 No.22586
hap Developer
6 days ago
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Driver notes: System ROM ---------- The GPL interpreter is located in the EPROM as ROM0 (see above). The SGCPU does not contain any GROM, which contain the actual TI operating system and the BASIC interpreter. The GROMs are replaced by the HSGPL card. ==== CAUTION ====: This means that the HSGPL must be properly set up before starting up the SGCPU. Otherwise, the emulation locks up immediately with a BLACK SCREEN. In the real environment, the HSGPL has usually been set up on delivery. In MAME we have to create a suitable HSGPL memory content. Best practice is to start the TI-99/4A console with EVPC support (driver ti99_4ev) with a plugged-in HSGPL and to go through the setup process there. Finally, the nvram files of the HSGPL must be copied into this driver's nvram subdirectory. The contents will be directly usable for the SGCPU. -- I tried that, but ti99_4ev with that card inserted gives a black screen too. Is that one supposed to boot without issue, or is it also a user error? |
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 No.22589
Robbbert Moderator
6 days ago
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So there might yet be an issue, but not the one I was thinking of. Hopefully mizapf might be able to add something, otherwise I'll just close it. |
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No.22636
Robbbert Moderator
1 day ago
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Can't see this going anywhere, so it's being closed. Another thing to add to my notes. |