SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 150

• Manufacturer Part Number: SPC8104
• Description: VGA LCD CONTROLLER
• Manufacturer: S-MOS Systems

BIOS Functional Specification
SP2-44
8. Program the panel geometry. This is done by programming the CRTC_B set of registers at 3Dx or 3Bx.
9. At this point all non-standard registers have been initialized. They need not be programmed again (except for
10. Print signon message
AUX[00h] |= 00000001b ; enable CRTC_B space (or in bit 0 = 1)
CRTC[01h] = 640/8
CRTC[05h] = 12
CRTC[10h] = 2
CRTC[12h] = 480/2
AUX[00h] &= 11111110b ; disable CRTC_B addressing (clear AUX[00h] bit 0)
power-downs). Continue with standard inititialization:
set up interrupt vectors 42h,10h,6dh
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
; CRTC_B[1] = 640/8 = 80 (dec)
; horz. non-display period (for max frame rate)
; vert. non-display periof = 2 lines
; 8 MSB of 480
...
X15-SP-002-03
set mode 3 (or 7 if CGA present)
412-1.0
SPC8104