collapseos/blk/471
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

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CODE _blank ( this is way too slow in Forth )
A XORr, TMS_CTLPORT OUTiA,
A 0x40 LDri, TMS_CTLPORT OUTiA,
HL 0x4000 LDdi,
BEGIN,
A XORr, TMS_DATAPORT OUTiA,
HL DECd, HLZ,
JRNZ, AGAIN,
;CODE