Do we know anything about the actual lineage of Lego Logo? Is it derived from some other Logo implementation? The reason I ask is because at least with Apple Logo there are hooks implemented for assembly language (at least according to page 238 of http://www.virtualapple.org/docs/Apple%20Logo%20II%20Reference%20Manual.pdf) It's possible that such hooks also exist for Lego Logo if it were derived from some less child-oriented implementation (i.e. present in the upstream but not documented in Lego's docs). Devin On Tue, Jan 17, 2017 at 9:49 PM, Douglas Crawford via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
On 1/17/2017 7:06 PM, Evan Koblentz via vcf-midatlantic wrote:
This is getting to be what may be an insurmountable challenge. The Logo in question is Lego Logo, and the disk is in a non-standard format, as I discovered when I tried to convert it with ciderpress (I wanted to use a very nice disassembler I found for the IIgs). The disk is self booting, so even if I can get the code into a disassembler, writing changes back to a usable format is going to be a major challenge. So far I have not found a way to do it.
Changed subject line to match thread fork.
Yikes that's perhaps a show stopper for modifying the executable file. At best a program would patch the in memory image after the boot of LEGO, which also will be tricky.
-- Devin J. Heitmueller http://www.devinheitmueller.com