Editing Apple Display Card 8•24 (section)

== Display modes ==
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+'''8•24 display modes (Apple data sheet)'''
! Display !! Resolution !! Colours or greys
|-
| Apple High-Resolution Monochrome Monitor || 640 × 480 || 2, 4, 16 or 256 greys
|-
| AppleColor High-Resolution RGB Monitor || 640 × 480 || 2, 4, 16, 256 or 16.7 million colours
|-
| [[Apple Portrait Display]] || 640 × 870 || 2, 4, 16 or 256 greys
|-
| [[Apple Two-Page Monochrome Monitor]] || 1152 × 870 || 2, 4, 16 or 256 greys
|-
| Interlaced video devices || 640 × 480 || 2, 4, 16, 256 or 16.7 million colours (convolution up to 256)
|-
| [[Apple 14" Color Display|Apple Color Display (14")]] || 640 × 480 || 2, 4, 16 or 256 colours
|-
| [[Apple 16" Color Display|Macintosh 16-inch Color Display]] || 832 × 624 || 2, 4, 16 or 256 colours
|-
| [[Apple 21" Color Display|Macintosh 21-inch Color Display]] || 1152 × 870 || 2, 4, 16 or 256 colours
|}
The 16-inch and 21-inch rows were added to the data sheet in June 1993.<ref name="til5422" /> The 16-inch display needs a Rev. B card or the ROM upgrade.<ref name="til8698">Apple Computer, "Macintosh Display Card 8•24: Benefits of ROM Upgrade", Tech Info Library article 8698, created 5 September 1991, last updated 5 February 1992, file TIL00001_to_TIL09432.pdf in the APPLE_TIL_ARTICLES collection. Source for: the ROM upgrade being primarily for PAL timing; the original card driving the 21-inch Color Display; the upgrade needed for the 16-inch Color Display announced in January 1992; choice of 9300 K or 6500 K white point; service upgrade kit 076-0548.</ref> Apple's 1996 service guide adds the later displays: 16.7 million colours on the Macintosh 12" RGB, Color Plus 14", Performa displays and multiple scan displays at 640 × 480; 256 colours on the 16-inch and 21-inch displays, and on multiple scan displays at 832 × 624 and 1152 × 870 through a display adapter, with 832 × 624 needing a Rev. B card; nothing at 1024 × 768 or 1280 × 1024; and no support for the Apple Basic Color Monitor.<ref name="sg1996">Apple Computer, ''Macintosh Displays and Video Cards'' service guide, September 1996, hosted as [[:File:Apple Macintosh Displays and Video Cards Service Guide (September 1996).pdf]] (described at [[Apple Macintosh Displays and Video Cards Service Guide (1996)]]). Line drawings of the 4/8, 8/24 and 8/24 GC p. 324; video card parts list and notes pp. 325-326; troubleshooting chart p. 327; 4•8 and 8•24 GC upgrade procedures p. 330; Table 16, "Video Cards–Card Compatibility and Video Output Chart", pp. 342-343.</ref> The card cannot switch resolution on a multiple scan display without an adapter, and it has no 16-bit mode.<ref name="lem824" /><ref name="til9858">Apple Computer, "Macintosh Display Cards 8•24 & 8•24 GC: Rev A/B Differences", Tech Info Library article 9858, created 18 February 1992, file TIL09433_to_TIL17062.pdf in the APPLE_TIL_ARTICLES collection. Source for: the Rev. B 8•24 GC's new CLUT/DAC supporting 16-bit colour; no 16-bit colour on an upgraded Rev. A GC or on the 8•24; older 8•24 and GC cards needing the ROM upgrade for the 16-inch Color Monitor.</ref>