eharmon
Well-known member
Double checked my II and it has:Based on what @MacOSMonkey provided previously on the SuperMac ROMs thread, and from my observations debugging some of these cards, here's a list grouped by similarity and in chronological order (of the ones I have had access to):
The PDQ+, Thunder 24, Series IV, and Series V that I have handled had almost nearly identical board layouts. Some revisions were different but the revisions I handled were nearly the same.
- Spectrum 24 Series III
- SMT-01 and BSR-02
- Spectrum 24 PDQ
- SMT-01 and BSR-02
- Spectrum 24 PDQ+
- SMT-02 and BSR-03 and SQD-01
- Spectrum 24 Thunder 24
- SMT-02 and BSR-03 and SQD-01
- Spectrum 24 Series IV
- SMT-02S and BSR-03 and SQD-01
- Spectrum 24 Series V
- SMT-02S and BSR-03 and SQD-01
- Thunder II
- SMT-02S and BSR-03 and SQD-01S (not positive on this one)
- SMT-02S, BSR-03, a sticker over the SQD I don't feel like peeling off, and a 50MHz oscillator. The board on higher intellect has a slightly different sticker with a silkscreen sticking out that strongly implies SQD-01S: https://wiki.preterhuman.net/images/0/0e/Thundergx2.jpg
I have noticed in the past that Thunder/24 seems to have a 40MHz oscillator, so I suspect the II runs 25% faster clocks? S is for speed?
@MacOSMonkey My II has a CLK-03.