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Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out
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Melkhior's latest activity
M
Melkhior
replied to the thread
macintosh IIsi 4MB onboard RAM upgrade
.
The speed of chips will not change the performance of the memory subsystem. The IIsi uses synchronous cycle, the timings are based on...
Yesterday at 6:35 AM
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
OK, thank you! So I have the 'right' one, provided the 20 MHz clock of the IIsi doesn't cause issue. IIRC, you tested in a IIfx as well...
Wednesday at 6:52 PM
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
Dumb question - what's the speed grade of the ATF1502AS on those board? That's the one number I didn't double-check before ordering my...
Wednesday at 4:57 PM
M
Melkhior
replied to the thread
Adding 8 slots to my Compact Mac
.
Thank you, that explain a bit. Memory map limits 60000 PDS (SE slot) to one and NuBus slots to 6, while available interrupts on the...
Apr 12, 2024
M
Melkhior
replied to the thread
128 pin PGA sockets for 68030s that don't suck?
.
Paid €3.27 for 300 (allegedly, didn't count them...) on AliExpress. But yes, preci-dip is likely a better/easier option for 'standard'...
Apr 12, 2024
M
Melkhior
replied to the thread
128 pin PGA sockets for 68030s that don't suck?
.
You could always make your own :-) Also, Preci-Dip 510-87-128-13-041101 is in stock at Mouser (France) and much less expensive than the...
Apr 12, 2024
M
Melkhior
replied to the thread
Building PCB in Europe is soooo expensive...
.
Yes, and it's quite frustrating. This particular manufacturer in Germany (aisler.net) used to have a service where they shipped parts...
Apr 11, 2024
M
Melkhior
posted the thread
Building PCB in Europe is soooo expensive...
in
Hacks & Development
.
A simple PDS adapter with 2 slots for the IIci, so just 8 lines in the BoM for SMT (two for resistors, four for capacitors, small switch...
Apr 11, 2024
M
Melkhior
replied to the thread
IIci etc. ATX to 10pin Adapter
.
Those are the correct files, but the pick'n'place file only has the surface mounted components. The two plugs for power (J1, J2) and the...
Apr 6, 2024
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
Turns out, space is really constrained - that 5V plug wouldn't fit, and I'm not sure an ethernet would would on the other side... so as...
Mar 29, 2024
M
Melkhior
replied to the thread
IIsi NuBus adapter being weird but only with one specific video card
.
I wouldn't expect a video device to need 12V, very surprised it did for such a critical function... so it works now in the IIsi?
Mar 23, 2024
M
Melkhior
replied to the thread
IIsi NuBus adapter being weird but only with one specific video card
.
The IIsi power supply and internal circuitry isn't great, so my suggestion it to check the voltage on the 5V rail in all three cases (no...
Mar 22, 2024
M
Melkhior
replied to the thread
Supported PowerMac 6100 L2 sizes?
.
I don't think the chips can do more than 1 MiB out-of-the-box as they don't have the necessary inputs. It might be possible to add...
Mar 11, 2024
M
Melkhior
replied to the thread
LC III & LC 520/550 PDS slot compatibility
.
Yes, the devnote for the 520 says it's the same. Page 30:
Mar 8, 2024
M
Melkhior
replied to the thread
Supported PowerMac 6100 L2 sizes?
.
After I posted that, I found some AliExpress vendor claiming they were selling the 66 MHz version for about $17 each. Between the...
Mar 8, 2024
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