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7.1.6 VRAM
The INP function may read the VRAM data. The OUT statement writes data into the VRAM so
that graphics may be displayed on the LCD dotwise.
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Specifying an address bytewise
An address on the LCD may be specified bytewise by giving a port number in the OUT state-
ment and INP function. The entry range of the port number is as follows:
Port numbering system counts, starting from the top left corner of the LCD to the right bottom
corner. The figure below shows the port numbers available on the BHT-7000.
Series Entry range of the port number
BHT-3000
BHT-4000
BHT-5000
BHT-6000
BHT-6500
BHT-7000
BHT-7500
10h to 18Fh
10h to 64Fh
10h to 40Fh
10h to 24Fh
10h to 24Fh
10h to 40Fh
10h to C7Fh
10h 8Fh
90h 10Fh
110h 18Fh
190h 20Fh
390h 40Fh
310h 38Fh
290h 30Fh
210h 28Fh
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