| Title: | AMIGA NOTES |
| Notice: | Join us in the *NEW* conference - HYDRA::AMIGA_V2 |
| Moderator: | HYDRA::MOORE |
| Created: | Sat Apr 26 1986 |
| Last Modified: | Wed Feb 05 1992 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 5378 |
| Total number of notes: | 38326 |
I recently purchased a 16Mhz 68020 accelerator card for my A500 from Solid
State Leisure in England.
I'm having some problems with it and I thought you guys might have some
suggestions.
First off I bought the board without the 68020 and 68881 co-processor
as I have several 020's and can't afford a 68881 at the moment .It comes
with 1 Meg of 32bit memory which is expandable via DIP's to 4 Megs.
The board is very small and fits into the A500's 68000 socket , it has no
68000 fall back mode. It does feature shadow Rom where the kickstart Rom
can be copied to 32bit ram so the system routines are speeded up. This is not
done with an MMU but some other custom remap circuitry.
The most important program on the disk that you get is allocmem it is simular
to Davy Haynies SetCPU program which is also included on the disk. If anyone
knows if allocmem is used on any other accelerator such as Hurricane or CSA
I'd be interested. There are several keywords used with allocmem to select
the appropriate board functionality. I've listed these below ..from the
disk documentation file (without permission) such as they are.
-----------------------------------------------------------------------------
The keywords are.
KICK:- Copies ROM kickstart into RAM , enables mapping.
AUTO:- Doesn't ask yes or no.
RESIDENT:- Adds a small program to the RESIDENT code list ,to allocate
the memory automatically after a boot , to enable the kickstart
mapping, (if req.), and to install the TRAP code on MOVE SR.
TRAP:- Enables auto trapping of any MOVE SR instructions.
NORAM:- Does not allocate any memory to the system.
CACHE:- Will turn cache off.
DELAY:- Causes a 2 second delay, on reset, to allow slow A590/A2090 drives
to respond to the faster 68020 processor.
BOOT:- Reboots the machine so that all system libraries will be loaded into
fast ram.
---------------------------------------------------------------------------
Now for the problem .
I find I can use any of the abouve combination of keywords but I must always
use the "NORAM" keyword with allocmem ( this prevents any subsequent programs
being run in 32bit ram ).If I don't select "NORAM" I get "NOT A DOS DISK"
requesters when I try to do anything that involves the hard disk.
Even just trying to do a dir or list (which are stored on DH0:c/).
The type of hard disk I have is an HDA-506 set up this is simular to ALF
and other A500 disk systems that allow an IBM controller (OMPTI 5520) to be
plugged into the A500 expansion connector through a little intermediate PCB.
I have had 2 RD53's running on this system for a couple of years now without
an ounce of trouble. I suspect the disk error (when 32 bit ram is enabled)
is something todo with the hard disk driver being copied into the 32bit ram.
I've tried editing the mounlist entry for the hard disk so that bufmemtype
was set to chip ram but this didn't have any effect (I still get the "not
a dos disk" error when doing anything that accesses DH0:.)
Does anyone have any suggestions of things I could try?
Also does anyone know of a utility on the net that will allow me to see
where in ram (chip/fast/or 32bit) a task is loaded.
If anyone is interested I can post some benchmarks so-far but I'm not sure
how meaningfull they are without 32bit ram enabled.
Steve..
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 4054.1 | WELSWS::FINNIS | Fri Aug 31 1990 20:10 | 17 | ||
Yes Please Post Bench Marks.... Especially on your RD53 set up...
Does this problem also happen with floppys, ?
Does your driver work Ok with the '020 do you know ?
Not sure if ARTM (Amiga Real Time Monitor .. or something like that )
gives what you want..
Try a Floppy boot up from your originals and take it form there ..
- Pete -
| |||||
| 4054.2 | Benchmarks on the 20 card and HDA-506 | MEALA::COLLINS | STEVE | Wed Sep 12 1990 10:46 | 85 |
I've managed to run programs on the "20 board" in 32 bit memory by
first copying the prog to ram: or vd0: then enabling the 32 bit ram.
This works fine as long as I don't make any attempt to access the hard
disk.
I'm going to upgrade to the new A5000 board from Solid State Leisure
which supercedes the "20 card", It has 68000 fall back and is 25 to 30
percent faster than the 20 card .I spoke to the SSL sales person and he
assures me the A5000 will work with my HDA-506 hard disk setup. He says
the difference is the bus timming has changed and that the A5000 card
is "MORE" asynchronous than the 20 card and will wait for slow cycles
to complete.
Here's some benchmarks I ran with 32 bit ram enabled but no 68881 .
CPU_MEMY Benchmark version 2.01
Relative performance X4.52
MIPS 20 card 4.166
68000 0.815
lucas (no cache) 0.917 mips
lucas (cache on) 5.263 mips
CPUSPEED Amiga system information v1.0
average 491% faster.
DHRYR
time for 50,000 passes 34 secs
=1470 dhrystones/sec
DHRYNR (non register variable version of above)
(results same as abouve)
SPEED 10,000 iterations in 211 ticks
3.32 X speed of normal Amiga
1.10 X speed of A2620
SIEVE 20 card 100 iterations in 12.40 secs 1899 primes
Hurricane 11.6 secs
A2620 13.62 secs
CSA CPU 17.22 secs
midget 26.00 secs
68000 44.58 secs
CRAMDEN SI
4.8 X A1000
15.8 X IBM XT
CRAMDEN SI 2
5.6 X A1000
OSIEVE
100 in 5 secs
-------------------------------------------------------------------------
I also managed to run diskspeed V2.0 on my Spirit HDA-506 hard disk
setup with 2X RD53's. With 68000 and 20 card with 32 bit ram enabled.
(I can't figure how diskspeed could access the disk with 32 bit ram
enabled) any way here's the results for anyone interested.
Diskspeed v2.0 Intensity set to medium
A = 68000
B = 20 card with 32 bit ram enambled and rom shadowing on.
Buffer size 512 4096 32,768 262,144
processor A B A B A B A B
Bytescreate 62,267 83,755 147,735 156,067 234,236 257,122 244,032 297930
Bytes write 69,166 94,636 153,305 158,649 295,471 353,343 350,896 394467
Bytes read 53,572 55,695 153,772 155,434 308,428 353,514 333,322 395339
processor A B
files create/s 21 26
open/close /s 28 34
scan /s 100 108
delete /s 26 32
seek/read /s 192 250
Steve..
| |||||
| 4054.3 | Can you post SSL's number?? | COMICS::HOGGAN | No, I am not kidding !!! | Wed Sep 04 1991 08:20 | 1 |