joevt's latest activity
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.I wish I had bothered to look at the Figure 5.2 that Figure 8.5 was pointing to when I was looking at Figure 8.5 the first time.
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Jjoevt replied to the thread PowerMac 7100 and Linux.I believe it's an actual Apple Open Firmware implementation that uses some info from System 7.5 (search for >hwinit). I don't know how...
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Jjoevt replied to the thread PowerMac 7100 and Linux.Apple did make a Open Firmware for NuBus Power Macs. It's part of the Copland boot process. It is loaded by System 7.5 and uses some...
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.Congrats on solving the problem! The LS166 did appear to be shifting bits correctly - all characters being displayed had all bits...
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Jjoevt replied to the thread MFM Floppy Drives?.Open Firmware does contain code for MFM drives. Open Firmware, 2.0.2 for PM 4400 and 7220 can choose between a MFMfloppy device and a...
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Jjoevt replied to the thread Important question, Can I use a single pump if one LCS pump is broken!!!!!.I don't know anything about that. The PCBs from DIYINHK are not mentioned in the air cooling links I posted. They are mentioned here...
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Jjoevt replied to the thread Cpu0 and cpu1 help needed..I have no info regarding G5 air cooler compatibility with G5 liquid cooled CPUs. I linked some air cooling threads at #9
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Jjoevt replied to the thread Important question, Can I use a single pump if one LCS pump is broken!!!!!.These are the recent ones: https://forums.macrumors.com/threads/because-i-can-air-modding-a-quad-with-pc-coolers.2427612/...
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Jjoevt replied to the thread Important question, Can I use a single pump if one LCS pump is broken!!!!!.There's a couple Quad G5 air cooling threads on MacRumors. They use third party air coolers - 92 mm.
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Jjoevt replied to the thread Cpu0 and cpu1 help needed..MacRumors has a couple recent threads on converting a Quad G5 to air cooling.
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.The point of setting all the bytes in the text to all the same value is so that you can find that byte value on the bus. You're saying...
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.Here's another test program. Change the value in line 5 to any bit pattern or character you think might be helpful. 5 TEST = 255-64 10...
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.I think so. Do you mean the IOU at E5? I guess if you're done looking at all the traces to the Video ROM at F4 then sure, try the IOU...
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Jjoevt replied to the thread SOLVED Apple //e with PAL composite video displaying issue.This is a better test: 10 HTAB 1:VTAB 1: PRINT " `Aa": PRINT PEEK(1024) " " PEEK(1025) " " PEEK(1026) " " PEEK(1027) I tested it at...
