Apple TechStep Replacement ROMs, cartridges, software, and more!

[sarnau]

These #188 development ROM Packs are indeed special: they are missing the required checksum and copyright and should not be accepted as valid ROM Packs by a standard TechStep. They contain beta versions of the existing ROM Packs and as such are historically interesting, but are not useful for actual usage.

Filename : TechStep CPU Tests #188 ROMpak.bin
Name : CPU Tests, Vol.1
Copyright :
ROM Pack Model Id : 0x526
Version : 1.0b (0x1006001)
Creation Date/Time : 09/14/9118:25:00
Banks : 2 (64kb ROM)


Filename : TechStep SCSI HD #188 ROMpak.bin
Name : SCSI ROMPack
Copyright :
ROM Pack Model Id : 0x513
Version : 1.0b (0x1006001)
Creation Date/Time : 09/30/9100:00:00
Banks : 0 (0kb ROM)

vs. the actual ROM Packs:

Filename : TechStep_CPU_Tests_VolumeI_v1.1.1.bin
Name : CPU Tests, Vol.1
Copyright : APPLE COMPUTER,INC., 1991,1992
ROM Pack Model Id : 0x667
Version : 1.1.1 (0x1110000)
Creation Date/Time : 12/05/9102:16:00
Banks : 2 (64kb ROM)

Filename : TechSetup_SCSI_HD_Tests_v_1.0.bin
Name : SCSI HD Tests
Copyright : APPLE COMPUTER,INC., 1991
ROM Pack Model Id : 0x69
Version : 1.0 (0x1000000)
Creation Date/Time : 12/04/9123:13:45
Banks : 2 (64kb ROM)

 

[jajan547]

These #188 development ROM Packs are indeed special: they are missing the required checksum and copyright and should not be accepted as valid ROM Packs by a standard TechStep. They contain beta versions of the existing ROM Packs and as such are historically interesting, but are not useful for actual usage.

I agree very buggy. They do work on normal TechSteps though in case you want to try. Very neat findings! The TechStep is just such an interesting part of Apple’s history.

 

[jajan547]

I posted an update HERE with all the user guides, troubleshooting guides, and documentation I have.

 

[sarnau]

Thank you so much for that!

 

[jajan547]

Thank you so much for that!

Absolutely