| ▲ | BasiliskII Macintosh 68k Emulator Ported to ESP32-P4 / M5Stack Tab5(github.com) |
| 71 points by rcarmo 13 hours ago | 13 comments |
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| ▲ | bArray 9 hours ago | parent | next [-] |
| Looking at the M5Stack Tab5 IoT Development Kit [1] based on the ESP32-P4 - it's a really nice piece of kit. [1] https://shop.m5stack.com/products/m5stack-tab5-iot-developme... |
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| ▲ | nottorp 6 hours ago | parent [-] | | Yeah, the first thing I thought of when seeing this was "how long till this tablet thingy will be out of stock everywhere?". |
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| ▲ | zeckalpha 4 hours ago | parent | prev | next [-] |
| Hoping rePalm ends up there, too! https://dmitry.gr/?r=05.Projects&proj=27.%20rePalm |
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| ▲ | jhbadger 3 hours ago | parent | prev | next [-] |
| Pity that this isn't for the Cardputer (a M5Stack device that includes a built in (tiny) screen and keyboard), although it might be impractical on it. |
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| ▲ | swiftcoder 11 hours ago | parent | prev | next [-] |
| How performant is this - are we able to achieve similar speeds as an actual 68k Mac on embedded hardware? |
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| ▲ | vardump 9 hours ago | parent | next [-] | | At 8 MHz, a 68k can execute at most 2M instructions per second. So the answer is going to be yes, if this manages to execute one 68k instruction per ~200 cycles. I think executing an instruction is going to be closer to 20-50 cycles than 200, so it should be much faster than a real 68k CPU. I think performance is likely to be in the ballpark of a 68040 @20 MHz, but that's just a guess. This would leave 20 cycles for each emulated instruction. With JIT you could reach 200 MHz+ comparable speeds. | | |
| ▲ | rasz 7 hours ago | parent [-] | | Everything is coming from PSRAM including frame buffer (at 15 fps) so performance is going to be abysmal. | | |
| ▲ | vardump 7 hours ago | parent [-] | | You should be able to cache hot code and data in the SRAM. Although it'd significantly increase complexity. |
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| ▲ | iamflimflam1 9 hours ago | parent | prev [-] | | The P4 is pretty high spec with a 400MHz dual-core RISC-V | | |
| ▲ | cardanome 5 hours ago | parent [-] | | Especially as there is a decent working BasiliskII port for the PlayStation Portable with its 333MHz single-core MIPS CPU. So this should be much easier. |
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| ▲ | stonogo 3 hours ago | parent | prev | next [-] |
| I note that the vide coding tools managed to keep the license headers in individual files, but the COPYING file containing the GPL2 has not made the transition. |
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| ▲ | anthk 9 hours ago | parent | prev [-] |
| VMac would be lighter. |
