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Message
Author  Author ::  Oles
Posted  Posted ::  2015-04-23 10:12:43 PM
Subject  Subject ::  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?
 
Message
Author  Author ::  Roman Bórik
Posted  Posted ::  2015-04-24 11:50:53 AM
Subject  Subject ::  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.
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