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Tube❄️Time

and we have working video! now for the most important question of the day: what version of Mac OS should i put on it?

74 comments
DELETED replied to Tube❄️Time

@tubetime system 7.5

Always worked for me

Tube❄️Time replied to Tube❄️Time

i'm going to create a SCSI disk image for my SCSI2SD using BasiliskII and the instructions at savagetaylor.com/2019/12/19/ho

Jim Murphy replied to Tube❄️Time

@tubetime As a new hire at Apple I authored the 7.5 installer script. I moved on to doing software engineering on the OS by 7.5.3, but that always gives me a nice feeling to see it still running.

Tube❄️Time replied to Tube❄️Time

before i can use the Apple IIe card, looks like i'll need to recap it. 😬

Calyo Delphi replied to Tube❄️Time

@tubetime Nah that's just some unmelted solder paste~ ;p

Jeff Haluska replied to Tube❄️Time

@tubetime I like to think you have a stock room full of capacitors.

Sergio Aguayo replied to Tube❄️Time

@tubetime It wouldn't be fun without recapping 😆

Empathic Qubit replied to Tube❄️Time

@tubetime I recapped my SNES a few months ago to protect it. Unfortunately I think it has some problems with one of the ICs. Graphics are all weird. Also replaced the vreg even though the output from that looked fine.

Tube❄️Time replied to Tube❄️Time

I was having trouble because I was putting the *volume* image into the SCSI2SD rather than the *disk* image. turns out partition tables are important lol

Raj Patel replied to Tube❄️Time

@tubetime Such a comforting boot screen. Diagnosing Extension conflicts not so much.

Tube❄️Time replied to Tube❄️Time

I mean it's a large volume but should it really take an hour to mount?

solient replied to Tube❄️Time

@tubetime wow I forgot all the partition options the Classic era disk formatting tools had.

Tube❄️Time replied to Tube❄️Time

trying something else. unfortunately this didn't seem to work, I suspect the HFS partition needs to come before the ProDOS partitions.

Tube❄️Time replied to Tube❄️Time

well this explains why it was hanging. there's probably some setting on the SCSI2SD that's not exactly right.

Karl Gutwin replied to Tube❄️Time

@tubetime Seeing this is dredging up ancient memories of playing with not-new SCSI gear as a kid… staring at the baroque arrangement of peripherals, utterly confused as to why it wouldn’t just WORK.
Kids these days don’t know they have it so good, what with their “universal serial bus” and all. You don’t even have to worry about device IDs! Or bus termination!

Tube❄️Time replied to Karl

@kgutwin it's still a confusing mess when it comes to USB 3.0/3.1/Gen 1/Gen 2/3.2 Gen 1x2/2x2 and all the weird alternate mode issues.

Tube❄️Time replied to Tube❄️Time

turns out this hang was caused by the SCSI2SD firmware, which was uhh shamefully out of date. with the latest version it works and i can partition the drive!

Tube❄️Time replied to Tube❄️Time

it also turns out that MacOS wants to be the first data partition (i had the two ProDOS partitions first.) but it works now!

Dean Segovis replied to Tube❄️Time

@tubetime Memories of SE30s, Classics and a few Quadras in a graphics shop I worked at in 92. I used Filemaker Pro to manage work flow and create job tickets. Great relational database program.

Tube❄️Time replied to Tube❄️Time

but I still need to repair the Apple IIe card.

Tube❄️Time replied to Tube❄️Time

only had these poscaps hanging around. yes they're very fancy but they'll work.

Tube❄️Time replied to Tube❄️Time

wow, it totally worked! is it an Apple IIe or is it a Performa 475? why not both!

Tube❄️Time replied to Tube❄️Time

i figured out how to change the startup sound to "Quack" which makes me think of the Quapple (my Apple II ISA card that i cloned a while back)

Tube❄️Time replied to Nate

@natemartinsf it's super clean! also dang you're on mastodon too, i will follow you asap

Nate Martin replied to Tube❄️Time

@tubetime I heard all the cool kids are here now!

Tube❄️Time replied to Tube❄️Time

time to check the capacitors on the motherboard. there really aren't that many chips on it! I was also able to remove it without any tools. just bend some tabs and it slides right out.

