plouff@nac.dec.com (Wes Plouff) (11/05/88)
First, hats off to Brad Fowles! It's not ugly at all. Cheap, yes, ugly, no. The DSACK tuning seems a minor weakness in an excellent effort. Herewith a few short comments... - Brad recommends storing the unused 68000 chip in styrofoam. That's a real static electricity no-no. Use conductive foam, black and crumbly or pink and bubbly. Even though 68000s cost only $12 or so, this is a dumb way to lose one. - In urging Commodore to produce a "68030 for Amiga 2000," Chris Gray (myrias!cg) says: >We hear stories on the net that Commodore has a 33 MHz 68030 card for the >Amiga 2000 running. >Is something along this lines the reason why they haven't released the > 68020 card yet? After all, it's 14 MHz doesn't seem like a lot, especially > now that there is a public domain one (LUCAS) that's faster than that for > considerably less money. Higher clock speed is not the only way to get performance. Fast memory and 32-bit memory each add significant performance to a 68020 system. When the memory "granddaughter" card is available, then make a comparison. Until then, I'd bet on the Commodore card. Hal Hardenbaugh's columns in _Programmer's Journal_ and elsewhere have explained this memory bandwidth problem. - How should the jumpers (next to U4 on the schematic) be connected? Aw, why not, another question... - With superfast RAM installed through the DIN connector, how will short memory cycles (about 2 clocks on the Amiga bus) affect the regular Amiga timing circuits, especially the Chip RAM multiplexing? -- Wes Plouff, Digital Equipment Corp, Littleton, Mass. plouff%nac.dec@decwrl.dec.com "All the popular bugs in the RAM-Handler were fixed in Version 1.3." Amiga Enhancer Software Manual, page 1-17