diff -r 6faac5ee8017 -r 9e963e155d4c content/hp3562a_2.rst
--- a/content/hp3562a_2.rst	Thu Nov 10 16:46:54 2022 +0100
+++ b/content/hp3562a_2.rst	Thu Nov 10 17:26:20 2022 +0100
@@ -20,6 +20,7 @@
 of small CPU for the time).
 
 .. image:: {static}/images/hp3562a/cpu.jpg
+   :alt: Picture of the main 68000 CPU of the HP3562A
 
 The 8 boards are:
 
@@ -52,6 +53,7 @@
 noise figures, bursts, sweeps, and so on.
 
 .. image:: {static}/images/hp3562a/a1_digital_source.jpg
+   :alt: Picture of the A1 Digital Source PCB of the HP3562A
 
 The Timing Control section looks like:
 
@@ -92,10 +94,12 @@
 processing of the instrument.
 
 .. image:: {static}/images/hp3562a/hp3562a_a2_block_diagram.png
+   :alt: Blocke diagram of the A2 board of the HP3562A
 
 The main CPU board, with the beautiful MC68000P9 DIP64 package:
 
 .. image:: {static}/images/hp3562a/a2_cpu.jpg
+   :alt: Picture of the A2 CPU board of the HP3562A
 
 It comes with 2 populated M5M256BP static ram chips (32k x 8bits), for
 the CPU, but seems to be capable of holding 4 more of them. The CPU
@@ -116,12 +120,14 @@
 ------
 
 .. image:: {static}/images/hp3562a/a38_memory.jpg
+   :alt: Picture of the A36 memory board of the HP3562A
 
 This board is described as an "extension of the read only memory of
 the system CPU board" and read/write memory used by most of the other
 assemblies.
 
 .. image:: {static}/images/hp3562a/hp3562a_a38_memory_block_diagram.png
+   :alt: Block diagram of the A38 memory board of the HP3562A
 
 The ROM section stores most programs for the HP 3562A except the
 startup routines (which are on the ROM ships of the A2 CPU
@@ -131,6 +137,7 @@
 used. ROM density is selected by placement of jumpers.
 
 .. image:: {static}/images/hp3562a/hp3562a_a38_rom_block_diagram.png
+   :alt: Block diagram of the RAM/ROM selection mecanism on the A38 board of the HP3562A
 
 
 The RAM section of the assembly consist of 4 32k by 8 bits static RAM
@@ -139,6 +146,7 @@
 Display, FPP and the system CPU).
 
 .. image:: {static}/images/hp3562a/hp3562a_a38_ram_block_diagram.png
+   :alt: Block diagram of the memory bus pipeline of the HP3562A
 
 The Display Controller section also lies on this A38 board.
 
@@ -154,9 +162,16 @@
 (synchronized with the sample rate). The sinusoidal signal is
 generated from a table of values stored in the ROM.
 
-.. image:: {static}/images/hp3562a/hp3562a_a4_block_diagram.png
+.. figure:: {static}/images/hp3562a/hp3562a_a4_block_diagram.png
+   :alt: Block diagram of the A4 local oscillator board of the HP3562A
+   
+   Block diagram of the A4 local oscillator board of the HP3562A
 
-.. image:: {static}/images/hp3562a/a4_loc.jpg
+
+.. figure:: {static}/images/hp3562a/a4_loc.jpg
+   :alt: Picture of the A4 bloard of the HP3562A
+   
+   Picture of the A4 bloard of the HP3562A
 
 
 
@@ -244,19 +259,29 @@
 FFT
 ---
 
-.. image:: {static}/images/hp3562a/hp3562a_a9_block_diagram.png
+.. figure:: {static}/images/hp3562a/hp3562a_a9_block_diagram.png
+   :alt: Block diagram of the A9 FFT board of the HP3562A
+   
+   Block diagram of the A9 FFT board
 
 The FFT board performs windowing, FFT and Inverse FFT directly from
 and to the RAM.
 It's built around a TMS230 microprocessor runningat 5MHz
 
-.. image:: {static}/images/hp3562a/a9_fft.jpg
+.. figure:: {static}/images/hp3562a/a9_fft.jpg
+   :alt: Picture of the A9 FFT board of the HP3562A
+   
+   Picture of the A9 FFT board
+
 
 
 Keyboard
 --------
 
-.. image:: {static}/images/hp3562a/hp3562a_a15_block_diagram.png
+.. figure:: {static}/images/hp3562a/hp3562a_a15_block_diagram.png
+   :alt: Block diagram of the keyboard processor
+   
+   Block diagram of the keyboard processor
 
 
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