John Carlsen replied to Tube❄️Time

@tubetime copyright 1982 on the ROM--wow!
Was this unit among the first sold in 1984?

Tube❄️Time replied to John
John Carlsen replied to Tube❄️Time

@tubetime thanks!

I think Apple added the expansion port on the Mac SE; I recall working on a prototype add-on for that port in 1989. I think the port used a conventional DIN 41612 connector; this one looks like a newer, extended version.

Kevin Karhan :verified: replied to Tube❄️Time

@tubetime Definitely a #Macintosh #mainboard:

I've not seen and #PDS "slot" sockets anywhere else...

Tube❄️Time replied to Tube❄️Time

i found a tech manual. this is a very clean design. most things are tidied up into the two big custom chips, MEMCjr and Prime Time.

Tube❄️Time replied to Tube❄️Time

heh, they even put the bus sizing features in this chip. motorola removed that in the '040 (the '030 had it) and it caused innumerable problems for 68k computer designers.

The PrimeTime IC provides the data bus features of the MC68030 that the MC68040 does
not provide. Those features are byte steering, which allows 8-bit and 16-bit devices to be
connected to a fixed byte lane, and dynamic bus sizing, which allows software to read
and write longwords to 8-bit and 16-bit devices. Those features allow these computers to
work with existing I/O software designed for the MC68030.
Tube❄️Time replied to Tube❄️Time

the Commodore folks solved this on their '040 Amiga CPU card by using a raft of ten (10) GALs, which burned a ton of power.

Tube❄️Time replied to Tube❄️Time

the one thing i haven't figured out is this chip.

8pin SOIC chip marked ©90🍎 0120
Tube❄️Time replied to Tube❄️Time

based on the pinout i think it's a 24C01 serial EEPROM, probably for a unique serial number or something.

George R. M. 🇩🇪🇺🇦 replied to Tube❄️Time

@tubetime that's 343S0120, often found alongside the customized 68HC05 Apple calls Egret (Cuda in later models) used for ADB, housekeeping tasks, PRAM, reset (and NMI) management, etc. IIRC '0120 serves as a power monitor, switching the HC05 to battery power when system power is cut.

...as seen here on a 630 DOS/LC580 board.

Tevruden Dawnspear replied to Tube❄️Time

@tubetime I feel like that's the spiritual successor of the SE's BBU which turned a half dozen or so PALs into a single chip

Elosha replied to Tube❄️Time

@tubetime Really clean! I love that they put legacy MOS 8bit VIA clones on chip, just like PC people had Intel 8bit chip clones in their Chipsets ☺️

Tube❄️Time replied to Elosha

@elosha that is a Zilog Z8530, totally different

Elosha replied to Tube❄️Time

@tubetime No, I was talking about the Show Time chip „set“. It integrates two VIAs and even a SWIM (Super Woz I… Machine) floppy controller. Apple IIe personality should feel at home 😄

Tube❄️Time replied to Elosha

@elosha ahh gotcha, i need to investigate that chip more. thanks!

Dru Nelson replied to Tube❄️Time

@tubetime The Apple IIgs was the first to have this tool-less design. I don’t know why that is so. It made working on Apple products so nice.

Travis Geiselbrecht replied to Tube❄️Time

@tubetime Oooh that looks fun. Alas all I have in the classic mac world is a Mac SE with no slots.
But I do have a Apple IIe, so I guess that's second best.

Kevix (he/him) :debian: replied to Tube❄️Time

@tubetime
I'm on a apple ii group on facebook and in the 90s I had a Performa 475 I think but never had the apple II card. There is a mastodon apple program I think?

Travis Geiselbrecht replied to Tube❄️Time

@tubetime Yeah I've had mixed results with the SCSI2SD and random old hardware. A particularly weird one is suddenly the same one I've had forever stopped working on my Microvax. Used to work, now doesn't, no explanation.
Guess I should logic analyze that one.

Piotr Esden-Tempski replied to Tube❄️Time

@tubetime fuzzy feet... not so nice on caps 😬 🦶 💇

davekeogh replied to Tube❄️Time

@tubetime any recommendations for 68000 emulators? I remember using one must be nearly twenty years ago now, but it had a nice gui with the register contents and possibly a few LEDs. Had to build a 68k dsp in college. Would love to play with some assembly again.

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