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collapseos
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2 Commits

Author SHA1 Message Date
Virgil Dupras d1718a90c7 sms: add support for VDP's text mode 
Because that mode behaves exactly like in a regular TMS9918, a new
driver for TMS9918 has been added in blkfs and SMS' VDP now uses it.

Also, fix broken 5x7 font.
 2020-11-13 12:18:00 -05:00
Virgil Dupras 09c01c4a43 emul/z80: extract tms9918 unit from sms_vdp 
I'm planning on supporting Text Mode soon, and SMS' VDP, when mode
4 is not active, behaves mostly like a regular TMS9918.

By having this behavior in a separate unit, we'll be able to use it
in other systems.
 2020-11-12 11:13:18 -05:00