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Melkhior's latest activity
M
Melkhior
replied to the thread
Supported PowerMac 6100 L2 sizes?
.
In theory, there's an alternate solution to the many chips implementation mentioned previously, but this would require a much larger...
Mar 8, 2024
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
OK thanks! I started from scratch in KiCad 5.1, where my PDS adapter was, so I redid the schematics there - still need to double-check...
Mar 6, 2024
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
I see that you have betas on the way, do you consider the GitHub schematics "final"? As mentioned, I'm considering a much smaller form...
Mar 6, 2024
M
Melkhior
replied to the thread
Fantasy M88100 Macs
.
It is a nice CPU, and yes it's likely somewhat crippled by small caches - as most CPU would be, the L1 cache size being limited by area...
Mar 3, 2024
M
Melkhior
replied to the thread
Fantasy M88100 Macs
.
The MC88200 aren't CPUs, they are Cache/Memory Management Units for the MC88100 (the first implementation of the MC88000 architecture)...
Mar 3, 2024
M
Melkhior
replied to the thread
Fantasy M88100 Macs
.
Multi-processor (either true SMP or some other schemes like the stuff implement in MP PPC machines under OS9) is mostly a software issue...
Mar 3, 2024
M
Melkhior
replied to the thread
Interware Booster 30-SE50F Info Dump
.
The documentation doesn't make it obvious in any one place, other sources are sometimes clearer. The important bit is a note right at...
Feb 23, 2024
M
Melkhior
replied to the thread
Interware Booster 30-SE50F Info Dump
.
Cost-cutting / didn't read the CPU manual properly (I'm betting the first!) Quoting from the '030 UM on asynchronous bus cycles...
Feb 23, 2024
M
Melkhior
replied to the thread
SEthernet and SEthernet/30: A new take on PDS Ethernet
.
Ouch, that's one massive board for the SE/30 ! I see that in addition to the ATF1502, you switched the Flash from PLCC to TSOP - which...
Feb 19, 2024
M
Melkhior
replied to the thread
SE/30 FPU trouble
.
Maybe some inputs to the GLU are damaged. Normally, to generate /FPU_CS, it needs all three FC lines and A[13..20]. If one or more of...
Feb 18, 2024
M
Melkhior
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
Wouldn't "reliably bad" VRAM (as the boot screen would imply) not allow the display of a clear picture, ever? That's what puzzles me. At...
Feb 17, 2024
M
Melkhior
replied to the thread
NuBusFPGA: HDMI on NuBus Macs
.
Turns out, the MMCM (clocking module) in the 7-series FPGA have a reconfiguration interface (see xapp888), that interface can be exposed...
Feb 17, 2024
M
Melkhior
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
Is that an accelerated card? Is acceleration enabled? Try without if so. To me, the fact that the pictures are drawn fine suggest the...
Feb 17, 2024
M
Melkhior
replied to the thread
IIci etc. ATX to 10pin Adapter
.
Beware, that's not a fork from another design, that's my own and it's slightly different by being mostly SMD (surface mount) and having...
Feb 13, 2024
M
Melkhior
replied to the thread
Help! Type 11 errors after adding FPU to LC III
.
That fake '882 works at 33 MHz? lucky you! Guess it was a "reliability issue with the FPU socket" after all :-)
Feb 12, 2024
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