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shiraz.txt
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1986-09-18
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- BLITTER ST -
An ST system with hardware blitter was demonstrated at the ATARI
Fest recently. It was using an early blitter, that had some bugs in
the hardware. The demonstration was designed to circumvent the bugs,
while a new blitter is in the works. Atari's chip supplier is behind
schedule, but should have a new bug free blitter out by mid September.
The blitter upgrade, consisting of a blitter chip in the same size
package as a 68000, and 6 new ROMS should be available for the general
ST owning public by early December.
No technical details will be available for the blitter itself
until Atari has all patent applications taken care of. You can
expect a 300 to 500% speedup in most graphics operations in software on
your ST. No price for the upgrade has been set at this time, but you
can expect $80-$100 as a reasonable number.
The blitter upgrade will be fairly simple. It will be soldered
piggyback to the 68000 microprocessor, with 4 pins bent out. Those 4
pins will be attached to certain places on the mother board with
jumper wires. Then you need only replace the TOS roms with the new
set. According to Shiraz Shivji, all software out for the ST now
should run unmodified on a hardware blitter ST. You may have a little
trouble playing some of your games, however, since they will speed up
significantly.
- IBM ST -
The IBM PC Box for the ST, contrary to some rumors, is NOT in
production at this time. The case for the product is still in
tooling. Apparently the design of the hardware has been finalized,
however. Shiraz tells me that the main circuit board WILL NOT have
slots, like the IBM PC. There will be room for installing a 5 1/4"
dirve if you wish. If you want to load and run PC software in 3 1/2"
format, you just put it in the 3 1/2" drive on your ST. The ST then
provides the information to the PC box, through the DMA channel. The
ST's DMA channel is the communication link for everything from the
keyboard to display, for the PC Box. You can think of the ST as being
graphics adaptor, asynchronous, printer, and disk controler cards in
an IBM PC. The real trick is making the PC Box significantly
compatible with the IBM PC. All the "interrupts" on the IBM PC for
I/O functions must be vectored through the ST, which performs the
required tasks. The biggest problem with this product to date has
been making the software compatible.
The box will come with 512K of RAM with sockets for an additional
256K. It will be configurable as an off board ramdisk for the ST,
when you aren't using the Box as an IBM PC.
This should be out in 2-3 months. I expect that Atari is hoping
to make it to market with the IBM Box and the Blitter upgrades in time
for the Christmas buying spree. You can expect strong showings of
both hardware products at the November Comdex in Las Vegas.
Stay tuned folks, we'll keep you posted!
Mat*Rat - ANALOG Computing