11.2.3 Mighty&Nemesis

MightySonic und die Nemesis-Karte im Falcon

Ein Artikel von
Michael Grove

For 40MHz CPU and 20MHz bus (VGA only)

1).
Connections are normal for Mighty Sonic and Nemesis (like instructions) except for High (Black) CPU clock wire for Mighty Sonic. I used the DSP clock wire from the NEMESIS for the Mighty High CPU clock (32MHZ.PRG). I habe 50MHz oscillator on DPS before, so I do not need the Nemesis DSP clock for DSP.

2).
FPU have problems mit Nemesis clock. This is normal for Nemesis (manual says). He is my fix. It may not work for others. I habe 40MHz 68882 installed. R221 must be removed. Do not connect Nemesis FPU wire. Isolate (shield) FPU clock-in pin from socket. Like the DSP, I install FPU mit own clock oscillator. Connect oscillator to 68882 clock-in pin. I use 64MHz. I tried 40MHz, 50Mhz and they did not work. This was the same without Nemesis. With Mighty at 32MHz, FPU worked best at 64MHz. ?????? This takes some experiments, but 64MHz worked for me.

3).
Clock software switching is important. Maybe I forget. This is what I remember. The Mighty must be getting 32MHz clock from Nemesis before switching to 40MHz (nemlow.prg). When Nemesis is off, normal is 32MHz for DSP (Remember I use DSP for CPU clock). So, 32MHz.PRG (for Mighty) must be run before switching Nemesis to 40MHz (nemlow.prg).

4).
Buffer mod. The Nemesis has a very nice buffer mod. The Mighty works very well with it. There are two modifications that the Nemesis manual says to make that do not work with the Mighty.

One, you place a capacitor across ground and DMA clock-in with
DMA clock wire from buffer. This is for Nemesis only.

Two, you use a resistor (no capacitor) across DMA clock-in and
ground. This is for Afterburner.

These do not work with the Mighty. Only use the DMA buffer
wire to DMA clock in. This works well on the Mighty.

5).
Autofolder
FAFAXX.PRG
NVDI.PRG
32MHz.PRG
Nemesis.PRG
Nemlow.PRG

6).
The Mighty Sonic simms and chips get VERY hot at 40MHz. A fan should be used to keep cool.

The Mighty can run 24/24 CPU/BUS for better TC Video modes (VGA). Run Nemesis at 48MHz, but do not run 32MHz.PRG on the Mighty. Mighty gets 24MHz clock from expansion bus. My FPU will not work in this mode.

I tried to run the Mighty at 48MHz. It would work 1 of 20 times. Not reliable. I habe 50Mhz 68030, but I think the problem is the simm speed/chips on the Mighty. The Mighty runs the whole card at CPU clock speed. Maybe Nemesis mit 42,44,46 MHz clock, I don't know. Aixit Falcon and TT fast ram cards habe same problem. Will not run much over 40MHz.

Special note on Nemesis. Both oscillators must be installed even if you only use one. Nemesis will not work properly if only one is installed.

7).
RGB video. The Nemesis needs to have additional modifications for RGB video to work with 20/24 MHz bus. There are instructions in the Nemesis manual. I tried this, but it did not work for me. Maybe I make a mistake. I don't know..... The Nemesis takes a lot of soldering and cutting:(. It is like the Speed Resolution Card to install.

GEM Bench v4.01             Ofir Gal - 14 Jan 95
============================================
Falcon 030 TOS 4.04
AES v3.40
GEMDOS v0.48
MiNT not present
Blitter Disabled
NVDI 4.11 present
Video Mode: 640*480*2
LineF FPU installed
Run and Malloc from FastRAM
Ref: F030 + FPU, 640*480*2
Mighty Sonic  40/20 CPU/BUS
Nemesis installed FPU mit 64Mhz clock
============================================
GEM Dialog Box:             0.645    542%
VDI Text:                   0.220   1545%
VDI Text Effects:           0.460   1628%
VDI Small Text:             0.270   1388%
VDI Graphics:               1.135    769%
GEM Window:                 0.425    329%
Integer Division:           1.230    252%
Float Math:                 0.185    183%
RAM Access:                 0.815    269%
ROM Access:                 0.815    257%
Blitting:                   0.910    123%
VDI Scroll:                 0.785    336%
Justified Text:             0.930    350%
VDI Enquire:                0.270    585%
New Dialogs:                1.045    425%
============================================
Graphics:                            729%
CPU:                                 240%
Average:                             598%

********************************************************

NemBench v1.0 - precision CPU/FPU profiler.

