From fa99ba375bdcad5776b57f99c86f97cd898dfdf3 Mon Sep 17 00:00:00 2001 From: Matthias Kolja Miehl Date: Sun, 13 Nov 2022 10:24:13 +0100 Subject: [PATCH] Fix typo in readme --- README.MD | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.MD b/README.MD index e584380..f3c0ef4 100644 --- a/README.MD +++ b/README.MD @@ -2,7 +2,7 @@ ![A 3d render of the board](EDA/card-render-partial.png "A render of the clone PCB") -This project aims to reproduce the LMSI CM-153 card needed to operate a Philips CM-100 CD-ROM drive. This drive was originally released in 1985 and used an early version of the LSMI protocol to connect. Later versions of LMSI cards, such as the CM-260, are not compatible with earlier drives (I do not know what the exactly compatibilities are). So an early card is required. The CM-153 is a very uncommon part to find due to it's limited use, high cost, and the fact that it would probably be tossed out with the computer when upgraded being separated from its original drive. +This project aims to reproduce the LMSI CM-153 card needed to operate a Philips CM-100 CD-ROM drive. This drive was originally released in 1985 and used an early version of the LSMI protocol to connect. Later versions of LMSI cards, such as the CM-260, are not compatible with earlier drives (I do not know what the exact compatibilities are). So an early card is required. The CM-153 is a very uncommon part to find due to it's limited use, high cost, and the fact that it would probably be tossed out with the computer when upgraded being separated from its original drive. Thanks to Roland who has a [working CM-100 and CM-153](https://www.youtube.com/watch?v=fj-uSWg0LOY) we have some pretty high quality reference images of what this card looks like. It uses all off the shelf 74 series logic chips and one 8251A UART controller. It should therefore be possible to recreate without needing any rare chips or ROM dumps.