On Wed, Dec 4, 2019 at 11:08 PM rescue via cctalk <cctalk@classiccmp.org> wrote:
> I have a TRS-80 Model III with a IV upgrade in it (non gate array). > I have a hunch that one or two of the HALs are bad (the primary one > Anyone know if these can be read, or if they are protected (for > example, if I were able to borrow some working ones, could they be > duplicated ?) ? Last year I read most of the PALs and HALs of a TRS-80 Model 16B main board (same as Model 12 main board). I was surprised that none of the PALs were protected, and even more surprised that some (but not all) of the HALs could be read as PALs.
