Terence Boldt
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ProDOS ROM-Drive v4
This is a peripheral card for the Apple ][ series computers that acts as a read-only solid state disk drive (SSD) all in EPROM. Although it won't run DOS, it is fully ProDOS compatible and will appear as a read-only hard drive even when booting from another drive. It holds 1024 KB of disk data making a full megabyte. The firmware for the card resides in block 0001 that is normally reserved for SOS boot on Apple ///. The drive boots ProDOS and into BASIC in under 1.5 seconds. This is the fourth and latest revision of the board with 4 more blocks than versions 1 through 2.5 and fixes a data buffer issue in versions 2.1, 2.5 and 3.0.
Mar 19,2022
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ProDOS ROM-Drive v4
A 1 MB read-only solid state disk for Apple II computers.
1412
8
3
Published: Mar 19,2022
Download Gerber file 39
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File Last Updated: 2023/12/22 (GMT+8)
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2023-12-2214:18:00
Parts List (BOM) is updated.
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- Dario Loy Jan 09,2024
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More by Terence Boldt
- ProDOS ROM-Drive v4 This is a peripheral card for the Apple ][ series computers that acts as a read-only solid state dis...
- Apple2-IO-RPi v6 PurposeThe purpose of this project is to provide I/O for an Apple II series 8 bit computer via a Ras...
- ProDOS ROM-Drive v3 -- REPLACED with v4 UPDATE: v2.1, v2.5 and v3.0 have a data bus error causing occasional read failures. This is fixed in...
- Apple2-IO-RPi v5 Update: There is a v6 but the only difference is a jumper to select internal (Apple expansion bus) v...
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