From 0777681e4c747bb91d4d7958c75c37d140a1a3eb Mon Sep 17 00:00:00 2001
From: Amber <amberisvibin@gmail.com>
Date: Wed, 23 Oct 2024 14:49:25 -0400
Subject: [PATCH] mmu info

---
 docs/74ls612.txt | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 docs/74ls612.txt

diff --git a/docs/74ls612.txt b/docs/74ls612.txt
new file mode 100644
index 0000000..1924c1e
--- /dev/null
+++ b/docs/74ls612.txt
@@ -0,0 +1,6 @@
+TTL devices can handle CMOS input. HD6309 -> 74LS612
+CMOS devices may or may not handle TTL input. 74LS612 -> peripherals
+
+62256 SRAM, 28C256 EEPROM, 16550 UART all handle TTL input.
+82C42 lists it's outputs as TTL compatible, but says nothing for inputs.
+Must ensure all peripherals are rated for TTL input.