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Finally I Have a Character ROM Code

A project log for TRS-80 Compatible Clone

A TRS-80 using more modern parts

hacker404Hacker404 • 05/31/2015 at 12:10•1 Comment

Here's what it looks like -

The above is what it will look like on a standard 4:3 screen. The character are double spaced both horizontally and vertically.

I modified the characters so that the descenders drop further -

Below is a render of what it looks like in ROM (when it gets there).

And the code - Javascript format as I used Javascript to render it. 

0x00,0x1F,0x11,0x11,0x11,0x11,0x11,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x1F,0x10,0x10,0x10,0x10,0x10,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x08,0x04,0x02,0x0F,0x04,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x1F,0x11,0x1B,0x15,0x1B,0x11,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0x02,0x14,0x18,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x0E,0x11,0x11,0x1F,0x0A,0x0A,0x1B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x04,0x08,0x1E,0x09,0x05,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x04,0x02,0x1F,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x04,0x15,0x0E,0x04,0x15,0x0E,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x0C,0x0C,0x08,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x07,0x07,0x07,0x07,0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x38,0x38,0x38,0x38,0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x38,0x38,0x38,0x38,0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x3F,0x3F,0x3F,0x3F,0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x07,0x07,0x07,0x07,0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x3F,0x3F,0x3F,0x3F,0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x07,0x07,0x07,0x07,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x38,0x38,0x38,0x38,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00,
0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x00,0x00,0x00,0x00

That's it for today!
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Discussions

magiclant3rn wrote 06/04/2015 at 17:56 • point

Lowercase letters were not available on the Model I regardless of which ROMs were used. They may have been defined in the ROM, but were not displayable because they only installed enough static RAMs to support the uppercase alphabet. Instead of eight static RAMs for eight bits, they installed fewer to cut cost. A workaround was to solder an additional static RAM piggy backed onto an existing one, bending up the address and data pins and connecting those with jumper wires to the bus. Then you had to load a driver. A toggle switch was sometimes installed to disable the mod when the driver wasn't loaded.

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