hoard-of-bitfonts/trs-80

TRS-80 Model I, Model III, Model 4

Model I

The original TRS-80 was later referred to as the Model I.

• mc6674 is the glyph set from the Motorola MC-6674 character generator, based on its datasheet.
• mc6670p is a dump of the TRS-80's character generator, a slightly modified MC-6674 with arrow symbols in 0x5b-0x5e. Both of these include lowercase and ISO-2047 symbols for the C0 controls, which were not accessible through BASIC.
• mc6674-semigraphics is a representation of the 2x3-pixel semigraphics generated by these chips.
• trs80-model1 is the character set in the order of CHR$ values in BASIC. Note that this file includes lowercase and C0 symbols, which would not have been accessible.
• trs80-model1-lowercase is an updated character set where lowercase characters have descenders below the baseline. This set was originally introduced with the Radio Shack lowercase modification kit and included as standard in late models of the Model I.

Model III and Model 4

Models III and the original Model 4 shared the same character set.

• 8044316a is a dump of the character generator. This includes both Katakana and a Greek+dingbats symbol set, that were not concurrently accessible.
• trs80-model3-4-kana is the character set in the CHR$ order, if the Kana set was selected.
• trs80-model3-4-sym is the character set in the CHR$ order, if the symbol set was selected.

Additionally, a European variant Model 4 character ROM is included.

• 8049007 is a dump of its character generator. Accented Latin glyphs replace the Kana in the 8044316a set.
• trs80-model4-int-latin is the character set in the CHR$ order, if the Latin set was selected.
• trs80-model4-int-sm is the character set in the CHR$ order, if the symbol set was selected.

Related systems and clones

The Mera-Elzab Meritum was a Polish variant of the TRS-80 Model I.

• mera-elzab-meritum is its glyph set, which was uppercase only and included accented Latin characters needed to write Polish.
• mera-elzab-meritum-lowercase is a variant without Polish letters but including standard ASCII lowercase. This may have been used in a later experimental networking version of the Meritum.

The EACA Video Genie/Dick Smith Sytem 80/PMC-80 was a mostly compatible Model I variant. It was succeeded by the related but less compatible EACA Colour Genie.

• eaca-eg3003-video-genie is based on a ROM dump of an EACA EG3003, used with MAME.
• eaca-eg2000-colour-genie-1 and eaca-eg2000-colour-genie-g are based on font dumps used with MAME. They look consistent with online images.

Color Computer 1/2 & Color Computer 3

The CoCo 1 and 2 used the MC-6847 character generator with a characteristic square O.

• mc6874 is the character generator's glyph set, from a decapped chip.
• mc6874-semigraphics-4 is the 2x2 semigraphics set that was accessible alongside alphanumerics.
• mc6874-semigraphics-6 is the 3x2 semigraphics set that was used in a semigraphics-only mode.
• trs80-coco has the CoCo's glyph set as accessed trough BASIC, including reverse-video and 2x2 semigraphics, repeated as different CHR$ values corresponded to differnet colours.

A later CoCo 2 used the MC-6847T1 which added lowercase and reshaped letters including a round O.

• mc6874t1 is the character generator's glyph set, from its datasheet.
• trs80-coco2-lowercase is the set as seen through BASIC.

The CoCo 3 used a GIME character generator.

• trs80-coco3 is the character generator's glyph set, given in the ROM order but labelled with CHR$ values.

Related systems

The Dragon 32/64 was a TRS-80 clone using an MC-6847 VDG.

• dragon200e is the glyph set used in the Dragon 200E, a Spanish variant of the Dragon 64 that uses an external ROM to supply the MC6847 with a custom character set. The machine has a daughterboard with the extra ROM and the decode logic, plus a jumper to make it look in normal or inverse video. This set was dumped from the ROM and checked against the original hardware.

The VTech Laser / Dick Smith VZ series used MC6847 VDGs like the CoCo models, even if these were not CoCo clones and indeed more related to the TRS-80 Model 1.

Others

• trs-80-m2 is the character set from a TRS-80 Model II ROM.
• trs-80-dt1 is the caracter set from a TRS-80 DT-1 Data Terminal ROM.
• The TRS-80 Model 100 (a.k.a. Model T) was a variant of the Kyotronic-85 - see there.