Jump to content

H3NRY

6502
  • Content Count

    339
  • Joined

  • Last visited

Profile Information

  • Location
    Austin, TX

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. For BEST compact Mac, I'd vote for the SE30. For FAVORITE compact, I have to go with my 128K first Mac, the one that got the Dr. Dobbs 512K upgrade, the one that I developed the 1 meg RAM board for and the internal SCSI hard drive for. That machine was sort of responsible for starting three Mac-oriented companies. For favorite all time Apple, I'd nominate my 1977 Apple ][ which taught me digital circuitry and programming, and brought me into the personal computer business. All these Apples still run, something that can't be said for much 30 to 40 year old consumer electronic gear. Eve
  2. For OS 10.5 up, there's the CLI "memtest" and the GUI front end for it "Rember". http://download.cnet.com/Rember/3000-2094_4-52452.html?tag=mncol;1 Here's a version for earlier OS X (shareware $1.39): http://download.cnet.com/Memtest/3000-2094_4-32926.html?tag=mncol;5 Nearly all benchmark suites have a disk drive test, so pick your favorite.
  3. The easy way to put a hard disk emulator in a Mac 512 is to add one of the SCSI-equipped upgrades and Mac Plus ROMs. From there, add a notebook SCSI drive like I have in mine, or use a SCSI-IDE adapter and a CF card or something like that. You can even beef up the analog board enough to run the drive without an added power supply. No hacking assembly language required. http://web.me.com/henryspragens/stuff/Photos/Pages/Computers.html#10 It wouldn't be a HyperDrive, though, or use any of the HyperDrive parts. If you need HyperDrive source code, you probably will have to disassemble your
  4. Thanks for posting those pictures. Now there IS documentation of an MMI mechanism available. I guess I should post pictures of my old disk drives for reference too. That big list covers some short-lived drive manufacturers, even a couple who never reached production. Different from today with only Seagate and WD in the same flooded industrial park... JDW, I like your "Apple within an apple" avatar. Especially on a cube.
  5. The issue with large SIMMs (over 1 MB) in Mac II and Mac IIx is the video cards. 4 Mb chips added a new test mode, and it happens that the TFB video card would cause signals on the buss which would lock RAM into this test mode. Therefore, 4 MB and larger SIMMs for Mac IIs need a PAL or other device to lock out the problematic RAS / CAS sequence. You DO need a PMMU memory controller to use more than 8 MB, and you need either 32-bit clean ROMs from the FDHD kit or MODE 32. The 32-bit ROMs are compatible with both IWM and SWIM disk controllers. IMHO, unless you've got some of the special RAM on h
  6. Early Apple displays don't use the same scan frequencies as PCs did, so many multi-sync monitors don't work. A few which were compatible with the IBM PGA card (anyone remember the Professional Graphics Adapter?) would stretch far enough to cover Apple's Toby and other cards. Most LCDs are too new for the TFB and PCs' CGA signals. What Apple never documented is the Toby Frame Buffer could output video at NTSC RGB rates, so with an RGB to composite adapter, you could use a TV for display. If you were lucky enough to have an Apple II RGB monitor, you could use it with your Mac II. There was a sho
  7. Excellent! The "slowness" is due to the serial baud rate, it looks like. To get the REAL feel of a remote log-in to a mainframe in the '70s, set your baud rates to 110 or 300 baud. 300 baud was the fastest Ma Bell (the monopoly phone company back then) allowed on her wires. You had to have special permission to wire anything to the phone system in those days, so most modems were acoustic, with rubber cups you stuck a telephone handset into. If you had a wired modem, you had to pay extra, and AT&T assumed you were the size of General Electric and charged accordingly. Networking didn't reall
  8. Dang! Somebody actually used P-Shooters? I figured that was the most obscure gadget I ever worked on. P-Con never got beyond the 2 guys in a garage stage. Perhaps the "CEO" licensed the design to some Australian firm. My personal record for LocalTalk was 10,000 ft of cat 2 twisted pair. We had one guy who had a single pair with a break in it under a freeway that ran through his campus. He used P-Shooters to recover the mangled data and tie the two sides of the campus together. Musta been pretty desperate. Another guy claimed to run LocalTalk from house to barn over a couple of strands of
  9. The video problems are probably on the analog board. Check out the electrolytic capacitor at the top of the board - I forget what it's labeled, but it's the one which always overheats and fails. A search here will probably turn up repair advice. There may be other analog problems if sound is distorted. It's possible you have digital woes, but analog is much more likely for these symptoms. It's possible to run the digital board without the RAM upgrade. Buy a couple of 74LS244s. They are still available through most electronic parts suppliers, and new ones are much preferable to ones desolde
  10. Routers and bridges were available to connect LocalTalk to Ethernet and Token Ring ranging from the Shiva FastPath down to little ones like the Farallon or Dayna Mini-EtherPrint that I use to connect my LocalTalk segment to Ethernet. Routers set up separate zones for each port. Bridges like the EtherPrint have both groups in the same zone. Yes indeed, Shiva was the big noise in Apple networking. Smaller players like Nuvotech always had to test compatibility with Shiva's NetModem, NetSerial, and the big guns like the FastPath. My big network problem right now is that Apple doesn't support A
  11. "Just like Steve Jobs did with his display back in 1984 (at least according to LEM)" Yeah, there isn't enough room in 128K for MacSpeak to say something as long as Mac's first speech. Steve would have had to cut a lot. I well believe he had a Fat Mac. Andy Hertzfeld confirmed the story. Have you ever tried to scroll a picture in MacPaint in 128K and had to swap floppies a couple of times? There's not enough RAM to hold the whole ImageWriter-size page, so it has to be swapped to disk, and virtual memory on floppies is SLOW! A 512K Fat Mac can run MacPaint as Bill Atkinson intended. Still,
  12. The Chooser let you choose a device which wasn't connected directly to your Apple. (Don't forget the Apple II.) It began as a LaserWriter interface, though it had been partially developed even earlier as a LAN within Apple's Fremont factory where Macs built Macs. AppleTalk was a breakthrough in that the computer did the work of establishing a connection, rather than depending on a LAN specialist to plan a network, assign addresses to each device, install special drivers, install and terminate a wiring scheme, and maintain and circulate the list of users and devices. The downside of machines di
  13. SOunds like the power supply voltage is fluctuating with load, as in floppy running or not. Caps are likely culprits, and the whistle may be from the flyback. Most usual problem there is cracked solder due to heat cycling. Reflow the solder on all the transformer joints and other hot parts in any case. If you don't run the machine with loose flyback connections, the transformer will last just about forever. Horizontal retrace lines on the screen may be due to the internal brightness control turned up too far. Proper setting is to turn the user brightness all the way up, then set the internal c
  14. Nice find! Yanno if ya hadna mentioned the RAM here, nobody'd know it was upgraded. Just yer own little secret, and yanno what? It'll run a lot better and crash less with 512K, just between you n me. Very few 128s with good analog boards and working floppies these days. Most need a fair bit of fettling before they work properly.
  15. It's a very nice-sounding CD player (Philips mechanism) but a slow 1st-generation CD-ROM. Most buyers were PowerBook owners who needed a battery-powered portable CD-ROM drive. Good find, especially with all the extras!
×
×
  • Create New...