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Apple Techstep I have almost all of the ROMs here and some info!
Posted by: elemenoh on 2022-03-07 11:58:39 Also I built a Mouser cart for everything except the 512K-bit EPROMs (is there a modern replacement?). https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=b06767472b @SuperSVGA Can you double-check that I have the right components in there?
Posted by: jajan547 on 2022-03-07 14:44:19 I believe you can use an (MX) 27C1000QC-15 or AM27C512 (AM27C512-70s is more ideal but all seem to work)
Posted by: jajan547 on 2022-03-07 14:44:53 Nice work @elemenoh
Posted by: elemenoh on 2022-03-07 15:03:37 I fixed some geometry on the top enclosure and made the lower enclosure too. I even added a little Easter egg. I'll try to print these out in the next day or two to see if they work.
Posted by: elemenoh on 2022-03-07 15:11:21 And to clarify, 1 M-bit can work fine with any ROM? Would AT27C010-70JU-T work for all? There's decent stock of those on Mouser at the moment.
Posted by: jajan547 on 2022-03-07 20:38:08 No 1MB is for 3 and 4 and 512k is for the açaí he tests, cpu tests 1 & 2
Posted by: jajan547 on 2022-03-07 20:38:39 No 1MB is for 3 and 4 and 512k is for the açaí he tests, cpu tests 1 & 2 SCSI hdd tests
Posted by: jajan547 on 2022-03-07 23:23:30 And to clarify, 1 M-bit can work fine with any ROM? Would AT27C010-70JU-T work for all? There's decent stock of those on Mouser at the moment. Hey so I made this quick little comparison, as you can see pinouts should match so I think it would work for the 1MB ROM images.
Posted by: elemenoh on 2022-03-08 09:48:58 First try was a bit off, but I'm close. Printing a revision now.
Posted by: Skate323k137 on 2022-03-08 09:56:09 Nice!
Posted by: jajan547 on 2022-03-08 10:10:09 First try was a bit off, but I'm close. Printing a revision now. View attachment 39204 That looks super good, you rock! We just gotta fix the pin connector on the gerbers and we are alls eat and can start working on making Roms for different macs.
Posted by: elemenoh on 2022-03-08 15:20:08 @jajan547 I'm recreating the labels too. Can you post some high quality photos of the Volumes 2-4. Please position the carts as level as possible and use the reticle on your phone to make sure it's level too. I'm trying to nail the kerning as closely as possible to the originals. These will still need some adjustment but are pretty close.
Posted by: elemenoh on 2022-03-08 17:02:43 Version 2 geometry works. Just need to tweak the press fit dims to better cope with imprecise 3D printing. Regardless, the enclosure did come together and fits into the TechStep just fine.
Posted by: jajan547 on 2022-03-08 17:20:37 I do not have them but can probably find the images
Posted by: jajan547 on 2022-03-08 17:44:34 here is everything except for CPU Tests Vol.4 I have also provided the labels for the TechStep floppies.
Posted by: jajan547 on 2022-03-08 17:46:02 Here are the .sit files for the TechStep Floppies.
Posted by: SuperSVGA on 2022-03-09 00:41:53 Here's the updated boards. Hopefully dimensional accuracy is still good on the new connector footprint. I'm waiting to get another board to test with now, should hopefully be this week. I've also ordered a solder stencil this time so I don't just have to spread paste and pray. The 1Mbit boards have /PGM pulled high for some PROMs that requires it.
Posted by: jajan547 on 2022-03-09 01:14:58 Here's the updated boards. Hopefully dimensional accuracy is still good on the new connector footprint. I'm waiting to get another board to test with now, should hopefully be this week. I've also ordered a solder stencil this time so I don't just have to spread paste and pray. The 1Mbit boards have /PGM pulled high for some PROMs that requires it. Awesome we should be perfect here I’ll order boards and confirm operation and then from there try and tool out how to make some new ROMs for other computers, awesome work everyone I cannot thank you all enough!
Posted by: olePigeon on 2022-03-09 14:42:36 I had these already made. TechStep floppy labels on an Avery 5196 template. I'll have to upload the jewel case inserts later.
Posted by: jajan547 on 2022-03-09 18:50:07 I had these already made. TechStep floppy labels on an Avery 5196 template. I'll have to upload the jewel case inserts later. Fantastic Work!
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