Model 56SLC's - any good for anything?
Russ Blakeman
pooter/printer biz to spite the taxman and get my wife's wholesaleto retail
biz to a running start - I'll definitely have time to re-explore the
moutnains of machines I have out there (30 ft x 10 x 8ft tall full except a
walkway) and besides the crappy 55SX's I'm parting and donating the rest to
a local metals scrapper - I have a lot of 56SLc units, I believe they are 95
series, they also might be 85 sereis, I have to look again. Anyway most are
in good shape cosmetically, just wondering if they are worth powering up to
try and sell/trade...
- remove !@#$&change$tos William R. Walsh
respectably given some patience. The IBM 386SLC is basically a 486SX.
Also has a nice small form factor case, onboard SCSI that makes life lots
easier, and much more expandable memory wise than the average 55. Might make
a decent Linux box or perhaps some kind of network router or firewall.
William
Gereon Wenzel
It's more a 386sx with internal cache design, thats why it has 16 Bit
only.
the 486sx just lacks the copro and is real 32 Bit.
56 series are small and handy, that makes them perfect match for some
router/server project.
Eg using LINUX or some old Netware they make a perfect TR/Evilnet router
and can
be set up with dialup, firewall, proxy and printserver capabilities too.
Gereon
David L. Beem
> > The IBM 386SLC is basically a 486SX.
> It's more a 386sx with internal cache design, thats why it has
> 16 Bit only. the 486sx just lacks the copro and is real 32 Bit.
suspend mode. 24-bit Address bus, 16-bit external Data bus. 8Kb internal L1
cache. Able to run all Intel 486SX instructions. Model-Specific Registers
(MSR) to control CPU function. Low-power design. No internal clock
multiplying. Usually clocked at 20MHz to directly replace a 386SX. CPUID
A301h ('A' is IBM, '3' is CPU Family, '0' is clock multiplying, '1' is mask
revision).
IBM 486SLC2: 386SX pinout with addition of some pins for cache control &
suspend mode. 24-bit Address bus, 16-bit external Data bus. 16Kb internal L1
cache. Able to run all Intel 486SX instructions. Additional Model-Specific
Registers bits to control more CPU functions than the 386SLC. Low-power
design. Internal clock doubling at 40 or 50MHz. CPUID A421h or A422h.
IBM 486SLC3/486DLC2: PQFP 386DX pinout with addition of some pins for
cache control, suspend mode, & CPU bus width modes. Hardware pin switchable
between 24-bit Address bus/16-bit external Data bus or 32-bit Address/Data
bus. 16Kb internal L1 cache. Able to run all Intel 486SX instructions.
Additional Model-Specific Register from the 486SLC2. Low-power design.
Internal clock tripling at 60, 75, or 100MHz. CPUID A439h in 486SLC3 mode.
To answer Russ's initial question, if the units are marked as "56slc"
then they are the 8556 with an 386SLC-20 CPU. 8556 models (either the '56SX'
or '56slc') can be upgraded with a 486SLC2 (run at 40MHz internally) or
486SLC3 (60MHz internally) daughtercard. 9556 models are either a 486SLC2-50
(upgradable to the 486SLC3 daughtercard, run at 75MHz) or 486SLC3-75 on the
planar (in all of these the middle digit of the submodel will tell the
original stock processor).
8556 have one serial port (DB-25) on the planar, with TI video. 9556
have two (DB-9) serial ports with XGA-2 video on the system planar. 8556
will have the SCSI hard drive (40 & 80Mb are common, the last digit of the
submodel will tell) mounted below the floppy, making drive additions more
challenging. The 9556 models have the hard drive on a suspended tray off the
PSU, leaving the front bay open for a SCSI CD-ROM drive. Only 9556 models
have the "LogicLock" power interlock system that can easily be bypassed.
The Model 56 is a heavy brick for it's size. But then again the case is
very durable (I had one unit shipped to me in a box slightly longer so the
front & rear could be padded, but the circumference was snug against the box
walls. It survived intact). It was viewed as a replacement for the common
(Russ knows *how* common) 55SX. On eBay they seem to be hit-n-miss nowdays.
David
Da...@gilanet.com
Russ Blakeman
"William R. Walsh" <!@#$wwalsh@mch$i.com - remove !@#$ & change $ to S>
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Russ Blakeman
85 and 95 series 56's to get rid of and yeah they are heavy. I think they'd
survice shipping without a box except for the finish.
"David L. Beem" <Da...@gilanet.com> wrote in message
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