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CharlieFrown

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  1. CharlieFrown

    Mac Rominator issue

    Hi, I have a Mac Rominator installed in my Plus, I get the customized chime, welcome screen, but when I press "R" the Mac gets suspended on Welcome to Macintosh screen. Anyone had similar problem?
  2. CharlieFrown

    ROMBUS - 64 MB flash interface for Mac Plus

    count me in! Interested.
  3. CharlieFrown

    Turbo SE accelerator

    68HC000 cpu's are used in modern accelerators for Amiga, they are capable of running at 50 mhz(!). Would love to see HC based turbo for 512k/Plus.
  4. CharlieFrown

    Mac Plus and 2 MB floppy drive

    Hi, 1) is there any chance the Plus will be working with SONY MP-F75W-01G floppy drives? I am pretty sure HD (1.44 MB) formats are not available because of older IWM chip, but what about ability to format disk as 400k or 800k? 2) Can I use the stepper motor from the MP-F75W-01G inside the older 53W drive? Thanks
  5. CharlieFrown

    Best games/apps to showcase B&W mac?

    anyone has a list of games that run on unexpanded Mac 128k?
  6. I am pretty sure the reason of the sad mac is faulty rom chips. Cleaning and reseating them wont do, after 30 years those chips detoriate even they dont show any sign of corrosion. All you need to do is burn replacement roms on couple of 27c512 eproms. PM me if you need them.
  7. CharlieFrown

    400k Drive Repair Guide - A Call to Arms!!!!!!

    interesting, I have a hunch the caps might be the reason my 800K drives do not work at all. Do you have caps list for 800K drives as well?
  8. CharlieFrown

    800k Floppy drive question

    Despite lubricating and cleaning the drives, they show no signs of life. Checked those switches too. Any ideas? If my IWM chip is bad will I be able to boot from external drive?
  9. CharlieFrown

    Macintosh SE with horizontal lines, no chime

    examine the pins underneath the mobo - might be bent in the way they cause short circuit. Sounds strange, but I had the recapped SE/30 with the same issue.
  10. CharlieFrown

    DIY Mac512k 1 MB modification

    hi, has anyone tried this before? Check out Classic Mac Tech Docs, v2.0 page 28. "9.2 How to Upgrade the Mac 512K to 1MB (and beyond?...)
  11. CharlieFrown

    800k Floppy drive question

    do you think I could use 800k drive from the SE with my Plus?
  12. CharlieFrown

    800k Floppy drive question

    Hi, I have two 51W floppy drives, which have the same issue - do not respond at all, no spinning, no clicking, checked the eject motor gears and seems ok. Cleaned the head. Nothing. Nada. No idea what I should do next. Maybe the stepper motor is dead? BTW I used two different yellow striped cables.
  13. CharlieFrown

    Macintosh Plus reboot in a loop or vertical bars

    Yesterday I replaced the original ROM chips (giving me the identical bars) with two 27c512 containing Plus ROM images. Works perfectly, chimes, no bars, boots to desktop. I can confirm that the vertical bars are usually caused by faulty memory or ROM chips.
  14. CharlieFrown

    Macintosh Plus reboot in a loop or vertical bars

    I have a Plus with pretty much the same vertical bars, when I swap the ROMs with the MacRominator it boots just fine.
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