP: > I am having trouble getting the turbo mode on my XT clone to work now that I have > added 384K on a Zuckerboard to complete the 640K. I tried to answer this by email, and after two failures I decided my comment might be of general interest. Partial answers have already been given. Phil Buckland asked: Have you made sure that the DRAMs which you added are fast enough? Then I suggested: The question may be: is the Zuckerboard certified for 10 Mhz? I got an email message today that seems to confirm that suspicion: I've heard complaints about Zuckerboards not being able to keep up with 8MHz PC 6300's, let alone 10MHz clones. A convoy moves no faster than its slowest ship. M. B. Brilliant Marty AT&T-BL HO 3D-520 (201) 949-1858 Holmdel, NJ 07733 att!hounx!marty1 or marty1@hounx.ATT.COM Disclaimer: Opinions stated herein are mine unless and until my employer explicitly claims them; then I lose all rights to them.
dlm@attcc.UUCP (08/08/89)
I am having trouble getting the turbo mode on my XT clone to work now that I have added 384K on a Zuckerboard to complete the 640K. Turbo worked fine before the expansion. (It has an actual turbo switch to select the speed) The motherboard is a Super K. I had to experiment with the jumpers first to allow access to the added memory. Got that finally, but no Turbo. Should I have added the 384K to the motherboard first? (It is full of 64K chips) I've tried software switches to no avail. They either do nothing or lock up the system. HELP!!