https://forum.vcfed.org/index.php?threads/galaxeus-new-dos-bare-metal-arcade-engine-gives-solid-78hz-78-fps-on-a-386-sx-cpu-hi-res-544x480-on-slow-8-bit-isa-std-vga.1258384/
Would this be something significant for the 9533?
Louis Ohland wrote:
https://forum.vcfed.org/index.php?threads/galaxeus-new-dos-bare-metal-arcade-engine-gives-solid-78hz-78-fps-on-a-386-sx-cpu-hi-res-544x480-on-slow-8-bit-isa-std-vga.1258384/
Would this be something significant for the 9533?
Louis Ohland wrote:
https://forum.vcfed.org/index.php?threads/galaxeus-new-dos-bare-metal-arcade-engine-gives-solid-78hz-78-fps-on-a-386-sx-cpu-hi-res-544x480-on-slow-8-bit-isa-std-vga.1258384/
Louis Ohland <ohland@charter.net> wrote:
Would this be something significant for the 9533?
Louis Ohland wrote:
https://forum.vcfed.org/index.php?threads/galaxeus-new-dos-bare-metal-arcade-engine-gives-solid-78hz-78-fps-on-a-386-sx-cpu-hi-res-544x480-on-slow-8-bit-isa-std-vga.1258384/
Well, the 9533 has a quite capable CPU in it (a 50Mhz Blue Lightning)
using 60ns or 70ns FPM RAM (two cycles of the 25MHz external bus) on a not-so-capable ISA 8MHz bus.
However, the XGA(-2) on the PS/2 E is attached some "funny" way, because
it certainly performed a lot better than a typical ISA Super VGA would.
Maybe that was just the XGA acceleration fooling me, but it had no
problems at all keeping up with software rendered M-Motion in 16-bit
direct colour.
With that said, this project probably isn't too relevant to the PS/2 E
since it managed to be a lot faster than a typical 386SX and in
particular has a much more capable video system. It's actually a bit of
a genius design - the only thing slow are peripherals that are dog-slow anyway, like the IBM 54G0135 drive, spinning just over 3,600 RPM and
running at about 1MB/sec.
Stacked up next to an MCA bus ThinkPad 720, the PS/2 E's video system performed substantially better than the 720's MCA-attached WD video
chip... the same cannot be said for the ESDI drive in the ThinkPad 720, probably because that drive could actually do DMA.
Incidentally the PS/2 E was a tragedy when they were being liquidated at
Best Buy... 4MB machines with 1MB spent on the video subsystem, booting
OS/2, and just swapping like crazy to a laptop-speed drive doing
programmed I/O. A 71F7010 4MB upgrade made the thing actually usable.
Could it be directly CPU bus attached? I would guess it would show up
in a particular way if it was ISA attached.
With that said, this project probably isn't too relevant to the PS/2 E since it managed to be a lot faster than a typical 386SX and in
particular has a much more capable video system. It's actually a bit of
a genius design - the only thing slow are peripherals that are dog-slow anyway, like the IBM 54G0135 drive, spinning just over 3,600 RPM and running at about 1MB/sec.
Stacked up next to an MCA bus ThinkPad 720, the PS/2 E's video system performed substantially better than the 720's MCA-attached WD video
chip... the same cannot be said for the ESDI drive in the ThinkPad 720, probably because that drive could actually do DMA.
Incidentally the PS/2 E was a tragedy when they were being liquidated at Best Buy... 4MB machines with 1MB spent on the video subsystem, booting OS/2, and just swapping like crazy to a laptop-speed drive doing
programmed I/O. A 71F7010 4MB upgrade made the thing actually usable.
Kevin Bowling <kevin.bowling@kev009.com> wrote:
Could it be directly CPU bus attached? I would guess it would show up
in a particular way if it was ISA attached.
I have guessed that it was, but I haven't touched a PS/2 E in the flesh
since the late 1990s.
"Spiritually" I suspect it derives a lot from the Model 35 SLC design,
which had a 84F7985 IBM SVGA which looks to be attached to a local bus.
The PS/2 E was positioned to be "premium", hence why it had the faster
XGA-2 versus the cheap SVGA chipset.
(Didn't some Mod. 30s and Mod. 45s use the same planar as the PS/2 E?)
With that said, this project probably isn't too relevant to the PS/2 E
since it managed to be a lot faster than a typical 386SX and in
particular has a much more capable video system. It's actually a bit of
a genius design - the only thing slow are peripherals that are dog-slow
anyway, like the IBM 54G0135 drive, spinning just over 3,600 RPM and
running at about 1MB/sec.
Stacked up next to an MCA bus ThinkPad 720, the PS/2 E's video system
performed substantially better than the 720's MCA-attached WD video
chip... the same cannot be said for the ESDI drive in the ThinkPad 720,
probably because that drive could actually do DMA.
Incidentally the PS/2 E was a tragedy when they were being liquidated at >>> Best Buy... 4MB machines with 1MB spent on the video subsystem, booting
OS/2, and just swapping like crazy to a laptop-speed drive doing
programmed I/O. A 71F7010 4MB upgrade made the thing actually usable.
The 9545 used the 9540 case and the 9533 sysboard.
Josh Rodd wrote:
Kevin Bowling <kevin.bowling@kev009.com> wrote:
Could it be directly CPU bus attached? I would guess it would show up
in a particular way if it was ISA attached.
I have guessed that it was, but I haven't touched a PS/2 E in the flesh since the late 1990s.
"Spiritually" I suspect it derives a lot from the Model 35 SLC design, which had a 84F7985 IBM SVGA which looks to be attached to a local bus.
The PS/2 E was positioned to be "premium", hence why it had the faster XGA-2 versus the cheap SVGA chipset.
(Didn't some Mod. 30s and Mod. 45s use the same planar as the PS/2 E?)
With that said, this project probably isn't too relevant to the PS/2 E >>> since it managed to be a lot faster than a typical 386SX and in
particular has a much more capable video system. It's actually a bit of >>> a genius design - the only thing slow are peripherals that are dog-slow >>> anyway, like the IBM 54G0135 drive, spinning just over 3,600 RPM and
running at about 1MB/sec.
Stacked up next to an MCA bus ThinkPad 720, the PS/2 E's video system
performed substantially better than the 720's MCA-attached WD video
chip... the same cannot be said for the ESDI drive in the ThinkPad 720, >>> probably because that drive could actually do DMA.
Incidentally the PS/2 E was a tragedy when they were being liquidated at >>> Best Buy... 4MB machines with 1MB spent on the video subsystem, booting >>> OS/2, and just swapping like crazy to a laptop-speed drive doing
programmed I/O. A 71F7010 4MB upgrade made the thing actually usable.
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