Autor ::Roman Bórik Poslaná :: 23.04.2015 22:00:20 Predmet ::Re: PMD-85A
Unfortunately, without HW changes on the main board, not. Main board contains four 24 pin DIP sockets for 1kB EPROM 2708.
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Autor ::Oles Poslaná :: 23.04.2015 22:12:43 Predmet ::Re: PMD-85A
(( This is bad
I undestand i need make some changes on board but one 2764 chips is better then four 2708
Anybody do this?
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Autor ::Roman Bórik Poslaná :: 24.04.2015 11:50:53 Predmet ::Re: PMD-85A
On the following site you can find whole schematic of the PMD 85-2A (other models PMD 85 too). http://www.sapi.cz/pmd-85/pmd85-2a.php
You can try to replace old 1kB ROMs by new 4kB/8kB ROM.
ROM begins at 8000h and ends ar 8FFFh. Keep in mind that ROM is mirrored from 0A000h to 0AFFFh.
