David Cook's latest activity
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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... -
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...
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David Cook replied to the thread Dynamic Engineering Portable PDS RAM Card.@SuperSVGA is the expert on this. He stated "Any access at all is sufficient, such as a simple tst.w $FC0200 instruction or running DM...
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David Cook replied to the thread New Web Resource: The Visual Catalog of Retro Macintosh Software (a.k.a. a whole lotta icons!).I just checked it out. Perfect.
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David Cook replied to the thread New Web Resource: The Visual Catalog of Retro Macintosh Software (a.k.a. a whole lotta icons!).Cool. Glad you found the issue.
