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Merge pull request #657 from dinoboards/dean-dev-2026-02-04-tms-vram-probe-tweak
tms: updated vram detection to disable screen during vram probing
master
Wayne Warthen
2 days ago
committed by
GitHub
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GPG Key ID: B5690EEEBB952194
1 changed files with
14 additions and
1 deletions
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Source/HBIOS/tms.asm
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@ -68,7 +68,8 @@ |
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; Unused: $???? $???? |
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; Unused: $???? $???? |
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; |
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; |
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TMSCTRL1: .EQU 1 ; CONTROL BITS |
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TMSCTRL1: .EQU 1 ; CONTROL BITS |
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TMSINTEN: .EQU 5 ; INTERRUPT ENABLE BIT |
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TMSINTEN: .EQU 5 ; IEO - INTERRUPT ENABLE BIT |
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TMSDISEN: .EQU 6 ; BL - DISPLAY ENABLE BIT |
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; |
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; |
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TMSKBD_NONE .EQU 0 |
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TMSKBD_NONE .EQU 0 |
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TMSKBD_KBD .EQU 1 |
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TMSKBD_KBD .EQU 1 |
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@ -1003,6 +1004,13 @@ TMS_VRMPRB_1MB: |
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RET ; AND RETURN |
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RET ; AND RETURN |
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; |
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TMS_VRMPRB1: |
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TMS_VRMPRB1: |
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; DISABLE SCREEN WHILE PROBING RAM |
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; TO REDUCE MEMORY LATENCY ISSUES |
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LD C,TMSCTRL1 ; REGISTER #1 |
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LD A,(TMS_INITVDU_REG_1) ; VALUE TO SET |
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RES TMSDISEN,A ; CLEAR TO DISABLE SCREEN |
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CALL TMS_SET_X ; DO IT |
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; START OF REAL VRAM PROBING |
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; START OF REAL VRAM PROBING |
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LD A,4 ; SET RETURN VALUE FOR 64K |
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LD A,4 ; SET RETURN VALUE FOR 64K |
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EX AF,AF' |
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EX AF,AF' |
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@ -1078,6 +1086,11 @@ VRAMSIZE_DONE: |
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XOR A |
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XOR A |
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LD C,14 |
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LD C,14 |
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CALL TMS_SET_X |
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CALL TMS_SET_X |
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; RE-EANBLE DISPLAY |
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LD C,TMSCTRL1 ; REGISTER #1 |
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LD A,(TMS_INITVDU_REG_1) ; VALUE TO SET |
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CALL TMS_SET_X ; DO IT |
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; |
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; |
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EX AF, AF' |
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EX AF, AF' |
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RET |
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RET |
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