View source for VCB02 Video Controller

'''VCB02 Video Controller''' 

VCB02 1/4/8 Plane Video [[QBUS]] Subsystem 1024x864

== VCB02 Modules ==

{| class="wikitable" style="text-align:center;"
! Module !! Description
|-
| [[M7615]] || Quad Monochrome Graphics Module
|-
| [[M7168]] || Quad 4 Plane Color Bitmap 
|-
| [[M7169]] || Quad Q22 Bus Video Controller Module
|}


== VCB02 Configurations ==

{| class="wikitable" style="text-align:center;"
! colspan="2" | VCB02 Option !! M7615 !! M7168 !! M7169
|-
| -A || Mono 1 Plane (B/W) || 1 || - || - 
|-
| -B || Color 4 Plane || - || 1 || 1
|-
| -C || Color 8 Plane || - || 2 || 1
|-
| -D || Mono 4 Plane || - || 1 || 1
|-
| -E || Mono 8 Plane || - || 2 || 1
|-
| -F || Upgrade 4 to 8 Plane || - || 1 || -
|}

1 Plane allows black/white graphics. 

4 Planes allow for 16 colors / resp. 16 shades of gray from a palette of 16.7 million.

8 Planes allow for 256 colors / resp. 256 shades of gray from a palette of 16.7 million.

The only difference between the 4/8 Plane Color and Mono versions are the bulkhead assemblies:
* 70-22661-01: Color
* 70-22661-02: Color to Mono

== VCB02 Options and VAXstation Enclosures ==

In the times of the MicroVAX II the smaller [[BA23]] enclosure supported only the 4 Plane VCB02 options.

To use the 8 Plane options you had to use the bigger [[BA123]] enclosure.

This restriction was due to problems with the BA23 power supply and cooling.

For the [[VAXstation 3200/3500 | VAXstation 3200]] the BA23 power supply as well as cooling were improved so that the restriction was removed. 

== VCB02 Monitors ==

Initially the VCB02 was delivered with one of the two types of monitors:
* [[VR160]] 19" 1024 x 864 Monochrome Monitor; connected with a BC18P-10 Monochrome Cable 
* [[VR290]] 19" 1024 x 864 Color Monitor; connected with a BC18Z-10 Color Cable

More monitor models were added lateron, e.g. the [[VR299]]

== VCB02 Usage ==

The VCB02 was used with the following VAXstation models:

* [[VAXstation II]]
* [[VAXstation II | VAXstation II/GPX]]
* [[VAXstation 3200]]
* [[VAXstation 3500]]
* [[VAXserver 4000 series]], upgraded with: VS30U Field Upgrade of Q-bus VAXservers to Q-bus workstations

==External links==

* [http://www.bitsavers.org/pdf/dec/qbus/MP02083_VCB02_schem_Jan86.pdf VCB02 Field Maintenance Print Set] (MP-02083-01 Rev. A)
* [http://www.bitsavers.org/pdf/dec/qbus/vcb02/AZ-GLGAB-MN_VCB02_Technical_Manual_Feb86.pdf VCB02 Technical Manual] (AZ-GLGAB-MN)
* [https://manx-docs.org/collections/antonio/dec/MDS-2000-01/cd1/VAX/VS30UAD1.PDF VAXserver 4000 Series Systems VS30U Graphic Upgrade Addendum] (EK-VS30U-AD-001)


[[Category: QBUS Display Controllers]]