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#Amiga on my floor
7 messages in this thread
Bela … Right you are on the 68020, but you *can* just "drop in" a 68010
if you have V1.1 s/w according to Bob P. at CBM (opening the Amiga case
voids your warranty though).
The CSA '020 board is $1480 (quantity of ONE); $1985 with the 256K.
I dunno about *triple* though … this from Louis Mamakos on USENET just
today (he visited CSA and ran a few benchmarks while there):
These are 3 Dhrystone runs with (1) 32-bit integers without register
variables; (2) 32-bit integers with register variables; and (3) 16-bit
integers with register variables. The three Amiga configurations tested
were (A) standard Amiga; (B) CSA '020 board with the '020's cache enabled;
and (C) CSA '020 board with cache enabled *and* the extra 256K RAM enabled.
Std Amiga 68020 w/cache 68020 w/cache and RAM
32-bit/no reg 458 515 781
32-bit/reg 458 515 657 (??)
16-bit/reg 549 588 781
Louis hypothosized about the anomoly: "it is possible that the data may
not have gathered with the 68020 instruction cache enabled."
The main point though is that Amy is in dire need of a good (well-optimized)
C compiler. The Std Amiga numbers are nearly identical with the Dhrystone
numbers provided by Dale Luck (of CBM) for native Lattice C. Dale also
reported 850 Dhrystones for the same source-code cross-compiled on a Sun
with the Greenhills C compiler (850 is in the same ballpark as the ST
runs). Then, if the compiler were optimized for the 68020 chip, we might
see performance of around 2.5 times the Std Amiga (at 7.1+ MHz).
Finally, CSA is reportedly working on a 14.3 MHz version of their board,
and will market it as "Turbo Amiga". Who needs a Sun …..
/kim
P.S. For more information on Dhrystone's, see my upload DHRYSTON.DOC in
DL7 of PCS-155.
* Reply:
2317
Kim, the 3x figure was from what CSA quoted me. I guess I should have known
not to believe that. It does seem very strange that the improvement is so
minimal, though. You know, the $14xx board is ready to run at 16MHz, provided
that's the rate of the 68000 it's replacing (it's a generic 68K replacement
board). All they're doing to create this 'Turbo Amiga' version, I would
imagine, is making sure all the bus timings and stuff are correct when they run
the board at double the system clock rate. Keeping the NTSC video happy and
all that is the hard part. The CPU's raring to go. – Bela
There is a new player in the 68020 piggy-back-board business! I talked to
Tom Sargent, Persident of "IO Inc." today. They have a 68000/68881 board
that replaces the 68000 available. It doesn't have provisions for on-board
RAM or independent (faster) processor clocking like CSA's board does, but
they are about $200 less expensive. They need to either re-spin their board,
or make an "offset-board" to go in-between the 68000 socket and the '020
board for it to fit in the Amiga (they originally developed the board for
other applications). In case you want more info, their address is:
IO Inc. 2430 N. Huachuca Dr. Tucson, AZ 85745 ph: 602-792-0969
Gettin' funner and funner, gang!
/kim
P.S. I'm not associated with IO Inc. or CSA … just passing along the info.
There is a new player in the 68020 piggy-back-board business! I talked to
Tom Sargent, Persident of "IO Inc." today. They have a 68000/68881 board
that replaces the 68000 available. It doesn't have provisions for on-board
RAM or independent (faster) processor clocking like CSA's board does, but
they are about $200 less expensive. They need to either re-spin their board,
or make an "offset-board" to go in-between the 68000 socket and the '020
board for it to fit in the Amiga (they originally developed the board for
other applications). In case you want more info, their address is:
IO Inc. 2430 N. Huachuca Dr. Tucson, AZ 85745 ph: 602-792-0969
Gettin' funner and funner, gang!
/kim
P.S. I'm not associated with IO Inc. or CSA … just passing along the info.
There is a new player in the 68020 piggy-back-board business! I talked to
Tom Sargent, Persident of "IO Inc." today. They have a 68000/68881 board
that replaces the 68000 available. It doesn't have provisions for on-board
RAM or independent (faster) processor clocking like CSA's board does, but
they are about $200 less expensive. They need to either re-spin their board,
or make an "offset-board" to go in-between the 68000 socket and the '020
board for it to fit in the Amiga (they originally developed the board for
other applications). In case you want more info, their address is:
IO Inc. 2430 N. Huachuca Dr. Tucson, AZ 85745 ph: 602-792-0969
Gettin' funner and funner, gang!
/kim
P.S. I'm not associated with IO Inc. or CSA … just passing along the info.
There is a new player in the 68020 piggy-back-board business! I talked to
Tom Sargent, Persident of "IO Inc." today. They have a 68000/68881 board
that replaces the 68000 available. It doesn't have provisions for on-board
RAM or independent (faster) processor clocking like CSA's board does, but
they are about $200 less expensive. They need to either re-spin their board,
or make an "offset-board" to go in-between the 68000 socket and the '020
board for it to fit in the Amiga (they originally developed the board for
other applications). In case you want more info, their address is:
IO Inc. 2430 N. Huachuca Dr. Tucson, AZ 85745 ph: 602-792-0969
Gettin' funner and funner, gang!
/kim
P.S. I'm not associated with IO Inc. or CSA … just passing along the info.
Kim, the 3x figure was from what CSA quoted me. I guess I should have known
not to believe that. It does seem very strange that the improvement is so
minimal, though. You know, the $14xx board is ready to run at 16MHz, provided
that's the rate of the 68000 it's replacing (it's a generic 68K replacement
board). All they're doing to create this 'Turbo Amiga' version, I would
imagine, is making sure all the bus timings and stuff are correct when they run
the board at double the system clock rate. Keeping the NTSC video happy and
all that is the hard part. The CPU's raring to go. – Bela