Five indepth packages (documents) created by Michael C. Matte in 1986 to convert an Astrocade to use high-resolution mode.

	Cover Letter      This two-page letter gives an overall view of the five packages. (136 K)
	Hi-Res Package 1 - Astrocade System Upgrade      Fifteen pages of schematics and layouts. (4.2 MB)
	Hi-Res Package 2 - Low/High Resolution Modification Procedure      Twenty pages describing what and how to modify the Astrocade motherboard plus wire the RAM board, which contains video and user RAM. (1 MB)
	Hi-Res Package 3 - Copies of some Datamax UV-R1 Schematics      These three schematics were used to come up with the Astrocade system upgrade shown in package 1. (2.7 MB)
	Hi-Res Package 4 - 44K Byte Dynamic RAM Add-On      This one-page instruction sheet uses three schematics in "Package 1 Astrocade System Upgrade" to make some deletions for this upgrade. (58 K)
	Hi-Res Package 5 - 12K Byte Static RAM Add-On      Static RAM does not require any refreshing or special timing circuitry. Data will remain intact as long as +5V is supplied to the board and the write protect switch is on. This feature allows the board to be disconnected from one computer and connected to a second computer or allow cartridge swapping without running loops. In either case, the data in Static RAM will remain intact (unchanged). This document is six pages of directions, schematics and layouts. (248 K)

Since image files are compressed in a PDF document I have included some of the package schematics and layouts in PNG or TIFF uncompressed versions. Note that these uncompressed images are included in the original PDF documents. These uncompressed versions are for somebody that needs a really good look at the schematics because they are actually building the hi-res upgrade.

	Hi-Res Package 1 Schematics in PNG Format      Includes: Bally Motherboard Schematic, Bally Motherboard Layout, Video RAM Schematic and Video RAM Layout. (5.23 MB)
	Hi-Res Package 3 Schematics in TIFF Format      Includes three schematics: CPU Board, Multiple Page Screen RAM, and "Video Board" Detail. (6.77 MB)
	Hi-Res Package 5 - 12K Byte Static RAM Add-On Schematics in TIFF Format      Includes: 50-Contact Expand Interface Schematic, Balcheck II Display Schematic, Static Ram / Videocade Copier Schematic, and Layout. (361 K)