David Cook's latest activity
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David Cook replied to the thread Mac II Video glitch.Last night I went through the Macintosh ROM source code to see if there were bug fixes related to this. While there are plenty of fixes... -
David Cook replied to the thread Mac II Video glitch.Have you tried running MacTest Pro? It has tests for the video card as well as the computer itself. I usually click the Deselect All...
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David Cook replied to the thread Mac II Video glitch.This is crazy. Same computer, disk, memory size, video card, slot D, monitor adapter, and monitor. Different results The only...
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David Cook replied to the thread Mac II Video glitch.Attached is a disk image I used on a Macintosh IIx with the same ROM and the same Apple Display Card 8*24 (with the same card ROM as you...
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David Cook posted the thread 8*24 GC incompatible with Display Enabler v2.2.2 in Add-ons, Peripherals & Networking.This is unlikely to be useful information to anyone. However, in the event someone is trying to get around an incompatibility with the...
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.Awesome!
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.@campbellashe Do you have a M5126 backlit Portable? I think you'll want to add a 7MB jumper option, as that model has an address...
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.That's what we suspected. So, if you average the clocks (2 + 6 / 2 = 4) over the entire memory range, you end up with the 50% slowdown...
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.Incredible work! No init needed. The 5120 Portable has a one wait state. You must be driving your 8 MB at zero wait state. That's why...
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.According to Apple's technical note: "Unlike the original Macintosh Portable which required one wait state, the backlit Macintosh...
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David Cook replied to the thread Expansion Memory Cards and Speed Limitations above 5MB on the Macintosh Portable.Let me try to summarize your findings: 1. The slowdown occurs even on a non-backlit Portable. (Previously, I thought this was a backlit...