Integer multiply (16bit)     -> 1.532 Mips (~249%)
Integer divide (16bit)       -> 0.907 Mips (~250%)
Linear (stalled) integer     -> 19.980 Mips (~250%)
Interleaved (piped) integer  -> 19.980 Mips (~250%)

Float multiply (64bit)       -> 0.662 MegaFlops (~250%)
Float divide (64bit)         -> 0.432 MegaFlops (~250%)
Linear (stalled) float       -> 1.288 MegaFlops (~242%)
Interleaved (piped) float    -> 1.288 MegaFlops (~242%)

16bit read (100% hit)        -> 19.704 MByte/sec (~250%)
16bit write (100% hit)       -> 9.940 MByte/sec (~166%)
32bit read (100% hit)        -> 39.447 MByte/sec (~250%)
32bit write (100% hit)       -> 19.920 MByte/sec (~300%)

Linear 256k read (STRam)     -> 6.472 MByte/sec (~123%)
Linear 256k write (STRam)    -> 7.142 MByte/sec (~112%)
Linear 256k copy (STRam)     -> 3.577 MByte/sec (~112%)

Linear 256k read (FastRAM)   -> 21.522 MByte/sec (~409%)
Linear 256k write (FastRAM)  -> 19.176 MByte/sec (~300%)
Linear 256k copy (FastRAM)   -> 6.136 MByte/sec (~192%)
*********************************************************

GEM Bench v4.01             Ofir Gal - 14 Jan 95
============================================
Falcon 030 TOS 4.04
AES v3.40
GEMDOS v0.48
MiNT not present
Blitter Disabled
NVDI 4.11 present
Video Mode: 640*480*2
LineF FPU installed
Run and Malloc from FastRAM
Ref: F030 + FPU, 640*480*2
Mighty Sonic 24Mhz CPU & BUS
Nemesis installed/FPU mit 64Mhz clock
============================================
GEM Dialog Box:             0.745    469%
VDI Text:                   0.280   1214%
VDI Text Effects:           0.615   1217%
VDI Small Text:             0.315   1190%
VDI Graphics:               1.485    587%
GEM Window:                 0.485    288%
Integer Division:           2.055    150%
Float Math:                 0.190    178%
RAM Access:                 0.995    221%
ROM Access:                 0.995    211%
Blitting:                   1.250     89%
VDI Scroll:                 0.840    314%
Justified Text:             1.125    289%
VDI Enquire:                0.325    486%
New Dialogs:                1.280    347%
============================================
Graphics:                            590%
CPU:                                 190%
Average:                             483%

********************************************************
NemBench v1.0 - precision CPU/FPU profiler.

Integer multiply (16bit)     -> 0.921 Mips (~150%)
Integer divide (16bit)       -> 0.544 Mips (~150%)
Linear (stalled) integer     -> 11.959 Mips (~150%)
Interleaved (piped) integer  -> 11.959 Mips (~150%)

Float multiply (64bit)       -> 0.798 MegaFlops (~301%)
Float divide (64bit)         -> 0.518 MegaFlops (~299%)
Linear (stalled) float       -> 1.409 MegaFlops (~264%)
Interleaved (piped) float    -> 1.402 MegaFlops (~264%)

16bit read (100% hit)        -> 11.820 MByte/sec (~150%)
16bit write (100% hit)       -> 6.684 MByte/sec (~112%)
32bit read (100% hit)        -> 23.640 MByte/sec (~150%)
32bit write (100% hit)       -> 13.368 MByte/sec (~201%)

Linear 256k read (STRam)     -> 6.798 MByte/sec (~129%)
Linear 256k write (STRam)    -> 8.115 MByte/sec (~127%)
Linear 256k copy (STRam)     -> 3.998 MByte/sec (~125%)

Linear 256k read (FastRAM)   -> 10.164 MByte/sec (~193%)
Linear 256k write (FastRAM)  -> 12.850 MByte/sec (~201%)
Linear 256k copy (FastRAM)   -> 6.425 MByte/sec (~201%)