We have 68060 adapters for 68040 socket, why don't we have a 68040 adapter for 68030 socked? Seems to be technically possible as per below. Is anyone working on one perhaps? I can see serious interest from the Amiga community in this option for their 030 cards, as long as the orientation fit in 500/2000 for starters.
Came across this little 68030 to 68040 adapter thing for I think X68030....
Seemed to be for something specific, but it exists. Immediate thought of all the 68030 that would be replaced by this in an Amiga.
Searched the subject quickly and found this:
Actually, the Motorola "MC68040 Designer's Handbook" (MC68040DH/AD),
a snazzy slip-cased 3-ring binder, contains a section entitled "MC68040
to MC68030 Bus Adapter Application".
There's a complete schematic with part numbers, and equation files for
all the PALs in the design. In short, it describes 100% of the necessary
hardware. There are some limitations; some of the bus interface
protocols are necessarily different, but these can be overcome with
the addition of some firmware and/or system software patches.
That's the rub... NONE of the necessary firmware/software is provided.
Paragraph 7.1.1, "Software":
"System software issues include differences in the memory management
structure, internal cache initialization and management, software
emulation of unimplemented floating-point instructions, emulation of
unsupported instructions, and the exclusion of the instruction
continuation exception model (i.e., bus error)."
The design requires the following chips:
MC88195 clock generator
6 PALs (3*22V10, 20R8, 16R8, 16R6)
9 TTL logic packages (74F139, 74AS20, 74AS32, 74AS00, 74F64, 74AS821,
74AS257, 2*74AS573)
8 bus buffers (74F543)
plus various passive components.
Now... maybe this is irresponsible speculation, but in the Mac Zone
ad in the July 1991 "MacWorld" magazine, there's a nice color picture
of a product called Magellan, from Total Systems. This is an
040 accelerator for the SE/30 or IIsi. (IIci and IIfx models are
promised but no prices are listed.)
It appears to me to have a special oscillator module, 7 PALs, 8
74FCT543's, and miscellaneous logic and passive components.
Could this be the Motorola circuit? Are they using some sort of INIT
to patch the system? I don't know. The product is reasonably priced,
but it's out of my range for the moment, and I have a IIcx anyway.
groups.google.com
How awesome would such a thing be? And it was clearly done and worked as a finished product already and even Motorola thought about it...it appears. Hmmmm...I wish I had the skills!
EDIT: ....and here it is! I wonder what the connections are all about. At first glace looks like power plus perhaps a by-pass and indicator. Meaning, this board looks all fully self contained "plug-n-play" type of device.
Came across this little 68030 to 68040 adapter thing for I think X68030....
Seemed to be for something specific, but it exists. Immediate thought of all the 68030 that would be replaced by this in an Amiga.
Searched the subject quickly and found this:
Actually, the Motorola "MC68040 Designer's Handbook" (MC68040DH/AD),
a snazzy slip-cased 3-ring binder, contains a section entitled "MC68040
to MC68030 Bus Adapter Application".
There's a complete schematic with part numbers, and equation files for
all the PALs in the design. In short, it describes 100% of the necessary
hardware. There are some limitations; some of the bus interface
protocols are necessarily different, but these can be overcome with
the addition of some firmware and/or system software patches.
That's the rub... NONE of the necessary firmware/software is provided.
Paragraph 7.1.1, "Software":
"System software issues include differences in the memory management
structure, internal cache initialization and management, software
emulation of unimplemented floating-point instructions, emulation of
unsupported instructions, and the exclusion of the instruction
continuation exception model (i.e., bus error)."
The design requires the following chips:
MC88195 clock generator
6 PALs (3*22V10, 20R8, 16R8, 16R6)
9 TTL logic packages (74F139, 74AS20, 74AS32, 74AS00, 74F64, 74AS821,
74AS257, 2*74AS573)
8 bus buffers (74F543)
plus various passive components.
Now... maybe this is irresponsible speculation, but in the Mac Zone
ad in the July 1991 "MacWorld" magazine, there's a nice color picture
of a product called Magellan, from Total Systems. This is an
040 accelerator for the SE/30 or IIsi. (IIci and IIfx models are
promised but no prices are listed.)
It appears to me to have a special oscillator module, 7 PALs, 8
74FCT543's, and miscellaneous logic and passive components.
Could this be the Motorola circuit? Are they using some sort of INIT
to patch the system? I don't know. The product is reasonably priced,
but it's out of my range for the moment, and I have a IIcx anyway.
68040 for 68030 substitution (question)
groups.google.com
How awesome would such a thing be? And it was clearly done and worked as a finished product already and even Motorola thought about it...it appears. Hmmmm...I wish I had the skills!
EDIT: ....and here it is! I wonder what the connections are all about. At first glace looks like power plus perhaps a by-pass and indicator. Meaning, this board looks all fully self contained "plug-n-play" type of device.
X68030 040turbo MPUアクセラレーター - Yahoo!オークション
X68030用 040turbo MPUアクセラレーター です。動作品から外しました。LEDケーブルは再結線お願いします。取り付け等のサポートは出来ません。
auctions.yahoo.co.jp
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