David Cook's latest activity
-
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... -
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...
-
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...
-
-
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...
-
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...
-
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.
-
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.
-
David Cook replied to the thread New Web Resource: The Visual Catalog of Retro Macintosh Software (a.k.a. a whole lotta icons!).Interestingly, for the broken images, they display the text of the link. Whereas the working images display the image.
-
-
David Cook replied to the thread New Web Resource: The Visual Catalog of Retro Macintosh Software (a.k.a. a whole lotta icons!).Really cool! Aside: Doesn't quite work in the Firefox browser.
-
-
David Cook replied to the thread Portable RAM Card 1MB -> 3MB by adding 658128ALFP chips. Is the B revision acceptable?.It works!!! 1 MB onboard + 3MB on the full Apple RAM board. Here is one side of the RAM board with 628128BLFP (to be clear 628128BLFP...
-
