Granlunds FrankenSTein

[agranlund]

Feels great having the machine fully assembled again!

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[frank.lukas]

The reference design in the data sheet seem to imply 1MB is max for the ET4000AX (and so does the driver that comes with nvdi). I'm sure I've heard about 2MB cards for the Atari though.. maybe those were ATI Mach cards?

https://www.microlabs.com/xl2.html

... but the nova driver and nvdi has only support for 1MB W32i cards! And the address space are by 1MB at the VoFa or STGA Adapter only.

W32 and W32P cards not working. It must be a W32i !

The speed is the same as by a ET4000AX ...

[agranlund]

The reference design in the data sheet seem to imply 1MB is max for the ET4000AX (and so does the driver that comes with nvdi). I'm sure I've heard about 2MB cards for the Atari though.. maybe those were ATI Mach cards?

https://www.microlabs.com/xl2.html

... but the nova driver and nvdi has only support for 1MB W32i cards! And the address space are by 1MB at the VoFa or STGA Adapter only.

W32 and W32P cards not working. It must be a W32i !

The speed is the same as by a ET4000AX ...

Thank you @frank.lukas !
I'm not sure you would want to use a video mode that requires 2MB anyway. It all has to go through the rather slow 8Mhz bus after all.


I'll probably put building a ET4000 into the blitter board on hold for a bit and focus on the video mode switcher software for now.
This software, or at least the base of it, could be useful even without an ET4000 - for example when using the UBE switch and run the desktop, or when using a hardware overscan circuit and so on.

[PhilC]

@agranlund I have a 2mb card but can't remember if I also have a 4, perhaps. Ill have to check the chip type etc.

[DoG]

I got some Mach32 and Mach64. Non 4Mb though. Mainly used on TT and MegaSTe.

But I thought I had a ET4000 with more then 1Mb, but I might be confused.
Well, it doesn't matter then, if you can't use more then 1Mb on the ET4000AX. The resolution is quite satisfactory anyway.

[PhilC]

Slowly getting there with the blitter and decoder update to my old STM. Thanks @agranlund .

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[agranlund]

I had some old saved ones:

~7.5MB/s measuring logical drive speed. Direct HW raw access is ~9.5MB/s

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Doesn't really tell you the TT-RAM speed numbers but here's the Gembench:

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There wasn't any saved nembench data in the folder for the TF536 but I had one from the older TF534 @ 50Mhz.
These percentages are in comparison to a Falcon030:

Code: Select all

NemBench v2.1 - precision CPU/FPU profiler.

Integer multiply (16bit)     -> 1.921 Mips (~313%)
Integer divide (16bit)       -> 1.135 Mips (~313%)
Linear (stalled) integer     -> 24.975 Mips (~313%)
Interleaved (piped) integer  -> 24.975 Mips (~313%)

16bit read (100% hit)        -> 24.630 MByte/sec (~313%)
16bit write (100% hit)       -> 14.492 MByte/sec (~240%)
32bit read (100% hit)        -> 49.261 MByte/sec (~313%)
32bit write (100% hit)       -> 28.901 MByte/sec (~433%)

Linear 32bit read (ST-Ram)   -> 3.919 MByte/sec (~73%)
Linear 32bit write (ST-Ram)  -> 3.921 MByte/sec (~60%)
Linear 32bit copy (ST-Ram)   -> 1.964 MByte/sec (~60%)

Linear 32bit read (FastRAM)  -> 30.131 MByte/sec (~566%)
Linear 32bit write (FastRAM) -> 27.976 MByte/sec (~433%)
Linear 32bit copy (FastRAM)  -> 13.988 MByte/sec (~433%)

[Atarian Computing]

This is me:

STacy
EmuTOS
NVDI + Geneva
32GB CF on EmuTOS driver

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This IDE speed is 83% from my Thunderstorm TT reference, which is typically also the difference between EmuTOS driver vs. HDDriver in my experience.

[agranlund]

This is me:

What benchmark tool is that and where can I get it?

[stephen_usher]

These were the Gembench results from my previous TF536, with MAPROM enabled, on a 520STFM and TOS 2.06.

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I had no access to the IDE interface to test that.